{"id":236,"date":"2024-10-15T12:36:14","date_gmt":"2024-10-15T04:36:14","guid":{"rendered":"https:\/\/leezp.top\/?p=236"},"modified":"2024-10-15T14:53:27","modified_gmt":"2024-10-15T06:53:27","slug":"java%e5%9f%ba%e7%a1%80%e7%9f%a5%e8%af%86%ef%bc%88%e6%9c%ba%e8%af%95%e5%a4%8d%e4%b9%a0%e7%94%a8%ef%bc%89","status":"publish","type":"post","link":"https:\/\/leezp.top\/?p=236","title":{"rendered":"Java\u57fa\u7840\u77e5\u8bc6\uff08\u673a\u8bd5\u590d\u4e60\u7528\uff09"},"content":{"rendered":"\n

Java 8 \u7279\u6027<\/h1>\n\n\n\n
    \n
  1. Lambda \u8868\u8fbe\u5f0f<\/strong> \uff1a\u5141\u8bb8\u4f7f\u7528\u66f4\u7b80\u6d01\u7684\u8bed\u6cd5\u6765\u5b9a\u4e49\u533f\u540d\u51fd\u6570\u3002\u5b83\u51cf\u5c11\u4e86\u6837\u677f\u4ee3\u7801\u5e76\u589e\u5f3a\u4e86\u53ef\u8bfb\u6027\u3002<\/li>\n<\/ol>\n\n\n\n
    Java<\/span><\/path><\/path><\/svg><\/span>
    List<\/span><<\/span>Integer<\/span>> <\/span>numbers<\/span> = <\/span>Arrays<\/span>.<\/span>asList<\/span>(<\/span>1<\/span>, <\/span>2<\/span>, <\/span>3<\/span>);<\/span><\/span>\nnumbers<\/span>.<\/span>forEach<\/span>(n <\/span>-><\/span> <\/span>System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(n));<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
      \n
    1. \u51fd\u6570\u5f0f\u63a5\u53e3<\/strong> \uff1a\u53ea\u6709\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\u7684\u63a5\u53e3\uff0c\u53ef\u4ee5\u4e0e Lambda \u8868\u8fbe\u5f0f\u4e00\u8d77\u4f7f\u7528\uff0c\u5982 java.util.function<\/code> \u4e2d\u7684\u63a5\u53e3\u3002<\/li>\n<\/ol>\n\n\n\n
      Java<\/span><\/path><\/path><\/svg><\/span>
      @<\/span>FunctionalInterface<\/span><\/span>\ninterface<\/span> <\/span>MyFunction<\/span> {<\/span><\/span>\n    <\/span>void<\/span> <\/span>apply<\/span>();<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
        \n
      1. Stream API<\/strong> \uff1a\u63d0\u4f9b\u5904\u7406\u96c6\u5408\u6570\u636e\u7684\u65b0\u65b9\u5f0f\uff0c\u652f\u6301\u94fe\u5f0f\u64cd\u4f5c\u3002<\/li>\n<\/ol>\n\n\n\n
        Java<\/span><\/path><\/path><\/svg><\/span>
        List<\/span><<\/span>String<\/span>> <\/span>list<\/span> = <\/span>Arrays<\/span>.<\/span>asList<\/span>(<\/span>"a"<\/span>, <\/span>"b"<\/span>, <\/span>"c"<\/span>);<\/span><\/span>\nlist<\/span>.<\/span>stream<\/span>().<\/span>filter<\/span>(s <\/span>-><\/span> <\/span>s<\/span>.<\/span>startsWith<\/span>(<\/span>"a"<\/span>)).<\/span>forEach<\/span>(<\/span>System<\/span>.<\/span>out<\/span>::<\/span>println);<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
          \n
        1. \u63a5\u53e3\u7684\u9ed8\u8ba4\u65b9\u6cd5\u548c\u9759\u6001\u65b9\u6cd5<\/strong> \uff1a\u53ef\u4ee5\u5728\u63a5\u53e3\u4e2d\u5b9a\u4e49\u9ed8\u8ba4\u5b9e\u73b0\u548c\u9759\u6001\u65b9\u6cd5\uff0c\u89e3\u51b3\u4e86\u63a5\u53e3\u6269\u5c55\u7684\u517c\u5bb9\u95ee\u9898\u3002<\/li>\n<\/ol>\n\n\n\n
          Java<\/span><\/path><\/path><\/svg><\/span>
          interface<\/span> <\/span>MyInterface<\/span> {<\/span><\/span>\n    <\/span>default<\/span> <\/span>void<\/span> <\/span>myMethod<\/span>() { <\/span>System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>"Default Method"<\/span>); }<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
            \n
          1. Optional \u7c7b<\/strong> \uff1a\u7528\u6765\u907f\u514d null<\/code> \u503c\u5f15\u53d1\u7684 NullPointerException<\/code>\u3002<\/li>\n<\/ol>\n\n\n\n
            Java<\/span><\/path><\/path><\/svg><\/span>
            Optional<\/span><<\/span>String<\/span>> <\/span>opt<\/span> = <\/span>Optional<\/span>.<\/span>of<\/span>(<\/span>"value"<\/span>);<\/span><\/span>\nopt<\/span>.<\/span>ifPresent<\/span>(<\/span>System<\/span>.<\/span>out<\/span>::<\/span>println);<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
              \n
            1. \u65b0\u65e5\u671f\u65f6\u95f4 API<\/strong> \uff1ajava.time<\/code> \u5305\u63d0\u4f9b\u4e86\u5168\u65b0\u7684\u65e5\u671f\u548c\u65f6\u95f4\u5904\u7406\u7c7b\uff0c\u5982 LocalDate<\/code>, LocalTime<\/code>, LocalDateTime<\/code> \u7b49\u3002<\/li>\n<\/ol>\n\n\n\n
              \n\n\n\n
              Java \u57fa\u672c\u8bed\u6cd5<\/h1>\n\n\n\n
              \u53d8\u91cf\u4e0e\u6570\u636e\u7c7b\u578b<\/h2>\n\n\n\n
              Java \u662f\u5f3a\u7c7b\u578b\u8bed\u8a00\uff0c\u6240\u6709\u53d8\u91cf\u90fd\u9700\u8981\u58f0\u660e\u7c7b\u578b\u3002\u5e38\u89c1\u7684\u6570\u636e\u7c7b\u578b\u5206\u4e3a\u4e24\u7c7b\uff1a<\/p>\n\n\n\n
                \n
              • \u57fa\u672c\u6570\u636e\u7c7b\u578b<\/strong> \uff1a<\/li>\n\n\n\n
              • \u6574\u578b\uff1abyte<\/code> (8 \u4f4d), short<\/code> (16 \u4f4d), int<\/code> (32 \u4f4d), long<\/code> (64 \u4f4d)<\/li>\n\n\n\n
              • \u6d6e\u70b9\u578b\uff1afloat<\/code> (32 \u4f4d), double<\/code> (64 \u4f4d)<\/li>\n\n\n\n
              • \u5b57\u7b26\u578b\uff1achar<\/code> (16 \u4f4d\uff0c\u7528\u4e8e\u5b58\u50a8\u5355\u4e2a Unicode \u5b57\u7b26)<\/li>\n\n\n\n
              • \u5e03\u5c14\u578b\uff1aboolean<\/code> (\u5b58\u50a8 true<\/code> \u6216 false<\/code>)<\/li>\n<\/ul>\n\n\n\n
                Java<\/span><\/path><\/path><\/svg><\/span>
                int<\/span> <\/span>a<\/span> = <\/span>10<\/span>;<\/span><\/span>\ndouble<\/span> <\/span>pi<\/span> = <\/span>3.14159<\/span>;<\/span><\/span>\nboolean<\/span> <\/span>isJavaFun<\/span> = <\/span>true<\/span>;<\/span><\/span>\nchar<\/span> <\/span>grade<\/span> = <\/span>'A'<\/span>;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                  \n
                • \u5f15\u7528\u6570\u636e\u7c7b\u578b<\/strong>  \u5305\u62ec\u7c7b\u3001\u63a5\u53e3\u3001\u6570\u7ec4\u7b49\u3002<\/li>\n<\/ul>\n\n\n\n
                  Java<\/span><\/path><\/path><\/svg><\/span>
                  String<\/span> <\/span>name<\/span> = <\/span>"John"<\/span>;  <\/span>\/\/ String \u662f\u5f15\u7528\u7c7b\u578b<\/span><\/span>\nint<\/span>[] <\/span>numbers<\/span> = <\/span>new<\/span> <\/span>int<\/span>[<\/span>5<\/span>];  <\/span>\/\/ \u6570\u7ec4\u662f\u5f15\u7528\u7c7b\u578b<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                  \u8fd0\u7b97\u7b26<\/h2>\n\n\n\n
                  Java \u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u8fd0\u7b97\u7b26\uff0c\u4e3b\u8981\u5206\u4e3a\u4ee5\u4e0b\u51e0\u7c7b\uff1a<\/p>\n\n\n\n
                    \n
                  • \u7b97\u672f\u8fd0\u7b97\u7b26<\/strong> \uff1a+<\/code>, -<\/code>, *<\/code>, \/<\/code>, %<\/code><\/li>\n\n\n\n
                  • \u5173\u7cfb\u8fd0\u7b97\u7b26<\/strong> \uff1a==<\/code>, !=<\/code>, ><\/code>, <<\/code>, >=<\/code>, <=<\/code><\/li>\n\n\n\n
                  • \u903b\u8f91\u8fd0\u7b97\u7b26<\/strong> \uff1a&&<\/code>, ||<\/code>, !<\/code><\/li>\n\n\n\n
                  • \u8d4b\u503c\u8fd0\u7b97\u7b26<\/strong> \uff1a=<\/code>, +=<\/code>, -=<\/code>, *=<\/code>, \/=<\/code><\/li>\n\n\n\n
                  • \u4f4d\u8fd0\u7b97\u7b26<\/strong> \uff1a&<\/code>, |<\/code>, ^<\/code>, ~<\/code>, <<<\/code>, >><\/code>, >>><\/code><\/li>\n<\/ul>\n\n\n\n
                    \u63a7\u5236\u7ed3\u6784<\/h2>\n\n\n\n
                    Java \u63d0\u4f9b\u7684\u63a7\u5236\u7ed3\u6784\u5305\u62ec\u6761\u4ef6\u5206\u652f\u548c\u5faa\u73af\u3002<\/p>\n\n\n\n
                      \n
                    • \u6761\u4ef6\u5206\u652f<\/strong> \uff1aif-else<\/code> \u548c switch<\/code> \u8bed\u53e5\u3002<\/li>\n<\/ul>\n\n\n\n
                      Java<\/span><\/path><\/path><\/svg><\/span>
                      if<\/span> (a > <\/span>0<\/span>) {<\/span><\/span>\n    <\/span>System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>"Positive"<\/span>);<\/span><\/span>\n} <\/span>else<\/span> {<\/span><\/span>\n    <\/span>System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>"Non-positive"<\/span>);<\/span><\/span>\n}<\/span><\/span>\n<\/span>\nswitch<\/span> (day) {<\/span><\/span>\n    <\/span>case<\/span> <\/span>1<\/span>:<\/span> <\/span>System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>"Monday"<\/span>); <\/span>break<\/span>;<\/span><\/span>\n    <\/span>case<\/span> <\/span>2<\/span>:<\/span> <\/span>System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>"Tuesday"<\/span>); <\/span>break<\/span>;<\/span><\/span>\n    <\/span>default:<\/span> <\/span>System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>"Other day"<\/span>);<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                        \n
                      • \u5faa\u73af<\/strong> \uff1afor<\/code>, while<\/code>, do-while<\/code> \u7ed3\u6784\u3002<\/li>\n<\/ul>\n\n\n\n
                        Java<\/span><\/path><\/path><\/svg><\/span>
                        for<\/span> (<\/span>int<\/span> <\/span>i<\/span> = <\/span>0<\/span>; i < <\/span>5<\/span>; i++) {<\/span><\/span>\n    <\/span>System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(i);<\/span><\/span>\n}<\/span><\/span>\n<\/span>\nint<\/span> <\/span>i<\/span> = <\/span>0<\/span>;<\/span><\/span>\nwhile<\/span> (i < <\/span>5<\/span>) {<\/span><\/span>\n    <\/span>System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(i);<\/span><\/span>\n    i++;<\/span><\/span>\n}<\/span><\/span>\n<\/span>\nimport<\/span> java.util.Scanner;<\/span><\/span>\nScanner<\/span> <\/span>scanner<\/span> = <\/span>new<\/span> <\/span>Scanner<\/span>(<\/span>System<\/span>.<\/span>in<\/span>);<\/span><\/span>\n <\/span>do<\/span> {<\/span><\/span>\n    <\/span>System<\/span>.<\/span>out<\/span>.<\/span>print<\/span>(<\/span>"\u8bf7\u8f93\u5165\u4e00\u4e2a\u6570\u5b57\uff08\u8f93\u5165\u8d1f\u6570\u7ed3\u675f\uff09\uff1a"<\/span>);<\/span><\/span>\n    number = <\/span>scanner<\/span>.<\/span>nextInt<\/span>();<\/span><\/span>\n    <\/span>if<\/span> (number >= <\/span>0<\/span>) {<\/span><\/span>\n        sum += number; <\/span>\/\/ \u53ea\u5728\u8f93\u5165\u975e\u8d1f\u6570\u65f6\u7d2f\u52a0<\/span><\/span>\n    }<\/span><\/span>\n} <\/span>while<\/span> (number >= <\/span>0<\/span>); <\/span>\/\/ \u5f53\u8f93\u5165\u975e\u8d1f\u6570\u65f6\u7ee7\u7eed\u5faa\u73af<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                        \u65b9\u6cd5<\/h2>\n\n\n\n
                        \u65b9\u6cd5\u662f Java \u4e2d\u7528\u6765\u6267\u884c\u67d0\u4e9b\u4efb\u52a1\u7684\u4ee3\u7801\u5757\uff0c\u652f\u6301\u53c2\u6570\u4f20\u9012\u548c\u8fd4\u56de\u503c\u3002<\/p>\n\n\n\n
                        Java<\/span><\/path><\/path><\/svg><\/span>
                        public<\/span> <\/span>int<\/span> <\/span>sum<\/span>(<\/span>int<\/span> a, <\/span>int<\/span> b) {<\/span><\/span>\n    <\/span>return<\/span> a + b;<\/span><\/span>\n}<\/span><\/span>\n<\/span>\nint<\/span> <\/span>result<\/span> = <\/span>sum<\/span>(<\/span>5<\/span>, <\/span>10<\/span>);  <\/span>\/\/ \u8c03\u7528\u65b9\u6cd5<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                        \u7c7b\u4e0e\u5bf9\u8c61<\/h2>\n\n\n\n
                        Java \u662f\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u8bed\u8a00\uff0c\u7c7b\u662f\u5bf9\u8c61\u7684\u84dd\u56fe\u6216\u6a21\u677f\u3002<\/p>\n\n\n\n
                        Java<\/span><\/path><\/path><\/svg><\/span>
                        class<\/span> <\/span>Person<\/span> {<\/span><\/span>\n    <\/span>String<\/span> <\/span>name<\/span>;<\/span><\/span>\n    <\/span>int<\/span> <\/span>age<\/span>;<\/span><\/span>\n<\/span>\n    <\/span>\/\/ \u6784\u9020\u65b9\u6cd5<\/span><\/span>\n    <\/span>Person<\/span>(<\/span>String<\/span> <\/span>name<\/span>, <\/span>int<\/span> <\/span>age<\/span>) {<\/span><\/span>\n        <\/span>this<\/span>.<\/span>name<\/span> = name;<\/span><\/span>\n        <\/span>this<\/span>.<\/span>age<\/span> = age;<\/span><\/span>\n    }<\/span><\/span>\n<\/span>\n    <\/span>\/\/ \u65b9\u6cd5<\/span><\/span>\n    <\/span>void<\/span> <\/span>greet<\/span>() {<\/span><\/span>\n        <\/span>System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>"Hello, "<\/span> + name);<\/span><\/span>\n    }<\/span><\/span>\n}<\/span><\/span>\n<\/span>\n\/\/ \u521b\u5efa\u5bf9\u8c61<\/span><\/span>\nPerson<\/span> <\/span>p<\/span> = <\/span>new<\/span> <\/span>Person<\/span>(<\/span>"Alice"<\/span>, <\/span>25<\/span>);<\/span><\/span>\np<\/span>.<\/span>greet<\/span>();  <\/span>\/\/ \u8c03\u7528\u65b9\u6cd5<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                        \n\n\n\n
                        \u5f02\u5e38\u5904\u7406\u673a\u5236<\/h1>\n\n\n\n
                        \u5f02\u5e38\u662f\u7a0b\u5e8f\u6267\u884c\u8fc7\u7a0b\u4e2d\u51fa\u73b0\u7684\u9519\u8bef\uff0cJava \u63d0\u4f9b\u4e86\u4e00\u5957\u7ed3\u6784\u5316\u7684\u5f02\u5e38\u5904\u7406\u673a\u5236\uff0c\u786e\u4fdd\u7a0b\u5e8f\u80fd\u591f\u4f18\u96c5\u5730\u5904\u7406\u9519\u8bef\u3002<\/p>\n\n\n\n
                          \n
                        1. try-catch<\/code> \u7ed3\u6784\uff1atry<\/code> \u5757\u4e2d\u653e\u7f6e\u53ef\u80fd\u4f1a\u5f15\u53d1\u5f02\u5e38\u7684\u4ee3\u7801\uff0ccatch<\/code> \u5757\u7528\u4e8e\u6355\u83b7\u5e76\u5904\u7406\u5f02\u5e38\u3002<\/li>\n<\/ol>\n\n\n\n
                          Java<\/span><\/path><\/path><\/svg><\/span>
                          try<\/span> {<\/span><\/span>\n    <\/span>int<\/span> <\/span>result<\/span> = <\/span>10<\/span> \/ <\/span>0<\/span>;  <\/span>\/\/ \u4f1a\u629b\u51fa ArithmeticException<\/span><\/span>\n} <\/span>catch<\/span> (<\/span>ArithmeticException<\/span> <\/span>e<\/span>) {<\/span><\/span>\n    <\/span>System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>"Cannot divide by zero!"<\/span>);<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                            \n
                          1. finally<\/code> \u5757\uff1afinally<\/code> \u5757\u4e2d\u7684\u4ee3\u7801\u65e0\u8bba\u662f\u5426\u53d1\u751f\u5f02\u5e38\u90fd\u4f1a\u6267\u884c\uff0c\u901a\u5e38\u7528\u4e8e\u5173\u95ed\u8d44\u6e90\u6216\u6e05\u7406\u64cd\u4f5c\u3002<\/li>\n<\/ol>\n\n\n\n
                            Java<\/span><\/path><\/path><\/svg><\/span>
                            try<\/span> {<\/span><\/span>\n    <\/span>\/\/ \u53ef\u80fd\u629b\u51fa\u5f02\u5e38\u7684\u4ee3\u7801<\/span><\/span>\n} <\/span>finally<\/span> {<\/span><\/span>\n    <\/span>System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>"This will always execute"<\/span>);<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                              \n
                            1. throw<\/code> \u548c throws<\/code>\uff1a<\/li>\n<\/ol>\n\n\n\n
                                \n
                              • throw<\/code><\/strong> \uff1a\u624b\u52a8\u629b\u51fa\u5f02\u5e38\u3002<\/li>\n<\/ul>\n\n\n\n
                                Java<\/span><\/path><\/path><\/svg><\/span>
                                if<\/span> (age < <\/span>18<\/span>) {<\/span><\/span>\n    <\/span>throw<\/span> <\/span>new<\/span> <\/span>IllegalArgumentException<\/span>(<\/span>"Age must be 18 or above"<\/span>);<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                  \n
                                • throws<\/code><\/strong> \uff1a\u5728\u65b9\u6cd5\u58f0\u660e\u4e2d\uff0c\u8868\u660e\u8be5\u65b9\u6cd5\u53ef\u80fd\u629b\u51fa\u67d0\u79cd\u7c7b\u578b\u7684\u5f02\u5e38\uff0c\u8c03\u7528\u8005\u9700\u8981\u5904\u7406\u8fd9\u4e9b\u5f02\u5e38\u3002<\/li>\n<\/ul>\n\n\n\n
                                  Java<\/span><\/path><\/path><\/svg><\/span>
                                  public<\/span> <\/span>void<\/span> <\/span>readFile<\/span>(<\/span>String<\/span> filePath) throws IOException {<\/span><\/span>\n    <\/span>FileReader<\/span> <\/span>file<\/span> = <\/span>new<\/span> <\/span>FileReader<\/span>(filePath);<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                  \u81ea\u5b9a\u4e49\u5f02\u5e38<\/h2>\n\n\n\n
                                  \u53ef\u4ee5\u901a\u8fc7\u6269\u5c55 Exception<\/code> \u7c7b\u6765\u81ea\u5b9a\u4e49\u5f02\u5e38\u3002<\/p>\n\n\n\n
                                  Java<\/span><\/path><\/path><\/svg><\/span>
                                  class<\/span> <\/span>MyCustomException<\/span> <\/span>extends<\/span> <\/span>Exception<\/span> {<\/span><\/span>\n    <\/span>public<\/span> <\/span>MyCustomException<\/span>(<\/span>String<\/span> <\/span>message<\/span>) {<\/span><\/span>\n        <\/span>super<\/span>(message);<\/span><\/span>\n    }<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                  \n\n\n\n
                                  \u6570\u636e\u7ed3\u6784<\/h1>\n\n\n\n
                                  Java \u63d0\u4f9b\u4e86\u591a\u79cd\u5e38\u89c1\u7684\u6570\u636e\u7ed3\u6784\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u7ed3\u6784\u53ca\u5176\u5e94\u7528\u3002<\/p>\n\n\n\n
                                  \u6570\u7ec4\uff08Array\uff09<\/h2>\n\n\n\n
                                  \u6570\u7ec4\u662f\u5b9a\u957f\u7684\u3001\u5b58\u50a8\u540c\u4e00\u79cd\u7c7b\u578b\u6570\u636e\u7684\u96c6\u5408\uff0c\u5143\u7d20\u901a\u8fc7\u7d22\u5f15\u8bbf\u95ee\u3002<\/p>\n\n\n\n
                                  Java<\/span><\/path><\/path><\/svg><\/span>
                                  int<\/span>[] <\/span>numbers<\/span> = <\/span>new<\/span> <\/span>int<\/span>[<\/span>5<\/span>];<\/span><\/span>\nnumbers[<\/span>0<\/span>] = <\/span>10<\/span>;<\/span><\/span>\nSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(numbers[<\/span>0<\/span>]);  <\/span>\/\/ \u8f93\u51fa 10<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                    \n
                                  • \u591a\u7ef4\u6570\u7ec4<\/strong> <\/li>\n<\/ul>\n\n\n\n
                                    Java<\/span><\/path><\/path><\/svg><\/span>
                                    int<\/span>[][] <\/span>matrix<\/span> = <\/span>new<\/span> <\/span>int<\/span>[<\/span>2<\/span>][<\/span>3<\/span>];<\/span><\/span>\nmatrix[<\/span>0<\/span>][<\/span>0<\/span>] = <\/span>1<\/span>;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                    \u94fe\u8868\uff08Linked List\uff09<\/h2>\n\n\n\n
                                    \u94fe\u8868\u662f\u52a8\u6001\u6570\u636e\u7ed3\u6784\uff0c\u7531\u8282\u70b9\u7ec4\u6210\uff0c\u6bcf\u4e2a\u8282\u70b9\u5305\u542b\u6570\u636e\u548c\u6307\u5411\u4e0b\u4e00\u4e2a\u8282\u70b9\u7684\u6307\u9488\u3002<\/p>\n\n\n\n
                                    Java<\/span><\/path><\/path><\/svg><\/span>
                                    class<\/span> <\/span>Node<\/span> {<\/span><\/span>\n    <\/span>int<\/span> <\/span>data<\/span>;<\/span><\/span>\n    <\/span>Node<\/span> <\/span>next<\/span>;<\/span><\/span>\n}<\/span><\/span>\n<\/span>\nclass<\/span> <\/span>LinkedList<\/span> {<\/span><\/span>\n    <\/span>Node<\/span> <\/span>head<\/span>;<\/span><\/span>\n<\/span>\n    <\/span>public<\/span> <\/span>void<\/span> <\/span>insert<\/span>(<\/span>int<\/span> <\/span>data<\/span>) {<\/span><\/span>\n        <\/span>Node<\/span> <\/span>newNode<\/span> = <\/span>new<\/span> <\/span>Node<\/span>();<\/span><\/span>\n        <\/span>newNode<\/span>.<\/span>data<\/span> = data;<\/span><\/span>\n        <\/span>newNode<\/span>.<\/span>next<\/span> = head;<\/span><\/span>\n        head = newNode;<\/span><\/span>\n    }<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                    \u961f\u5217\uff08Queue\uff09<\/h2>\n\n\n\n
                                    \u961f\u5217\u662f\u4e00\u79cd FIFO\uff08\u5148\u8fdb\u5148\u51fa\uff09\u7ed3\u6784\u3002Queue<\/code> \u63a5\u53e3\u5728 Java \u4e2d\u7531\u7c7b LinkedList<\/code> \u5b9e\u73b0\u3002<\/p>\n\n\n\n
                                    Java<\/span><\/path><\/path><\/svg><\/span>
                                    Queue<\/span><<\/span>Integer<\/span>> <\/span>queue<\/span> = <\/span>new<\/span> <\/span>LinkedList<\/span><>();<\/span><\/span>\nqueue<\/span>.<\/span>add<\/span>(<\/span>10<\/span>);<\/span><\/span>\nqueue<\/span>.<\/span>add<\/span>(<\/span>20<\/span>);<\/span><\/span>\nSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>queue<\/span>.<\/span>poll<\/span>());  <\/span>\/\/ \u8f93\u51fa 10<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                    \u6808\uff08Stack\uff09<\/h2>\n\n\n\n
                                    \u6808\u662f\u4e00\u79cd LIFO\uff08\u540e\u8fdb\u5148\u51fa\uff09\u7ed3\u6784\uff0cStack<\/code> \u7c7b\u53ef\u4ee5\u5b9e\u73b0\u6808\u7684\u529f\u80fd\u3002<\/p>\n\n\n\n
                                    Java<\/span><\/path><\/path><\/svg><\/span>
                                    Stack<\/span><<\/span>Integer<\/span>> <\/span>stack<\/span> = <\/span>new<\/span> <\/span>Stack<\/span><>();<\/span><\/span>\nstack<\/span>.<\/span>push<\/span>(<\/span>10<\/span>);<\/span><\/span>\nstack<\/span>.<\/span>push<\/span>(<\/span>20<\/span>);<\/span><\/span>\nSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>stack<\/span>.<\/span>pop<\/span>());  <\/span>\/\/ \u8f93\u51fa 20<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                    \u6811\uff08Tree\uff09<\/h2>\n\n\n\n
                                    \u6811\u662f\u4e00\u79cd\u5206\u5c42\u6570\u636e\u7ed3\u6784\uff0c\u7531\u8282\u70b9\u7ec4\u6210\u3002\u4e8c\u53c9\u6811\u662f\u6700\u5e38\u89c1\u7684\u6811\u7ed3\u6784\uff0c\u5176\u4e2d\u6bcf\u4e2a\u8282\u70b9\u6700\u591a\u6709\u4e24\u4e2a\u5b50\u8282\u70b9\u3002<\/p>\n\n\n\n
                                      \n
                                    • \u4e8c\u53c9\u6811\u7684\u5b9e\u73b0<\/strong> \uff1a<\/li>\n<\/ul>\n\n\n\n
                                      Java<\/span><\/path><\/path><\/svg><\/span>
                                      class<\/span> <\/span>TreeNode<\/span> {<\/span><\/span>\n    <\/span>int<\/span> <\/span>data<\/span>;<\/span><\/span>\n    <\/span>TreeNode<\/span> <\/span>left<\/span>, <\/span>right<\/span>;<\/span><\/span>\n<\/span>\n    <\/span>public<\/span> <\/span>TreeNode<\/span>(<\/span>int<\/span> <\/span>data<\/span>) {<\/span><\/span>\n        <\/span>this<\/span>.<\/span>data<\/span> = data;<\/span><\/span>\n        left = right = <\/span>null<\/span>;<\/span><\/span>\n    }<\/span><\/span>\n}<\/span><\/span>\n<\/span>\nclass<\/span> <\/span>BinaryTree<\/span> {<\/span><\/span>\n    <\/span>TreeNode<\/span> <\/span>root<\/span>;<\/span><\/span>\n<\/span>\n    <\/span>public<\/span> <\/span>void<\/span> <\/span>insert<\/span>(<\/span>int<\/span> <\/span>data<\/span>) {<\/span><\/span>\n        root = <\/span>insertRec<\/span>(root, data);<\/span><\/span>\n    }<\/span><\/span>\n<\/span>\n    <\/span>private<\/span> <\/span>TreeNode<\/span> <\/span>insertRec<\/span>(<\/span>TreeNode<\/span> <\/span>root<\/span>, <\/span>int<\/span> <\/span>data<\/span>) {<\/span><\/span>\n        <\/span>if<\/span> (root == <\/span>null<\/span>) {<\/span><\/span>\n            root = <\/span>new<\/span> <\/span>TreeNode<\/span>(data);<\/span><\/span>\n            <\/span>return<\/span> root;<\/span><\/span>\n        }<\/span><\/span>\n        <\/span>if<\/span> (data < <\/span>root<\/span>.<\/span>data<\/span>)<\/span><\/span>\n            <\/span>root<\/span>.<\/span>left<\/span> = <\/span>insertRec<\/span>(<\/span>root<\/span>.<\/span>left<\/span>, data);<\/span><\/span>\n        <\/span>else<\/span> <\/span>if<\/span> (data > <\/span>root<\/span>.<\/span>data<\/span>)<\/span><\/span>\n            <\/span>root<\/span>.<\/span>right<\/span> = <\/span>insertRec<\/span>(<\/span>root<\/span>.<\/span>right<\/span>, data);<\/span><\/span>\n<\/span>\n        <\/span>return<\/span> root;<\/span><\/span>\n    }<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                        \n
                                      • \u6811\u7684\u904d\u5386<\/strong> \uff1a\u53ef\u4ee5\u901a\u8fc7\u6df1\u5ea6\u4f18\u5148\u641c\u7d22\uff08DFS\uff09\u6216\u5e7f\u5ea6\u4f18\u5148\u641c\u7d22\uff08BFS\uff09\u6765\u904d\u5386\u6811\u3002<\/li>\n<\/ul>\n\n\n\n
                                        \u7c7b\u7684\u57fa\u7840\u77e5\u8bc6<\/h1>\n\n\n\n
                                        \u5b9a\u4e49<\/h2>\n\n\n\n
                                        Java \u662f\u4e00\u79cd\u9762\u5411\u5bf9\u8c61\u7684\u7f16\u7a0b\u8bed\u8a00\uff0c\u7c7b<\/strong> \u662f Java \u7684\u6838\u5fc3\u7ec4\u6210\u90e8\u5206\u3002\u7c7b\u662f\u5bf9\u8c61\u7684\u84dd\u56fe\u6216\u6a21\u677f\uff0c\u63cf\u8ff0\u5bf9\u8c61\u7684\u5c5e\u6027\uff08\u5b57\u6bb5\uff09\u548c\u884c\u4e3a\uff08\u65b9\u6cd5\uff09\u3002\u901a\u8fc7\u7c7b\u53ef\u4ee5\u521b\u5efa\u591a\u4e2a\u5bf9\u8c61\uff0c\u6bcf\u4e2a\u5bf9\u8c61\u62e5\u6709\u76f8\u540c\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002<\/p>\n\n\n\n
                                        \u7c7b\u7684\u7ec4\u6210<\/h2>\n\n\n\n
                                          \n
                                        • \u5b57\u6bb5\uff08Fields\uff09<\/strong> \u7c7b\u4e2d\u5b9a\u4e49\u7684\u53d8\u91cf\uff0c\u7528\u6765\u5b58\u50a8\u5bf9\u8c61\u7684\u72b6\u6001\u3002<\/li>\n<\/ul>\n\n\n\n
                                          Java<\/span><\/path><\/path><\/svg><\/span>
                                          class<\/span> <\/span>Person<\/span> {<\/span><\/span>\n    <\/span>String<\/span> <\/span>name<\/span>;  <\/span>\/\/ \u5b57\u6bb5<\/span><\/span>\n    <\/span>int<\/span> <\/span>age<\/span>;<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                            \n
                                          • \u65b9\u6cd5\uff08Methods\uff09<\/strong> \u5b9a\u4e49\u4e86\u5bf9\u8c61\u7684\u884c\u4e3a\u3002<\/li>\n<\/ul>\n\n\n\n
                                            Java<\/span><\/path><\/path><\/svg><\/span>
                                            class<\/span> <\/span>Person<\/span> {<\/span><\/span>\n    <\/span>String<\/span> <\/span>name<\/span>;<\/span><\/span>\n    <\/span>int<\/span> <\/span>age<\/span>;<\/span><\/span>\n<\/span>\n    <\/span>void<\/span> <\/span>greet<\/span>() {<\/span><\/span>\n        <\/span>System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>"Hello, my name is "<\/span> + name);<\/span><\/span>\n    }<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                              \n
                                            • \u6784\u9020\u65b9\u6cd5\uff08Constructors\uff09<\/strong> \u7528\u4e8e\u521b\u5efa\u5bf9\u8c61\u65f6\u521d\u59cb\u5316\u5bf9\u8c61\u7684\u72b6\u6001\u3002<\/li>\n<\/ul>\n\n\n\n
                                              Java<\/span><\/path><\/path><\/svg><\/span>
                                              class<\/span> <\/span>Person<\/span> {<\/span><\/span>\n    <\/span>String<\/span> <\/span>name<\/span>;<\/span><\/span>\n    <\/span>int<\/span> <\/span>age<\/span>;<\/span><\/span>\n<\/span>\n    <\/span>\/\/ \u6784\u9020\u65b9\u6cd5<\/span><\/span>\n    <\/span>Person<\/span>(<\/span>String<\/span> <\/span>name<\/span>, <\/span>int<\/span> <\/span>age<\/span>) {<\/span><\/span>\n        <\/span>this<\/span>.<\/span>name<\/span> = name;<\/span><\/span>\n        <\/span>this<\/span>.<\/span>age<\/span> = age;<\/span><\/span>\n    }<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                \n
                                              • \u8bbf\u95ee\u4fee\u9970\u7b26\uff08Access Modifiers\uff09<\/strong> \uff1a\u63a7\u5236\u7c7b\u548c\u6210\u5458\u7684\u53ef\u89c1\u6027\u3002<\/li>\n\n\n\n
                                              • public<\/code>\uff1a\u516c\u5f00\u8bbf\u95ee\uff0c\u4efb\u4f55\u5730\u65b9\u90fd\u53ef\u8bbf\u95ee\u3002<\/li>\n\n\n\n
                                              • private<\/code>\uff1a\u79c1\u6709\u8bbf\u95ee\uff0c\u4ec5\u7c7b\u5185\u90e8\u53ef\u4ee5\u8bbf\u95ee\u3002<\/li>\n\n\n\n
                                              • protected<\/code>\uff1a\u5141\u8bb8\u540c\u5305\u7684\u7c7b\u548c\u5b50\u7c7b\u8bbf\u95ee\u3002<\/li>\n\n\n\n
                                              • \u9ed8\u8ba4\uff08\u65e0\u4fee\u9970\u7b26\uff09\uff1a\u540c\u5305\u8bbf\u95ee\u3002<\/li>\n<\/ul>\n\n\n\n
                                                \n\n\n\n
                                                \u7c7b\u7684\u751f\u547d\u5468\u671f<\/h2>\n\n\n\n
                                                Java \u7c7b\u7684\u751f\u547d\u5468\u671f\u6db5\u76d6\u4e86\u7c7b\u4ece\u52a0\u8f7d\u5230\u5378\u8f7d\u7684\u6574\u4e2a\u8fc7\u7a0b\u3002\u751f\u547d\u5468\u671f\u7684\u4e3b\u8981\u9636\u6bb5\u5305\u62ec\uff1a<\/p>\n\n\n\n
                                                \u52a0\u8f7d\uff08Loading\uff09<\/h3>\n\n\n\n
                                                \u5f53 JVM \u9700\u8981\u4f7f\u7528\u67d0\u4e2a\u7c7b\u65f6\uff0c\u7c7b\u52a0\u8f7d\u5668\u4f1a\u4ece\u5b57\u8282\u7801\u6587\u4ef6\u4e2d\u8bfb\u53d6\u7c7b\u7684\u5b9a\u4e49\uff0c\u5e76\u5c06\u5176\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\u3002\u5728\u6b64\u9636\u6bb5\uff0c\u7c7b\u7684\u5b57\u8282\u7801\u4f1a\u88ab\u8bfb\u53d6\uff0c\u5e76\u751f\u6210\u4e00\u4e2a Class<\/code> \u5bf9\u8c61\uff08java.lang.Class<\/code>\uff09\uff0c\u8868\u793a\u7c7b\u7684\u8fd0\u884c\u65f6\u8868\u793a\u5f62\u5f0f\u3002<\/p>\n\n\n\n
                                                \u94fe\u63a5\uff08Linking\uff09<\/h3>\n\n\n\n
                                                \u52a0\u8f7d\u4e4b\u540e\uff0c\u7c7b\u8fdb\u5165\u94fe\u63a5\u9636\u6bb5\uff0c\u94fe\u63a5\u8fc7\u7a0b\u5206\u4e3a\u4ee5\u4e0b\u4e09\u6b65\uff1a<\/p>\n\n\n\n
                                                  \n
                                                • \u9a8c\u8bc1\uff08Verification\uff09<\/strong> \uff1a\u786e\u4fdd\u7c7b\u6587\u4ef6\u7684\u5b57\u8282\u7801\u7b26\u5408 JVM \u89c4\u8303\uff0c\u9632\u6b62\u6076\u610f\u4ee3\u7801\u7834\u574f\u3002<\/li>\n\n\n\n
                                                • \u51c6\u5907\uff08Preparation\uff09<\/strong> \uff1a\u4e3a\u7c7b\u4e2d\u7684\u9759\u6001\u53d8\u91cf\u5206\u914d\u5185\u5b58\uff0c\u5e76\u521d\u59cb\u5316\u4e3a\u9ed8\u8ba4\u503c\uff08\u5982 int<\/code> \u4e3a 0<\/code>\uff09\u3002<\/li>\n\n\n\n
                                                • \u89e3\u6790\uff08Resolution\uff09<\/strong> \uff1a\u5c06\u7c7b\u3001\u65b9\u6cd5\u3001\u5b57\u6bb5\u7684\u7b26\u53f7\u5f15\u7528\u89e3\u6790\u4e3a\u76f4\u63a5\u5f15\u7528\u3002<\/li>\n<\/ul>\n\n\n\n
                                                  \u521d\u59cb\u5316\uff08Initialization\uff09<\/h3>\n\n\n\n
                                                  \u6b64\u9636\u6bb5\u662f\u7c7b\u751f\u547d\u5468\u671f\u7684\u6700\u540e\u4e00\u6b65\uff0c\u4e5f\u662f\u6700\u5173\u952e\u7684\u4e00\u6b65\u3002\u7c7b\u7684\u9759\u6001\u53d8\u91cf\u88ab\u8d4b\u4e88\u5b9e\u9645\u7684\u503c\uff0c\u9759\u6001\u5757\u88ab\u6267\u884c\u3002<\/p>\n\n\n\n
                                                  Java<\/span><\/path><\/path><\/svg><\/span>
                                                  class<\/span> <\/span>Example<\/span> {<\/span><\/span>\n    <\/span>static<\/span> <\/span>int<\/span> <\/span>counter<\/span> = <\/span>10<\/span>;<\/span><\/span>\n<\/span>\n    <\/span>static<\/span> {<\/span><\/span>\n        <\/span>System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>"Class is being initialized"<\/span>);<\/span><\/span>\n    }<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                  \u4f7f\u7528\uff08Usage\uff09<\/h3>\n\n\n\n
                                                  \u5f53\u7c7b\u88ab\u521d\u59cb\u5316\u540e\uff0c\u5b83\u8fdb\u5165\u4f7f\u7528\u9636\u6bb5\u3002\u5728\u6b64\u9636\u6bb5\uff0cJVM \u53ef\u4ee5\u4f7f\u7528\u7c7b\u7684\u5bf9\u8c61\uff0c\u8c03\u7528\u7c7b\u7684\u9759\u6001\u65b9\u6cd5\u548c\u5b57\u6bb5\uff0c\u6267\u884c\u7a0b\u5e8f\u7684\u903b\u8f91\u3002<\/p>\n\n\n\n
                                                  \u5378\u8f7d\uff08Unloading\uff09<\/h3>\n\n\n\n
                                                  \u5f53\u7c7b\u4e0d\u518d\u88ab\u4f7f\u7528\u4e14\u6ca1\u6709\u4efb\u4f55\u6d3b\u52a8\u7684\u5f15\u7528\u65f6\uff0cJVM \u4f1a\u5c06\u7c7b\u4ece\u5185\u5b58\u4e2d\u5378\u8f7d\uff0c\u4ee5\u91ca\u653e\u8d44\u6e90\u3002\u7c7b\u7684\u5378\u8f7d\u901a\u5e38\u7531\u5783\u573e\u6536\u96c6\u5668\uff08Garbage Collector, GC\uff09\u8d1f\u8d23\u3002<\/p>\n\n\n\n
                                                  \n\n\n\n
                                                  \u7c7b\u7684\u52a0\u8f7d\u8fc7\u7a0b<\/h2>\n\n\n\n
                                                  Java \u4e2d\u7684\u7c7b\u52a0\u8f7d\u91c7\u7528 \u61d2\u52a0\u8f7d<\/strong> \u539f\u5219\uff0c\u53ea\u6709\u5f53\u4e00\u4e2a\u7c7b\u88ab\u771f\u6b63\u4f7f\u7528\u65f6\u624d\u4f1a\u88ab\u52a0\u8f7d\u3002\u7c7b\u7684\u52a0\u8f7d\u8fc7\u7a0b\u901a\u8fc7 \u7c7b\u52a0\u8f7d\u5668\uff08Class Loader\uff09<\/strong> \u6765\u5b8c\u6210\uff0cJVM \u81ea\u5e26\u4e00\u5957\u7c7b\u52a0\u8f7d\u673a\u5236\u3002<\/p>\n\n\n\n
                                                  \u7c7b\u52a0\u8f7d\u7684\u4e09\u6b65<\/h3>\n\n\n\n
                                                    \n
                                                  1. \u52a0\u8f7d\uff08Loading\uff09<\/strong> \uff1a
                                                    \u7c7b\u52a0\u8f7d\u5668\u4ece\u6587\u4ef6\u7cfb\u7edf\u6216\u7f51\u7edc\u4e2d\u8bfb\u53d6\u7c7b\u7684\u4e8c\u8fdb\u5236\u5b57\u8282\u7801\uff0c\u5e76\u5c06\u5176\u8f6c\u6362\u4e3a JVM \u53ef\u4ee5\u7406\u89e3\u7684\u5185\u5b58\u7ed3\u6784\uff0c\u5373 Class<\/code> \u5bf9\u8c61\u3002<\/li>\n\n\n\n
                                                  2. \u9a8c\u8bc1\uff08Verification\uff09<\/strong> \uff1a
                                                    JVM \u9a8c\u8bc1\u52a0\u8f7d\u7684\u5b57\u8282\u7801\u662f\u5426\u7b26\u5408 Java \u8bed\u8a00\u89c4\u8303\u548c\u5b89\u5168\u7ea6\u675f\u3002<\/li>\n\n\n\n
                                                  3. \u521d\u59cb\u5316\uff08Initialization\uff09<\/strong> \uff1a
                                                    \u6267\u884c\u7c7b\u7684\u9759\u6001\u521d\u59cb\u5316\u5757\u548c\u9759\u6001\u53d8\u91cf\u8d4b\u503c\u3002<\/li>\n<\/ol>\n\n\n\n
                                                    \u7c7b\u52a0\u8f7d\u5668\u7684\u79cd\u7c7b<\/h3>\n\n\n\n
                                                    Java \u4f7f\u7528\u4e86\u5206\u5c42\u6b21\u7684\u7c7b\u52a0\u8f7d\u5668\u4f53\u7cfb\uff0c\u4e3b\u8981\u5305\u62ec\u4ee5\u4e0b\u51e0\u79cd\u7c7b\u52a0\u8f7d\u5668\uff1a<\/p>\n\n\n\n
                                                      \n
                                                    • \u542f\u52a8\u7c7b\u52a0\u8f7d\u5668\uff08Bootstrap ClassLoader\uff09<\/strong> \uff1a\u6700\u9876\u5c42\u7684\u7c7b\u52a0\u8f7d\u5668\uff0c\u52a0\u8f7d Java \u7684\u6838\u5fc3\u7c7b\u5e93\uff08\u5982 rt.jar<\/code> \u4e2d\u7684\u7c7b\uff09\u3002<\/li>\n\n\n\n
                                                    • \u6269\u5c55\u7c7b\u52a0\u8f7d\u5668\uff08Extension ClassLoader\uff09<\/strong> \uff1a\u52a0\u8f7d lib\/ext<\/code> \u76ee\u5f55\u4e0b\u7684\u6269\u5c55\u7c7b\u5e93\u3002<\/li>\n\n\n\n
                                                    • \u5e94\u7528\u7c7b\u52a0\u8f7d\u5668\uff08Application ClassLoader\uff09<\/strong> \uff1a\u8d1f\u8d23\u52a0\u8f7d\u5e94\u7528\u7a0b\u5e8f\u7684\u7c7b\u8def\u5f84\uff08classpath<\/code>\uff09\u4e2d\u7684\u7c7b\u3002<\/li>\n<\/ul>\n\n\n\n
                                                      \n\n\n\n
                                                      \u53cc\u4eb2\u59d4\u6d3e\u6a21\u578b<\/h3>\n\n\n\n
                                                      \u5b9a\u4e49<\/h4>\n\n\n\n
                                                      \u53cc\u4eb2\u59d4\u6d3e\u6a21\u578b<\/strong> \u662f Java \u7c7b\u52a0\u8f7d\u673a\u5236\u7684\u91cd\u8981\u7279\u6027\uff0c\u5b83\u89c4\u5b9a\u7c7b\u52a0\u8f7d\u5668\u5728\u52a0\u8f7d\u7c7b\u65f6\uff0c\u5fc5\u987b\u5148\u5c06\u8bf7\u6c42\u59d4\u6d3e\u7ed9\u7236\u7c7b\u52a0\u8f7d\u5668\u3002\u5982\u679c\u7236\u7c7b\u52a0\u8f7d\u5668\u65e0\u6cd5\u52a0\u8f7d\u8be5\u7c7b\uff0c\u624d\u7531\u5f53\u524d\u7c7b\u52a0\u8f7d\u5668\u5c1d\u8bd5\u52a0\u8f7d\u3002\u53cc\u4eb2\u59d4\u6d3e\u6a21\u578b\u7684\u6838\u5fc3\u601d\u60f3\u662f\u9632\u6b62\u7c7b\u7684\u91cd\u590d\u52a0\u8f7d\uff0c\u786e\u4fdd Java \u7684\u6838\u5fc3\u7c7b\u4e0d\u4f1a\u88ab\u7be1\u6539\u3002<\/p>\n\n\n\n
                                                      \u8fc7\u7a0b<\/h4>\n\n\n\n
                                                        \n
                                                      1. \u5f53\u67d0\u4e2a\u7c7b\u52a0\u8f7d\u5668\u9700\u8981\u52a0\u8f7d\u4e00\u4e2a\u7c7b\u65f6\uff0c\u5b83\u9996\u5148\u5c06\u52a0\u8f7d\u8bf7\u6c42\u59d4\u6d3e\u7ed9\u5b83\u7684\u7236\u7c7b\u52a0\u8f7d\u5668\u3002<\/li>\n\n\n\n
                                                      2. \u7236\u7c7b\u52a0\u8f7d\u5668\u4f9d\u6b21\u5411\u4e0a\u59d4\u6d3e\uff0c\u76f4\u5230\u9876\u5c42\u7684\u542f\u52a8\u7c7b\u52a0\u8f7d\u5668\u3002<\/li>\n\n\n\n
                                                      3. \u5982\u679c\u7236\u7c7b\u52a0\u8f7d\u5668\u53ef\u4ee5\u6210\u529f\u52a0\u8f7d\u8be5\u7c7b\uff0c\u5219\u8fd4\u56de\u52a0\u8f7d\u7684\u7c7b\u3002<\/li>\n\n\n\n
                                                      4. \u5982\u679c\u7236\u7c7b\u52a0\u8f7d\u5668\u65e0\u6cd5\u52a0\u8f7d\uff0c\u5219\u5f53\u524d\u7c7b\u52a0\u8f7d\u5668\u5c1d\u8bd5\u81ea\u5df1\u52a0\u8f7d\u3002<\/li>\n<\/ol>\n\n\n\n
                                                        \u4f18\u70b9<\/h4>\n\n\n\n
                                                          \n
                                                        • \u5b89\u5168\u6027<\/strong> \uff1a\u901a\u8fc7\u53cc\u4eb2\u59d4\u6d3e\u6a21\u578b\uff0c\u6838\u5fc3\u7c7b\u5e93\uff08\u5982 java.lang.String<\/code>\uff09\u53ea\u80fd\u7531\u542f\u52a8\u7c7b\u52a0\u8f7d\u5668\u52a0\u8f7d\uff0c\u907f\u514d\u4e86\u7c7b\u88ab\u7be1\u6539\u7684\u98ce\u9669\u3002<\/li>\n\n\n\n
                                                        • \u6027\u80fd\u4f18\u5316<\/strong> \uff1a\u7c7b\u52a0\u8f7d\u5668\u907f\u514d\u4e86\u91cd\u590d\u52a0\u8f7d\u540c\u4e00\u4e2a\u7c7b\u7684\u5f00\u9500\u3002<\/li>\n<\/ul>\n\n\n\n
                                                          \u793a\u4f8b<\/h4>\n\n\n\n
                                                          \u6bd4\u5982\uff0c\u5f53\u6211\u4eec\u5c1d\u8bd5\u52a0\u8f7d java.lang.String<\/code> \u7c7b\u65f6\uff0c\u5e94\u7528\u7c7b\u52a0\u8f7d\u5668\u4f1a\u5148\u5c06\u8bf7\u6c42\u59d4\u6d3e\u7ed9\u6269\u5c55\u7c7b\u52a0\u8f7d\u5668\uff0c\u6269\u5c55\u7c7b\u52a0\u8f7d\u5668\u518d\u59d4\u6d3e\u7ed9\u542f\u52a8\u7c7b\u52a0\u8f7d\u5668\uff0c\u6700\u540e\u7531\u542f\u52a8\u7c7b\u52a0\u8f7d\u5668\u52a0\u8f7d String<\/code> \u7c7b\u3002<\/p>\n\n\n\n
                                                          \u7279\u6b8a\u60c5\u51b5<\/h4>\n\n\n\n
                                                          \u6709\u65f6\u7c7b\u52a0\u8f7d\u5668\u9700\u8981\u6253\u7834\u53cc\u4eb2\u59d4\u6d3e\u6a21\u578b\uff0c\u8fd9\u79cd\u60c5\u51b5\u901a\u5e38\u53d1\u751f\u5728 \u81ea\u5b9a\u4e49\u7c7b\u52a0\u8f7d\u5668<\/strong> \uff08\u5982 Web \u5bb9\u5668\u7684\u7c7b\u52a0\u8f7d\u5668\uff09\u4e2d\u3002<\/p>\n\n\n\n
                                                          \n\n\n\n
                                                          \u603b\u7ed3<\/h3>\n\n\n\n
                                                          \u7c7b\u7ba1\u7406\u673a\u5236<\/strong> \u6d89\u53ca\u5230 Java \u4e2d\u7c7b\u7684\u52a0\u8f7d\u4e0e\u7ba1\u7406\uff0c\u5305\u62ec\u4ee5\u4e0b\u51e0\u90e8\u5206\uff1a<\/p>\n\n\n\n
                                                            \n
                                                          1. \u7c7b\u7684\u57fa\u7840\u77e5\u8bc6<\/strong> \uff1a\u7c7b\u662f\u5bf9\u8c61\u7684\u6a21\u677f\uff0c\u5b9a\u4e49\u4e86\u5b57\u6bb5\u548c\u65b9\u6cd5\uff0c\u901a\u8fc7\u7c7b\u53ef\u4ee5\u521b\u5efa\u591a\u4e2a\u5bf9\u8c61\u3002<\/li>\n\n\n\n
                                                          2. \u7c7b\u7684\u751f\u547d\u5468\u671f<\/strong> \uff1a\u4ece\u7c7b\u7684\u52a0\u8f7d\u3001\u94fe\u63a5\u3001\u521d\u59cb\u5316\u3001\u4f7f\u7528\u5230\u5378\u8f7d\uff0c\u6db5\u76d6\u7c7b\u5728 JVM \u4e2d\u7684\u6574\u4e2a\u751f\u5b58\u8fc7\u7a0b\u3002<\/li>\n\n\n\n
                                                          3. \u7c7b\u52a0\u8f7d\u8fc7\u7a0b<\/strong> \uff1a\u7c7b\u52a0\u8f7d\u5668\u8d1f\u8d23\u5c06\u7c7b\u7684\u5b57\u8282\u7801\u52a0\u8f7d\u5230 JVM \u4e2d\u5e76\u9a8c\u8bc1\u3001\u51c6\u5907\u548c\u521d\u59cb\u5316\u3002<\/li>\n\n\n\n
                                                          4. \u53cc\u4eb2\u59d4\u6d3e\u6a21\u578b<\/strong> \uff1a\u7c7b\u52a0\u8f7d\u5668\u91c7\u7528\u9010\u7ea7\u59d4\u6d3e\u7684\u65b9\u5f0f\uff0c\u786e\u4fdd\u6838\u5fc3\u7c7b\u5e93\u7684\u5b89\u5168\u6027\u3002<\/li>\n<\/ol>\n\n\n\n
                                                            \n\n\n\n
                                                            \u5e38\u89c1\u7c7b\u5e93<\/h1>\n\n\n\n
                                                            java.lang<\/code> <\/h2>\n\n\n\n
                                                            java.lang<\/code> \u5305\u542b\u4e86 Java \u6838\u5fc3\u8bed\u8a00\u7684\u57fa\u7840\u7c7b\u3002\u8fd9\u4e2a\u5305\u4f1a\u81ea\u52a8\u5bfc\u5165\uff0c\u6240\u4ee5\u6211\u4eec\u901a\u5e38\u4e0d\u9700\u8981\u663e\u5f0f\u5bfc\u5165<\/p>\n\n\n\n
                                                            \u4e3b\u8981\u7c7b\u548c\u529f\u80fd<\/p>\n\n\n\n
                                                              \n
                                                            • Object<\/code><\/strong> :<\/li>\n\n\n\n
                                                            • \u529f\u80fd<\/strong> : \u6240\u6709\u7c7b\u7684\u57fa\u7c7b\uff0c\u63d0\u4f9b\u4e86\u57fa\u7840\u65b9\u6cd5\u5982 equals()<\/code>\u3001hashCode()<\/code>\u3001toString()<\/code>\u3001clone()<\/code>\u3001finalize()<\/code> \u7b49\u3002\u8fd9\u4e9b\u65b9\u6cd5\u53ef\u4ee5\u88ab\u5b50\u7c7b\u91cd\u5199\uff0c\u4ee5\u5b9e\u73b0\u7c7b\u7684\u6bd4\u8f83\u3001\u54c8\u5e0c\u8ba1\u7b97\u3001\u5bf9\u8c61\u5b57\u7b26\u4e32\u8868\u793a\u7b49\u529f\u80fd\u3002<\/li>\n\n\n\n
                                                            • \u7528\u6cd5\u793a\u4f8b<\/strong> :<\/li>\n<\/ul>\n\n\n\n
                                                              Java<\/span><\/path><\/path><\/svg><\/span>
                                                              class<\/span> <\/span>Person<\/span> {<\/span><\/span>\n    <\/span>String<\/span> <\/span>name<\/span>;<\/span><\/span>\n    <\/span>int<\/span> <\/span>age<\/span>;<\/span><\/span>\n<\/span>\n    @<\/span>Override<\/span><\/span>\n    <\/span>public<\/span> <\/span>boolean<\/span> <\/span>equals<\/span>(<\/span>Object<\/span> <\/span>obj<\/span>) {<\/span><\/span>\n        <\/span>if<\/span> (<\/span>this<\/span> == obj) <\/span>return<\/span> <\/span>true<\/span>;<\/span><\/span>\n        <\/span>if<\/span> (obj == <\/span>null<\/span> || <\/span>getClass<\/span>() != <\/span>obj<\/span>.<\/span>getClass<\/span>()) <\/span>return<\/span> <\/span>false<\/span>;<\/span><\/span>\n        <\/span>Person<\/span> <\/span>person<\/span> = (Person) obj;<\/span><\/span>\n        <\/span>return<\/span> age == <\/span>person<\/span>.<\/span>age<\/span> && <\/span>Objects<\/span>.<\/span>equals<\/span>(name, <\/span>person<\/span>.<\/span>name<\/span>);<\/span><\/span>\n    }<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                \n
                                                              • String<\/code><\/strong> :<\/li>\n\n\n\n
                                                              • \u529f\u80fd<\/strong> : \u5904\u7406\u5b57\u7b26\u4e32\u7684\u4e0d\u53ef\u53d8\u7c7b\uff0c\u652f\u6301\u5404\u79cd\u5b57\u7b26\u4e32\u64cd\u4f5c\uff0c\u5982\u62fc\u63a5\u3001\u67e5\u627e\u3001\u66ff\u6362\u3001\u62c6\u5206\u7b49\u3002<\/li>\n\n\n\n
                                                              • \u5e38\u7528\u65b9\u6cd5<\/strong> : length()<\/code>\u3001substring()<\/code>\u3001indexOf()<\/code>\u3001replace()<\/code>\u3001split()<\/code>\u3001toLowerCase()<\/code>\u3001toUpperCase()<\/code>\u3002<\/li>\n\n\n\n
                                                              • \u7528\u6cd5\u793a\u4f8b<\/strong> :<\/li>\n<\/ul>\n\n\n\n
                                                                Java<\/span><\/path><\/path><\/svg><\/span>
                                                                String<\/span> <\/span>text<\/span> = <\/span>"Hello, World!"<\/span>;<\/span><\/span>\nString<\/span> <\/span>upperCaseText<\/span> = <\/span>text<\/span>.<\/span>toUpperCase<\/span>();  <\/span>\/\/ \u8f6c\u4e3a\u5927\u5199<\/span><\/span>\nint<\/span> <\/span>position<\/span> = <\/span>text<\/span>.<\/span>indexOf<\/span>(<\/span>"World"<\/span>);  <\/span>\/\/ \u67e5\u627e\u5b50\u5b57\u7b26\u4e32\u7684\u4f4d\u7f6e<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                  \n
                                                                • Math<\/code><\/strong> :<\/li>\n\n\n\n
                                                                • \u529f\u80fd<\/strong> : \u63d0\u4f9b\u5e38\u7528\u7684\u6570\u5b66\u51fd\u6570\uff0c\u5982\u53d6\u6574\u3001\u53d6\u7edd\u5bf9\u503c\u3001\u8ba1\u7b97\u5e42\u6b21\u3001\u4e09\u89d2\u51fd\u6570\u7b49\u3002<\/li>\n\n\n\n
                                                                • \u5e38\u7528\u65b9\u6cd5<\/strong> : abs()<\/code>\u3001pow()<\/code>\u3001sqrt()<\/code>\u3001sin()<\/code>\u3001cos()<\/code>\u3001random()<\/code>\u3002<\/li>\n\n\n\n
                                                                • \u7528\u6cd5\u793a\u4f8b<\/strong> :<\/li>\n<\/ul>\n\n\n\n
                                                                  Java<\/span><\/path><\/path><\/svg><\/span>
                                                                  double<\/span> <\/span>squareRoot<\/span> = <\/span>Math<\/span>.<\/span>sqrt<\/span>(<\/span>16<\/span>);  <\/span>\/\/ \u8ba1\u7b97\u5e73\u65b9\u6839<\/span><\/span>\ndouble<\/span> <\/span>randomNumber<\/span> = <\/span>Math<\/span>.<\/span>random<\/span>();  <\/span>\/\/ \u751f\u6210 0 \u5230 1 \u4e4b\u95f4\u7684\u968f\u673a\u6570<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                    \n
                                                                  • Thread<\/code> \u548c Runnable<\/code><\/strong> :<\/li>\n\n\n\n
                                                                  • \u529f\u80fd<\/strong> : \u7528\u4e8e\u591a\u7ebf\u7a0b\u7f16\u7a0b\uff0cThread<\/code> \u7c7b\u7528\u4e8e\u521b\u5efa\u7ebf\u7a0b\uff0cRunnable<\/code> \u63a5\u53e3\u7528\u4e8e\u5b9a\u4e49\u4efb\u52a1\uff0c\u5141\u8bb8\u5e76\u53d1\u6267\u884c\u4efb\u52a1\u3002<\/li>\n\n\n\n
                                                                  • \u5e38\u7528\u65b9\u6cd5<\/strong> : start()<\/code>\u3001run()<\/code>\u3001sleep()<\/code>\u3001join()<\/code>\u3001interrupt()<\/code>\u3002<\/li>\n\n\n\n
                                                                  • \u7528\u6cd5\u793a\u4f8b<\/strong> :<\/li>\n<\/ul>\n\n\n\n
                                                                    Java<\/span><\/path><\/path><\/svg><\/span>
                                                                    class<\/span> <\/span>MyTask<\/span> <\/span>implements<\/span> <\/span>Runnable<\/span> {<\/span><\/span>\n    <\/span>public<\/span> <\/span>void<\/span> <\/span>run<\/span>() {<\/span><\/span>\n        <\/span>System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>"Task is running"<\/span>);<\/span><\/span>\n    }<\/span><\/span>\n}<\/span><\/span>\n<\/span>\nThread<\/span> <\/span>thread<\/span> = <\/span>new<\/span> <\/span>Thread<\/span>(<\/span>new<\/span> <\/span>MyTask<\/span>());<\/span><\/span>\nthread<\/span>.<\/span>start<\/span>();  <\/span>\/\/ \u542f\u52a8\u7ebf\u7a0b<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                      \n
                                                                    • Exception<\/code> \u548c Error<\/code><\/strong> :<\/li>\n\n\n\n
                                                                    • \u529f\u80fd<\/strong> : \u7528\u4e8e\u5f02\u5e38\u5904\u7406\uff0cException<\/code> \u4ee3\u8868\u53ef\u5904\u7406\u7684\u5f02\u5e38\uff0cError<\/code> \u4ee3\u8868\u4e0d\u53ef\u6062\u590d\u7684\u9519\u8bef\u3002\u901a\u8fc7 try-catch-finally<\/code> \u5757\u5904\u7406\u5f02\u5e38\u3002<\/li>\n\n\n\n
                                                                    • \u7528\u6cd5\u793a\u4f8b<\/strong> :<\/li>\n<\/ul>\n\n\n\n
                                                                      Java<\/span><\/path><\/path><\/svg><\/span>
                                                                      try<\/span> {<\/span><\/span>\n    <\/span>int<\/span> <\/span>result<\/span> = <\/span>10<\/span> \/ <\/span>0<\/span>;  <\/span>\/\/ \u53ef\u80fd\u629b\u51fa ArithmeticException<\/span><\/span>\n} <\/span>catch<\/span> (<\/span>ArithmeticException<\/span> <\/span>e<\/span>) {<\/span><\/span>\n    <\/span>System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>"Cannot divide by zero"<\/span>);<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                      java.io<\/code>  <\/h2>\n\n\n\n
                                                                      java.io<\/code> \u63d0\u4f9b\u4e86\u8f93\u5165\u8f93\u51fa\uff08I\/O\uff09\u64cd\u4f5c\u7684\u7c7b\uff0c\u4e3b\u8981\u7528\u4e8e\u5904\u7406\u6587\u4ef6\u3001\u6570\u636e\u6d41\u3001\u5bf9\u8c61\u5e8f\u5217\u5316\u7b49\u3002<\/p>\n\n\n\n
                                                                      \u4e3b\u8981\u7c7b\u548c\u529f\u80fd<\/p>\n\n\n\n
                                                                        \n
                                                                      • File<\/code><\/strong> :<\/li>\n\n\n\n
                                                                      • \u529f\u80fd<\/strong> : \u4ee3\u8868\u6587\u4ef6\u548c\u76ee\u5f55\uff0c\u63d0\u4f9b\u4e86\u6587\u4ef6\u548c\u76ee\u5f55\u7684\u521b\u5efa\u3001\u5220\u9664\u3001\u91cd\u547d\u540d\u3001\u5c5e\u6027\u67e5\u8be2\u7b49\u64cd\u4f5c\u3002<\/li>\n\n\n\n
                                                                      • \u5e38\u7528\u65b9\u6cd5<\/strong> : exists()<\/code>\u3001createNewFile()<\/code>\u3001delete()<\/code>\u3001renameTo()<\/code>\u3001listFiles()<\/code>\u3002<\/li>\n\n\n\n
                                                                      • \u7528\u6cd5\u793a\u4f8b<\/strong> :<\/li>\n<\/ul>\n\n\n\n
                                                                        Java<\/span><\/path><\/path><\/svg><\/span>
                                                                        File<\/span> <\/span>file<\/span> = <\/span>new<\/span> <\/span>File<\/span>(<\/span>"example.txt"<\/span>);<\/span><\/span>\nif<\/span> (!<\/span>file<\/span>.<\/span>exists<\/span>()) {<\/span><\/span>\n    <\/span>file<\/span>.<\/span>createNewFile<\/span>();  <\/span>\/\/ \u521b\u5efa\u65b0\u6587\u4ef6<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                          \n
                                                                        • FileInputStream<\/code> \u548c FileOutputStream<\/code><\/strong> :<\/li>\n\n\n\n
                                                                        • \u529f\u80fd<\/strong> : \u7528\u4e8e\u5b57\u8282\u6d41\u7684\u8f93\u5165\u8f93\u51fa\u64cd\u4f5c\uff0c\u9002\u5408\u8bfb\u53d6\u548c\u5199\u5165\u4e8c\u8fdb\u5236\u6587\u4ef6\u3002<\/li>\n\n\n\n
                                                                        • \u5e38\u7528\u65b9\u6cd5<\/strong> : read()<\/code>\u3001write()<\/code>\u3001close()<\/code>\u3002<\/li>\n\n\n\n
                                                                        • \u7528\u6cd5\u793a\u4f8b<\/strong> :<\/li>\n<\/ul>\n\n\n\n
                                                                          Java<\/span><\/path><\/path><\/svg><\/span>
                                                                          FileInputStream<\/span> <\/span>fis<\/span> = <\/span>new<\/span> <\/span>FileInputStream<\/span>(<\/span>"example.txt"<\/span>);<\/span><\/span>\nint<\/span> <\/span>content<\/span>;<\/span><\/span>\nwhile<\/span> ((content = <\/span>fis<\/span>.<\/span>read<\/span>()) != -<\/span>1<\/span>) {<\/span><\/span>\n    <\/span>System<\/span>.<\/span>out<\/span>.<\/span>print<\/span>((<\/span>char<\/span>) content);<\/span><\/span>\n}<\/span><\/span>\nfis<\/span>.<\/span>close<\/span>();<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                            \n
                                                                          • BufferedReader<\/code> \u548c BufferedWriter<\/code><\/strong> :<\/li>\n\n\n\n
                                                                          • \u529f\u80fd<\/strong> : \u5904\u7406\u5b57\u7b26\u6d41\uff0c\u5e26\u6709\u7f13\u5b58\u529f\u80fd\uff0c\u9002\u5408\u5904\u7406\u6587\u672c\u6587\u4ef6\uff0c\u80fd\u63d0\u5347 I\/O \u6548\u7387\u3002<\/li>\n\n\n\n
                                                                          • \u5e38\u7528\u65b9\u6cd5<\/strong> : readLine()<\/code>\u3001write()<\/code>\u3001flush()<\/code>\u3001close()<\/code>\u3002<\/li>\n\n\n\n
                                                                          • \u7528\u6cd5\u793a\u4f8b<\/strong> :<\/li>\n<\/ul>\n\n\n\n
                                                                            Java<\/span><\/path><\/path><\/svg><\/span>
                                                                            BufferedReader<\/span> <\/span>reader<\/span> = <\/span>new<\/span> <\/span>BufferedReader<\/span>(<\/span>new<\/span> <\/span>FileReader<\/span>(<\/span>"example.txt"<\/span>));<\/span><\/span>\nString<\/span> <\/span>line<\/span>;<\/span><\/span>\nwhile<\/span> ((line = <\/span>reader<\/span>.<\/span>readLine<\/span>()) != <\/span>null<\/span>) {<\/span><\/span>\n    <\/span>System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(line);<\/span><\/span>\n}<\/span><\/span>\nreader<\/span>.<\/span>close<\/span>();<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                              \n
                                                                            • ObjectInputStream<\/code> \u548c ObjectOutputStream<\/code><\/strong> :<\/li>\n\n\n\n
                                                                            • \u529f\u80fd<\/strong> : \u7528\u4e8e\u5bf9\u8c61\u7684\u5e8f\u5217\u5316\u548c\u53cd\u5e8f\u5217\u5316\uff0c\u9002\u5408\u5c06\u5bf9\u8c61\u5b58\u50a8\u5230\u6587\u4ef6\u6216\u901a\u8fc7\u7f51\u7edc\u4f20\u8f93\u3002<\/li>\n\n\n\n
                                                                            • \u5e38\u7528\u65b9\u6cd5<\/strong> : writeObject()<\/code>\u3001readObject()<\/code>\u3002<\/li>\n\n\n\n
                                                                            • \u7528\u6cd5\u793a\u4f8b<\/strong> :<\/li>\n<\/ul>\n\n\n\n
                                                                              Java<\/span><\/path><\/path><\/svg><\/span>
                                                                              ObjectOutputStream<\/span> <\/span>oos<\/span> = <\/span>new<\/span> <\/span>ObjectOutputStream<\/span>(<\/span>new<\/span> <\/span>FileOutputStream<\/span>(<\/span>"object.dat"<\/span>));<\/span><\/span>\noos<\/span>.<\/span>writeObject<\/span>(<\/span>new<\/span> <\/span>Person<\/span>(<\/span>"John"<\/span>, <\/span>30<\/span>));  <\/span>\/\/ \u5e8f\u5217\u5316\u5bf9\u8c61<\/span><\/span>\noos<\/span>.<\/span>close<\/span>();<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                              java.net<\/code>  <\/h2>\n\n\n\n
                                                                              java.net<\/code> \u63d0\u4f9b\u4e86\u7f51\u7edc\u901a\u4fe1\u7684\u76f8\u5173\u7c7b\uff0c\u652f\u6301\u901a\u8fc7 TCP\/IP \u534f\u8bae\u8fdb\u884c\u6570\u636e\u4f20\u8f93\u3002<\/p>\n\n\n\n
                                                                              \u4e3b\u8981\u7c7b\u548c\u529f\u80fd<\/p>\n\n\n\n
                                                                                \n
                                                                              • URL<\/code><\/strong> :<\/li>\n\n\n\n
                                                                              • \u529f\u80fd<\/strong> : \u4ee3\u8868\u7f51\u7edc\u8d44\u6e90\u7684\u5730\u5740\uff0c\u53ef\u4ee5\u901a\u8fc7 URL \u8bbf\u95ee\u7f51\u7edc\u8d44\u6e90\u3002<\/li>\n\n\n\n
                                                                              • \u5e38\u7528\u65b9\u6cd5<\/strong> : openConnection()<\/code>\u3001getHost()<\/code>\u3001getProtocol()<\/code>\u3002<\/li>\n\n\n\n
                                                                              • \u7528\u6cd5\u793a\u4f8b<\/strong> :<\/li>\n<\/ul>\n\n\n\n
                                                                                Java<\/span><\/path><\/path><\/svg><\/span>
                                                                                URL<\/span> <\/span>url<\/span> = <\/span>new<\/span> <\/span>URL<\/span>(<\/span>"https:\/\/www.example.com"<\/span>);<\/span><\/span>\nSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>url<\/span>.<\/span>getHost<\/span>());  <\/span>\/\/ \u8f93\u51fa\u4e3b\u673a\u540d<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                                  \n
                                                                                • URLConnection<\/code><\/strong> :<\/li>\n\n\n\n
                                                                                • \u529f\u80fd<\/strong> : \u7528\u4e8e\u8bbf\u95ee URL \u8d44\u6e90\uff0c\u652f\u6301\u8bfb\u53d6\u548c\u5199\u5165\u7f51\u7edc\u6570\u636e\u3002<\/li>\n\n\n\n
                                                                                • \u5e38\u7528\u65b9\u6cd5<\/strong> : connect()<\/code>\u3001getInputStream()<\/code>\u3001getOutputStream()<\/code>\u3002<\/li>\n\n\n\n
                                                                                • \u7528\u6cd5\u793a\u4f8b<\/strong> :<\/li>\n<\/ul>\n\n\n\n
                                                                                  Java<\/span><\/path><\/path><\/svg><\/span>
                                                                                  URL<\/span> <\/span>url<\/span> = <\/span>new<\/span> <\/span>URL<\/span>(<\/span>"https:\/\/www.example.com"<\/span>);<\/span><\/span>\nURLConnection<\/span> <\/span>connection<\/span> = <\/span>url<\/span>.<\/span>openConnection<\/span>();<\/span><\/span>\nconnection<\/span>.<\/span>connect<\/span>();<\/span><\/span>\nBufferedReader<\/span> <\/span>in<\/span> = <\/span>new<\/span> <\/span>BufferedReader<\/span>(<\/span>new<\/span> <\/span>InputStreamReader<\/span>(<\/span>connection<\/span>.<\/span>getInputStream<\/span>()));<\/span><\/span>\nString<\/span> <\/span>inputLine<\/span>;<\/span><\/span>\nwhile<\/span> ((inputLine = <\/span>in<\/span>.<\/span>readLine<\/span>()) != <\/span>null<\/span>) {<\/span><\/span>\n    <\/span>System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(inputLine);<\/span><\/span>\n}<\/span><\/span>\nin<\/span>.<\/span>close<\/span>();<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                                    \n
                                                                                  • Socket<\/code> \u548c ServerSocket<\/code><\/strong> :<\/li>\n\n\n\n
                                                                                  • \u529f\u80fd<\/strong> : \u7528\u4e8e TCP \u7f51\u7edc\u901a\u4fe1\u3002Socket<\/code> \u8d1f\u8d23\u5ba2\u6237\u7aef\u7684\u7f51\u7edc\u8fde\u63a5\uff0cServerSocket<\/code> \u7528\u4e8e\u670d\u52a1\u5668\u7aef\u76d1\u542c\u8fde\u63a5\u3002<\/li>\n\n\n\n
                                                                                  • \u5e38\u7528\u65b9\u6cd5<\/strong> : accept()<\/code>\u3001connect()<\/code>\u3001getInputStream()<\/code>\u3001getOutputStream()<\/code>\u3002<\/li>\n\n\n\n
                                                                                  • \u7528\u6cd5\u793a\u4f8b<\/strong> :<\/li>\n<\/ul>\n\n\n\n
                                                                                    Java<\/span><\/path><\/path><\/svg><\/span>
                                                                                    \/\/ \u670d\u52a1\u5668\u7aef<\/span><\/span>\nServerSocket<\/span> <\/span>serverSocket<\/span> = <\/span>new<\/span> <\/span>ServerSocket<\/span>(<\/span>8080<\/span>);<\/span><\/span>\nSocket<\/span> <\/span>clientSocket<\/span> = <\/span>serverSocket<\/span>.<\/span>accept<\/span>();  <\/span>\/\/ \u7b49\u5f85\u5ba2\u6237\u7aef\u8fde\u63a5<\/span><\/span>\nPrintWriter<\/span> <\/span>out<\/span> = <\/span>new<\/span> <\/span>PrintWriter<\/span>(<\/span>clientSocket<\/span>.<\/span>getOutputStream<\/span>(), <\/span>true<\/span>);<\/span><\/span>\nout<\/span>.<\/span>println<\/span>(<\/span>"Hello, Client!"<\/span>);<\/span><\/span>\nclientSocket<\/span>.<\/span>close<\/span>();<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                                    java.util<\/code> <\/h2>\n\n\n\n
                                                                                     java.util<\/code> \u662f Java \u4e2d\u975e\u5e38\u91cd\u8981\u7684\u5de5\u5177\u5305\uff0c\u5305\u542b\u96c6\u5408\u6846\u67b6\u3001\u65e5\u671f\u5904\u7406\u3001\u968f\u673a\u6570\u751f\u6210\u7b49\u3002<\/p>\n\n\n\n
                                                                                    \u4e3b\u8981\u7c7b\u548c\u529f\u80fd<\/p>\n\n\n\n
                                                                                      \n
                                                                                    • Collection<\/code> \u548c Collections<\/code><\/strong> :<\/li>\n\n\n\n
                                                                                    • \u529f\u80fd<\/strong> : Collection<\/code> \u662f\u96c6\u5408\u6846\u67b6\u7684\u6839\u63a5\u53e3\uff0c\u5b9a\u4e49\u4e86\u96c6\u5408\u7684\u57fa\u672c\u64cd\u4f5c\uff1bCollections<\/code> \u7c7b\u63d0\u4f9b\u4e86\u64cd\u4f5c\u96c6\u5408\u7684\u9759\u6001\u65b9\u6cd5\uff0c\u5982\u6392\u5e8f\u3001\u641c\u7d22\u3001\u53cd\u8f6c\u7b49\u3002<\/li>\n\n\n\n
                                                                                    • \u7528\u6cd5\u793a\u4f8b<\/strong> :<\/li>\n<\/ul>\n\n\n\n
                                                                                      Java<\/span><\/path><\/path><\/svg><\/span>
                                                                                      List<\/span><<\/span>Integer<\/span>> <\/span>numbers<\/span> = <\/span>new<\/span> <\/span>ArrayList<\/span><>(<\/span>Arrays<\/span>.<\/span>asList<\/span>(<\/span>3<\/span>, <\/span>2<\/span>, <\/span>1<\/span>));<\/span><\/span>\nCollections<\/span>.<\/span>sort<\/span>(numbers);  <\/span>\/\/ \u5bf9\u5217\u8868\u8fdb\u884c\u6392\u5e8f<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                                        \n
                                                                                      • List<\/code>\uff08\u5982 ArrayList<\/code>\u3001LinkedList<\/code>\uff09<\/strong> :<\/li>\n\n\n\n
                                                                                      • \u529f\u80fd<\/strong> : List<\/code> \u662f\u4e00\u4e2a\u6709\u5e8f\u7684\u96c6\u5408\uff0c\u5141\u8bb8\u91cd\u590d\u5143\u7d20\u3002ArrayList<\/code> \u662f\u57fa\u4e8e\u6570\u7ec4\u5b9e\u73b0\u7684\uff0c\u9002\u5408\u968f\u673a\u8bbf\u95ee\uff1bLinkedList<\/code> \u662f\u57fa\u4e8e\u94fe\u8868\u5b9e\u73b0\u7684\uff0c\u9002\u5408\u9891\u7e41\u7684\u63d2\u5165\u5220\u9664\u64cd\u4f5c\u3002<\/li>\n\n\n\n
                                                                                      • \u7528\u6cd5\u793a\u4f8b<\/strong> :<\/li>\n<\/ul>\n\n\n\n
                                                                                        Java<\/span><\/path><\/path><\/svg><\/span>
                                                                                        List<\/span><<\/span>String<\/span>> <\/span>names<\/span> = <\/span>new<\/span> <\/span>ArrayList<\/span><>();<\/span><\/span>\nnames<\/span>.<\/span>add<\/span>(<\/span>"Alice"<\/span>);<\/span><\/span>\nnames<\/span>.<\/span>add<\/span>(<\/span>"Bob"<\/span>);<\/span><\/span>\nSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>names<\/span>.<\/span>get<\/span>(<\/span>0<\/span>));  <\/span>\/\/ \u8bbf\u95ee\u7b2c\u4e00\u4e2a\u5143\u7d20<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                                          \n
                                                                                        • Map<\/code>\uff08\u5982 HashMap<\/code>\u3001TreeMap<\/code>\uff09<\/strong> :<\/li>\n\n\n\n
                                                                                        • \u529f\u80fd<\/strong> : Map<\/code> \u7528\u4e8e\u5b58\u50a8\u952e\u503c\u5bf9\uff0c\u4e0d\u5141\u8bb8\u91cd\u590d\u952e\u3002HashMap<\/code> \u63d0\u4f9b\u5feb\u901f\u67e5\u627e\uff0cTreeMap<\/code> \u6309\u7167\u952e\u7684\u81ea\u7136\u987a\u5e8f\u6216\u81ea\u5b9a\u4e49\u6392\u5e8f\u5b58\u50a8\u3002<\/li>\n\n\n\n
                                                                                        • \u7528\u6cd5\u793a\u4f8b<\/strong> :<\/li>\n<\/ul>\n\n\n\n
                                                                                          Java<\/span><\/path><\/path><\/svg><\/span>
                                                                                          Map<\/span><<\/span>String<\/span>, <\/span>Integer<\/span>> <\/span>map<\/span> = <\/span>new<\/span> <\/span>HashMap<\/span><>();<\/span><\/span>\nmap<\/span>.<\/span>put<\/span>(<\/span>"Alice"<\/span>, <\/span>30<\/span>);<\/span><\/span>\nmap<\/span>.<\/span>put<\/span>(<\/span>"Bob"<\/span>, <\/span>25<\/span>);<\/span><\/span>\nSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>map<\/span>.<\/span>get<\/span>(<\/span>"Alice"<\/span>));  <\/span>\/\/ \u8f93\u51fa 30<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                                            \n
                                                                                          • Set<\/code>\uff08\u5982 HashSet<\/code>\u3001TreeSet<\/code>\uff09<\/strong> :<\/li>\n\n\n\n
                                                                                          • \u529f\u80fd<\/strong> : Set<\/code> \u8868\u793a\u4e0d\u5305\u542b\u91cd\u590d\u5143\u7d20\u7684\u96c6\u5408\uff0cHashSet<\/code> \u57fa\u4e8e\u54c8\u5e0c\u8868\u5b9e\u73b0\uff0cTreeSet<\/code> \u57fa\u4e8e\u7ea2\u9ed1\u6811\u5b9e\u73b0\uff0c\u63d0\u4f9b\u6392\u5e8f\u529f\u80fd\u3002<\/li>\n\n\n\n
                                                                                          • \u7528\u6cd5\u793a\u4f8b<\/strong> :<\/li>\n<\/ul>\n\n\n\n
                                                                                            Java<\/span><\/path><\/path><\/svg><\/span>
                                                                                            Set<\/span><<\/span>String<\/span>> <\/span>uniqueNames<\/span> = <\/span>new<\/span> <\/span>HashSet<\/span><>();<\/span><\/span>\nuniqueNames<\/span>.<\/span>add<\/span>(<\/span>"Alice"<\/span>);<\/span><\/span>\nuniqueNames<\/span>.<\/span>add<\/span>(<\/span>"Alice"<\/span>);  <\/span>\/\/ \u91cd\u590d\u7684\u503c\u4e0d\u4f1a\u88ab\u6dfb\u52a0<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                                              \n
                                                                                            • Date<\/code> \u548c Calendar<\/code><\/strong> :<\/li>\n\n\n\n
                                                                                            • \u529f\u80fd<\/strong> : \u7528\u4e8e\u5904\u7406\u65e5\u671f\u548c\u65f6\u95f4\uff0cDate<\/code> \u7c7b\u8f83\u4e3a\u57fa\u7840\uff0cCalendar<\/code> \u63d0\u4f9b\u4e86\u66f4\u7075\u6d3b\u7684\u65e5\u671f\u64cd\u4f5c\u3002<\/li>\n\n\n\n
                                                                                            • \u7528\u6cd5\u793a\u4f8b<\/strong> :<\/li>\n<\/ul>\n\n\n\n
                                                                                              Java<\/span><\/path><\/path><\/svg><\/span>
                                                                                              Date<\/span> <\/span>date<\/span> = <\/span>new<\/span> <\/span>Date<\/span>();<\/span><\/span>\nSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(date);<\/span><\/span>\n<\/span>\nCalendar<\/span> <\/span>calendar<\/span> = <\/span>Calendar<\/span>.<\/span>getInstance<\/span>();<\/span><\/span>\ncalendar<\/span>.<\/span>set<\/span>(<\/span>2024<\/span>, <\/span>Calendar<\/span>.<\/span>OCTOBER<\/span>, <\/span>15<\/span>);<\/span><\/span>\nSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>calendar<\/span>.<\/span>getTime<\/span>());<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                                                \n
                                                                                              • Optional<\/code><\/strong> :<\/li>\n\n\n\n
                                                                                              • \u529f\u80fd<\/strong> : \u7528\u4e8e\u8868\u793a\u53ef\u80fd\u4e3a\u7a7a\u7684\u503c\uff0c\u907f\u514d null<\/code> \u5f15\u53d1\u7684\u7a7a\u6307\u9488\u5f02\u5e38\u3002<\/li>\n\n\n\n
                                                                                              • \u7528\u6cd5\u793a\u4f8b<\/strong> :<\/li>\n<\/ul>\n\n\n\n
                                                                                                Java<\/span><\/path><\/path><\/svg><\/span>
                                                                                                Optional<\/span><<\/span>String<\/span>> <\/span>name<\/span> = <\/span>Optional<\/span>.<\/span>ofNullable<\/span>(<\/span>null<\/span>);<\/span><\/span>\nSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>name<\/span>.<\/span>orElse<\/span>(<\/span>"Unknown"<\/span>));  <\/span>\/\/ \u8f93\u51fa "Unknown"<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                                                java.sql<\/code><\/h2>\n\n\n\n
                                                                                                 java.sql<\/code> \u63d0\u4f9b\u4e86\u4e0e\u6570\u636e\u5e93\u4ea4\u4e92\u7684 JDBC API\uff0c\u5141\u8bb8\u901a\u8fc7 SQL \u64cd\u4f5c\u6570\u636e\u5e93\u3002<\/p>\n\n\n\n
                                                                                                \u4e3b\u8981\u7c7b\u548c\u529f\u80fd<\/p>\n\n\n\n
                                                                                                  \n
                                                                                                • Connection<\/code><\/strong> :<\/li>\n\n\n\n
                                                                                                • \u529f\u80fd<\/strong> : \u8868\u793a\u4e0e\u6570\u636e\u5e93\u7684\u8fde\u63a5\uff0c\u4f7f\u7528 DriverManager<\/code> \u6216 DataSource<\/code> \u83b7\u53d6\u8fde\u63a5\u3002<\/li>\n\n\n\n
                                                                                                • \u7528\u6cd5\u793a\u4f8b<\/strong> :<\/li>\n<\/ul>\n\n\n\n
                                                                                                  Java<\/span><\/path><\/path><\/svg><\/span>
                                                                                                  Connection<\/span> <\/span>conn<\/span> = <\/span>DriverManager<\/span>.<\/span>getConnection<\/span>(<\/span>"jdbc:mysql:\/\/localhost:3306\/test"<\/span>, <\/span>"user"<\/span>, <\/span>"password"<\/span>);<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                                                    \n
                                                                                                  • Statement<\/code> \u548c PreparedStatement<\/code><\/strong> :<\/li>\n\n\n\n
                                                                                                  • \u529f\u80fd<\/strong> : \u7528\u4e8e\u6267\u884c SQL \u8bed\u53e5\uff0cPreparedStatement<\/code> \u652f\u6301\u53c2\u6570\u5316\u67e5\u8be2\uff0c\u53ef\u4ee5\u9632\u6b62 SQL \u6ce8\u5165\u3002<\/li>\n\n\n\n
                                                                                                  • \u7528\u6cd5\u793a\u4f8b<\/strong> :<\/li>\n<\/ul>\n\n\n\n
                                                                                                    Java<\/span><\/path><\/path><\/svg><\/span>
                                                                                                    PreparedStatement<\/span> <\/span>pstmt<\/span> = <\/span>conn<\/span>.<\/span>prepareStatement<\/span>(<\/span>"SELECT * FROM users WHERE age > ?"<\/span>);<\/span><\/span>\npstmt<\/span>.<\/span>setInt<\/span>(<\/span>1<\/span>, <\/span>30<\/span>);<\/span><\/span>\nResultSet<\/span> <\/span>rs<\/span> = <\/span>pstmt<\/span>.<\/span>executeQuery<\/span>();<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                                                      \n
                                                                                                    • ResultSet<\/code><\/strong> :<\/li>\n\n\n\n
                                                                                                    • \u529f\u80fd<\/strong> : \u7528\u4e8e\u5b58\u50a8\u548c\u64cd\u4f5c\u67e5\u8be2\u7ed3\u679c\uff0c\u652f\u6301\u904d\u5386\u3001\u66f4\u65b0\u7ed3\u679c\u96c6\u3002<\/li>\n\n\n\n
                                                                                                    • \u7528\u6cd5\u793a\u4f8b<\/strong> :<\/li>\n<\/ul>\n\n\n\n
                                                                                                      Java<\/span><\/path><\/path><\/svg><\/span>
                                                                                                      while<\/span> (<\/span>rs<\/span>.<\/span>next<\/span>()) {<\/span><\/span>\n    <\/span>String<\/span> <\/span>name<\/span> = <\/span>rs<\/span>.<\/span>getString<\/span>(<\/span>"name"<\/span>);<\/span><\/span>\n    <\/span>int<\/span> <\/span>age<\/span> = <\/span>rs<\/span>.<\/span>getInt<\/span>(<\/span>"age"<\/span>);<\/span><\/span>\n    <\/span>System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(name + <\/span>", "<\/span> + age);<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                                                        \n
                                                                                                      • DriverManager<\/code><\/strong> :<\/li>\n\n\n\n
                                                                                                      • \u529f\u80fd<\/strong> : \u7528\u4e8e\u7ba1\u7406\u6570\u636e\u5e93\u9a71\u52a8\u7a0b\u5e8f\u5e76\u521b\u5efa\u6570\u636e\u5e93\u8fde\u63a5\u3002<\/li>\n\n\n\n
                                                                                                      • \u7528\u6cd5\u793a\u4f8b<\/strong> :<\/li>\n<\/ul>\n\n\n\n
                                                                                                        Java<\/span><\/path><\/path><\/svg><\/span>
                                                                                                        DriverManager<\/span>.<\/span>registerDriver<\/span>(<\/span>new<\/span> com.<\/span>mysql<\/span>.<\/span>cj<\/span>.<\/span>jdbc<\/span>.<\/span>Driver<\/span>());<\/span><\/span>\nConnection<\/span> <\/span>conn<\/span> = <\/span>DriverManager<\/span>.<\/span>getConnection<\/span>(<\/span>"jdbc:mysql:\/\/localhost:3306\/test"<\/span>, <\/span>"user"<\/span>, <\/span>"password"<\/span>);<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                                                        javax.sql<\/code><\/h2>\n\n\n\n
                                                                                                        javax.sql \u7c7b\u5e93\u662f Java EE \u4e2d\u7528\u4e8e\u63d0\u4f9b\u5bf9\u5173\u7cfb\u6570\u636e\u5e93\u7684\u8bbf\u95ee\u548c\u64cd\u4f5c\u7684 API\u3002\u5b83\u5305\u542b\u591a\u4e2a\u4e3b\u8981\u7c7b\u548c\u63a5\u53e3\uff0c\u5e2e\u52a9\u5f00\u53d1\u8005\u8fdb\u884c\u6570\u636e\u5e93\u8fde\u63a5\u3001\u4e8b\u52a1\u7ba1\u7406\u3001\u5e76\u53d1\u8bbf\u95ee\u7b49\u64cd\u4f5c\u3002\u4ee5\u4e0b\u662f javax.sql \u7c7b\u5e93\u4e2d\u7684\u4e00\u4e9b\u4e3b\u8981\u7c7b\u548c\u529f\u80fd\uff0c\u4ee5\u53ca\u76f8\u5e94\u7684\u7b80\u5355\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n\n\n\n
                                                                                                        \u4e3b\u8981\u7c7b\u548c\u529f\u80fd<\/p>\n\n\n\n
                                                                                                          \n
                                                                                                        1. DataSource``DataSource<\/code> \u63a5\u53e3\u7528\u4e8e\u83b7\u53d6\u6570\u636e\u5e93\u8fde\u63a5\uff0c\u901a\u5e38\u6bd4 DriverManager<\/code> \u66f4\u7075\u6d3b\u4e14\u53ef\u914d\u7f6e\u3002\u5b83\u652f\u6301\u8fde\u63a5\u6c60\u3001\u5206\u5e03\u5f0f\u4e8b\u52a1\u7b49\u3002<\/li>\n<\/ol>\n\n\n\n
                                                                                                          Java<\/span><\/path><\/path><\/svg><\/span>
                                                                                                          import<\/span> javax.sql.DataSource;<\/span><\/span>\nimport<\/span> javax.naming.InitialContext;<\/span><\/span>\nimport<\/span> javax.naming.NamingException;<\/span><\/span>\nimport<\/span> java.sql.Connection;<\/span><\/span>\nimport<\/span> java.sql.SQLException;<\/span><\/span>\n<\/span>\npublic<\/span> <\/span>class<\/span> <\/span>DataSourceExample<\/span> {<\/span><\/span>\n    <\/span>public<\/span> <\/span>static<\/span> <\/span>void<\/span> <\/span>main<\/span>(<\/span>String<\/span>[] <\/span>args<\/span>) {<\/span><\/span>\n        <\/span>try<\/span> {<\/span><\/span>\n            <\/span>InitialContext<\/span> <\/span>ctx<\/span> = <\/span>new<\/span> <\/span>InitialContext<\/span>();<\/span><\/span>\n            <\/span>DataSource<\/span> <\/span>ds<\/span> = (DataSource) <\/span>ctx<\/span>.<\/span>lookup<\/span>(<\/span>"java:\/comp\/env\/jdbc\/MyDataSource"<\/span>);<\/span><\/span>\n            <\/span>try<\/span> (<\/span>Connection<\/span> <\/span>conn<\/span> = <\/span>ds<\/span>.<\/span>getConnection<\/span>()) {<\/span><\/span>\n                <\/span>\/\/ \u4f7f\u7528\u8fde\u63a5<\/span><\/span>\n            }<\/span><\/span>\n        } <\/span>catch<\/span> (<\/span>NamingException<\/span> | <\/span>SQLException<\/span> <\/span>e<\/span>) {<\/span><\/span>\n            <\/span>e<\/span>.<\/span>printStackTrace<\/span>();<\/span><\/span>\n        }<\/span><\/span>\n    }<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                                                            \n
                                                                                                          1. ConnectionPoolDataSource``ConnectionPoolDataSource<\/code> \u63a5\u53e3\u6269\u5c55\u4e86 DataSource<\/code>\uff0c\u63d0\u4f9b\u8fde\u63a5\u6c60\u529f\u80fd\u3002\u5b83\u7528\u4e8e\u521b\u5efa\u548c\u7ba1\u7406\u8fde\u63a5\u6c60\u3002<\/li>\n<\/ol>\n\n\n\n
                                                                                                            Java<\/span><\/path><\/path><\/svg><\/span>
                                                                                                            import<\/span> javax.sql.ConnectionPoolDataSource;<\/span><\/span>\nimport<\/span> javax.sql.PooledConnection;<\/span><\/span>\nimport<\/span> javax.sql.DataSource;<\/span><\/span>\nimport<\/span> java.sql.SQLException;<\/span><\/span>\n<\/span>\npublic<\/span> <\/span>class<\/span> <\/span>ConnectionPoolDataSourceExample<\/span> {<\/span><\/span>\n    <\/span>public<\/span> <\/span>static<\/span> <\/span>void<\/span> <\/span>main<\/span>(<\/span>String<\/span>[] <\/span>args<\/span>) {<\/span><\/span>\n        <\/span>ConnectionPoolDataSource<\/span> <\/span>cpds<\/span> = <\/span>\/\/ \u521b\u5efa\u8fde\u63a5\u6c60\u6570\u636e\u6e90<\/span><\/span>\n        <\/span>try<\/span> {<\/span><\/span>\n            <\/span>PooledConnection<\/span> <\/span>pconn<\/span> = <\/span>cpds<\/span>.<\/span>getPooledConnection<\/span>();<\/span><\/span>\n            <\/span>\/\/ \u4f7f\u7528 PooledConnection<\/span><\/span>\n        } <\/span>catch<\/span> (<\/span>SQLException<\/span> <\/span>e<\/span>) {<\/span><\/span>\n            <\/span>e<\/span>.<\/span>printStackTrace<\/span>();<\/span><\/span>\n        }<\/span><\/span>\n    }<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                                                              \n
                                                                                                            1. Connection``Connection<\/code> \u63a5\u53e3\u8868\u793a\u4e0e\u6570\u636e\u5e93\u7684\u8fde\u63a5\uff0c\u63d0\u4f9b\u7528\u4e8e\u6267\u884c SQL \u8bed\u53e5\u7684\u65b9\u6cd5\u3002<\/li>\n<\/ol>\n\n\n\n
                                                                                                              Java<\/span><\/path><\/path><\/svg><\/span>
                                                                                                              import<\/span> javax.sql.DataSource;<\/span><\/span>\nimport<\/span> java.sql.Connection;<\/span><\/span>\nimport<\/span> java.sql.ResultSet;<\/span><\/span>\nimport<\/span> java.sql.SQLException;<\/span><\/span>\nimport<\/span> java.sql.Statement;<\/span><\/span>\n<\/span>\npublic<\/span> <\/span>class<\/span> <\/span>ConnectionExample<\/span> {<\/span><\/span>\n    <\/span>public<\/span> <\/span>static<\/span> <\/span>void<\/span> <\/span>main<\/span>(<\/span>String<\/span>[] <\/span>args<\/span>) {<\/span><\/span>\n        <\/span>try<\/span> (<\/span>DataSource<\/span> <\/span>ds<\/span> = <\/span>\/* \u521d\u59cb\u5316\u6570\u636e\u6e90 *\/<\/span>) {<\/span><\/span>\n            <\/span>try<\/span> (<\/span>Connection<\/span> <\/span>conn<\/span> = <\/span>ds<\/span>.<\/span>getConnection<\/span>();<\/span><\/span>\n                 <\/span>Statement<\/span> <\/span>stmt<\/span> = <\/span>conn<\/span>.<\/span>createStatement<\/span>()) {<\/span><\/span>\n                <\/span>ResultSet<\/span> <\/span>rs<\/span> = <\/span>stmt<\/span>.<\/span>executeQuery<\/span>(<\/span>"SELECT * FROM users"<\/span>);<\/span><\/span>\n                <\/span>while<\/span> (<\/span>rs<\/span>.<\/span>next<\/span>()) {<\/span><\/span>\n                    <\/span>System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>rs<\/span>.<\/span>getString<\/span>(<\/span>"username"<\/span>));<\/span><\/span>\n                }<\/span><\/span>\n            }<\/span><\/span>\n        } <\/span>catch<\/span> (<\/span>SQLException<\/span> <\/span>e<\/span>) {<\/span><\/span>\n            <\/span>e<\/span>.<\/span>printStackTrace<\/span>();<\/span><\/span>\n        }<\/span><\/span>\n    }<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                                                                \n
                                                                                                              1. RowSet``RowSet<\/code> \u63a5\u53e3\u662f ResultSet<\/code> \u7684\u6269\u5c55\uff0c\u652f\u6301\u5bf9\u7ed3\u679c\u96c6\u7684\u64cd\u4f5c\u5e76\u53ef\u4ee5\u8f7b\u677e\u4e0e JavaBeans \u7ed3\u5408\u4f7f\u7528\u3002\u5b83\u53ef\u4ee5\u5b9e\u73b0\u79bb\u7ebf\u8bbf\u95ee\u3002<\/li>\n<\/ol>\n\n\n\n
                                                                                                                Java<\/span><\/path><\/path><\/svg><\/span>
                                                                                                                import<\/span> javax.sql.rowset.RowSet;<\/span><\/span>\nimport<\/span> javax.sql.rowset.RowSetProvider;<\/span><\/span>\nimport<\/span> javax.sql.rowset.jdbc.JdbcRowSet;<\/span><\/span>\n<\/span>\npublic<\/span> <\/span>class<\/span> <\/span>RowSetExample<\/span> {<\/span><\/span>\n    <\/span>public<\/span> <\/span>static<\/span> <\/span>void<\/span> <\/span>main<\/span>(<\/span>String<\/span>[] <\/span>args<\/span>) {<\/span><\/span>\n        <\/span>try<\/span> {<\/span><\/span>\n            <\/span>JdbcRowSet<\/span> <\/span>rowSet<\/span> = <\/span>RowSetProvider<\/span>.<\/span>newFactory<\/span>().<\/span>createJdbcRowSet<\/span>();<\/span><\/span>\n            <\/span>rowSet<\/span>.<\/span>setUrl<\/span>(<\/span>"jdbc:mysql:\/\/localhost:3306\/mydb"<\/span>);<\/span><\/span>\n            <\/span>rowSet<\/span>.<\/span>setUsername<\/span>(<\/span>"user"<\/span>);<\/span><\/span>\n            <\/span>rowSet<\/span>.<\/span>setPassword<\/span>(<\/span>"password"<\/span>);<\/span><\/span>\n            <\/span>rowSet<\/span>.<\/span>setCommand<\/span>(<\/span>"SELECT * FROM users"<\/span>);<\/span><\/span>\n            <\/span>rowSet<\/span>.<\/span>execute<\/span>();<\/span><\/span>\n<\/span>\n            <\/span>while<\/span> (<\/span>rowSet<\/span>.<\/span>next<\/span>()) {<\/span><\/span>\n                <\/span>System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>rowSet<\/span>.<\/span>getString<\/span>(<\/span>"username"<\/span>));<\/span><\/span>\n            }<\/span><\/span>\n        } <\/span>catch<\/span> (<\/span>Exception<\/span> <\/span>e<\/span>) {<\/span><\/span>\n            <\/span>e<\/span>.<\/span>printStackTrace<\/span>();<\/span><\/span>\n        }<\/span><\/span>\n    }<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                                                                  \n
                                                                                                                1. DataSource<\/code> \u7684\u4e3b\u8981\u529f\u80fd<\/li>\n<\/ol>\n\n\n\n
                                                                                                                    \n
                                                                                                                  • \u8fde\u63a5\u7ba1\u7406<\/strong> \uff1a\u901a\u8fc7 DataSource<\/code> \u548c\u8fde\u63a5\u6c60\u5b9e\u73b0\u9ad8\u6548\u7684\u6570\u636e\u5e93\u8fde\u63a5\u7ba1\u7406\u3002<\/li>\n\n\n\n
                                                                                                                  • \u4e8b\u52a1\u7ba1\u7406<\/strong> \uff1a\u53ef\u4ee5\u4f7f\u7528 Connection<\/code> \u5bf9\u8c61\u8fdb\u884c\u4e8b\u52a1\u5904\u7406\u3002<\/li>\n\n\n\n
                                                                                                                  • \u5e76\u53d1\u8bbf\u95ee<\/strong> \uff1a\u652f\u6301\u591a\u7ebf\u7a0b\u5e76\u53d1\u8bbf\u95ee\u6570\u636e\u5e93\u3002<\/li>\n<\/ul>\n\n\n\n
                                                                                                                    Spring \u76f8\u5173<\/h1>\n\n\n\n
                                                                                                                    IoC\uff08\u63a7\u5236\u53cd\u8f6c\uff09<\/h2>\n\n\n\n
                                                                                                                    IoC\uff08Inversion of Control\uff09\u662f\u4e00\u79cd\u8bbe\u8ba1\u539f\u5219\uff0c\u7528\u4e8e\u5c06\u5bf9\u8c61\u7684\u521b\u5efa\u548c\u7ba1\u7406\u4ea4\u7ed9\u5bb9\u5668\uff0c\u800c\u4e0d\u662f\u7531\u5bf9\u8c61\u81ea\u8eab\u63a7\u5236\u3002Spring\u901a\u8fc7\u5bb9\u5668\u5b9e\u73b0IoC\uff0c\u5bb9\u5668\u8d1f\u8d23\u5b9e\u4f8b\u5316\u3001\u914d\u7f6e\u548c\u7ba1\u7406\u8fd9\u4e9b\u5bf9\u8c61\u7684\u751f\u547d\u5468\u671f\u3002<\/p>\n\n\n\n
                                                                                                                    \u4ee3\u7801\u793a\u4f8b<\/p>\n\n\n\n
                                                                                                                    Java<\/span><\/path><\/path><\/svg><\/span>
                                                                                                                    \/\/ \u5b9a\u4e49\u4e00\u4e2a\u670d\u52a1\u63a5\u53e3<\/span><\/span>\npublic<\/span> <\/span>interface<\/span> <\/span>GreetingService<\/span> {<\/span><\/span>\n    <\/span>void<\/span> <\/span>greet<\/span>(<\/span>String<\/span> <\/span>name<\/span>);<\/span><\/span>\n}<\/span><\/span>\n<\/span>\n\/\/ \u5b9e\u73b0\u63a5\u53e3<\/span><\/span>\npublic<\/span> <\/span>class<\/span> <\/span>GreetingServiceImpl<\/span> <\/span>implements<\/span> <\/span>GreetingService<\/span> {<\/span><\/span>\n    @<\/span>Override<\/span><\/span>\n    <\/span>public<\/span> <\/span>void<\/span> <\/span>greet<\/span>(<\/span>String<\/span> <\/span>name<\/span>) {<\/span><\/span>\n        <\/span>System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>"Hello, "<\/span> + name);<\/span><\/span>\n    }<\/span><\/span>\n}<\/span><\/span>\n<\/span>\n\/\/ Spring\u914d\u7f6e\u7c7b<\/span><\/span>\n@<\/span>Configuration<\/span><\/span>\npublic<\/span> <\/span>class<\/span> <\/span>AppConfig<\/span> {<\/span><\/span>\n    @<\/span>Bean<\/span><\/span>\n    <\/span>public<\/span> <\/span>GreetingService<\/span> <\/span>greetingService<\/span>() {<\/span><\/span>\n        <\/span>return<\/span> <\/span>new<\/span> <\/span>GreetingServiceImpl<\/span>();<\/span><\/span>\n    }<\/span><\/span>\n}<\/span><\/span>\n<\/span>\n\/\/ \u4f7f\u7528IoC<\/span><\/span>\npublic<\/span> <\/span>class<\/span> <\/span>Main<\/span> {<\/span><\/span>\n    <\/span>public<\/span> <\/span>static<\/span> <\/span>void<\/span> <\/span>main<\/span>(<\/span>String<\/span>[] <\/span>args<\/span>) {<\/span><\/span>\n        <\/span>ApplicationContext<\/span> <\/span>context<\/span> = <\/span>new<\/span> <\/span>AnnotationConfigApplicationContext<\/span>(<\/span>AppConfig<\/span>.<\/span>class<\/span>);<\/span><\/span>\n        <\/span>GreetingService<\/span> <\/span>service<\/span> = <\/span>context<\/span>.<\/span>getBean<\/span>(<\/span>GreetingService<\/span>.<\/span>class<\/span>);<\/span><\/span>\n        <\/span>service<\/span>.<\/span>greet<\/span>(<\/span>"World"<\/span>);<\/span><\/span>\n    }<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                                                                    DI\uff08\u4f9d\u8d56\u6ce8\u5165\uff09<\/h2>\n\n\n\n
                                                                                                                    DI\uff08Dependency Injection\uff09\u662fIoC\u7684\u4e00\u79cd\u5b9e\u73b0\u65b9\u5f0f\uff0c\u901a\u8fc7\u6784\u9020\u51fd\u6570\u3001Setter\u65b9\u6cd5\u6216\u63a5\u53e3\u6ce8\u5165\u4f9d\u8d56\u7684\u5bf9\u8c61\u3002Spring\u4f7f\u7528DI\u6765\u5b9e\u73b0\u5bf9\u8c61\u4e4b\u95f4\u7684\u89e3\u8026\uff0c\u4f7f\u5f97\u4ee3\u7801\u66f4\u6613\u4e8e\u6d4b\u8bd5\u548c\u7ef4\u62a4\u3002<\/p>\n\n\n\n
                                                                                                                    \u4ee3\u7801\u793a\u4f8b<\/p>\n\n\n\n
                                                                                                                    Java<\/span><\/path><\/path><\/svg><\/span>
                                                                                                                    \/\/ \u5b9a\u4e49\u4e00\u4e2a\u6d88\u8d39\u8005\u7c7b<\/span><\/span>\npublic<\/span> <\/span>class<\/span> <\/span>MessagePrinter<\/span> {<\/span><\/span>\n    <\/span>private<\/span> <\/span>final<\/span> <\/span>GreetingService<\/span> <\/span>greetingService<\/span>;<\/span><\/span>\n<\/span>\n    <\/span>\/\/ \u6784\u9020\u5668\u6ce8\u5165<\/span><\/span>\n    <\/span>public<\/span> <\/span>MessagePrinter<\/span>(<\/span>GreetingService<\/span> <\/span>greetingService<\/span>) {<\/span><\/span>\n        <\/span>this<\/span>.<\/span>greetingService<\/span> = greetingService;<\/span><\/span>\n    }<\/span><\/span>\n<\/span>\n    <\/span>public<\/span> <\/span>void<\/span> <\/span>printMessage<\/span>(<\/span>String<\/span> <\/span>name<\/span>) {<\/span><\/span>\n        <\/span>greetingService<\/span>.<\/span>greet<\/span>(name);<\/span><\/span>\n    }<\/span><\/span>\n}<\/span><\/span>\n<\/span>\n\/\/ Spring\u914d\u7f6e\u7c7b<\/span><\/span>\n@<\/span>Configuration<\/span><\/span>\npublic<\/span> <\/span>class<\/span> <\/span>AppConfig<\/span> {<\/span><\/span>\n    @<\/span>Bean<\/span><\/span>\n    <\/span>public<\/span> <\/span>GreetingService<\/span> <\/span>greetingService<\/span>() {<\/span><\/span>\n        <\/span>return<\/span> <\/span>new<\/span> <\/span>GreetingServiceImpl<\/span>();<\/span><\/span>\n    }<\/span><\/span>\n<\/span>\n    @<\/span>Bean<\/span><\/span>\n    <\/span>public<\/span> <\/span>MessagePrinter<\/span> <\/span>messagePrinter<\/span>() {<\/span><\/span>\n        <\/span>return<\/span> <\/span>new<\/span> <\/span>MessagePrinter<\/span>(<\/span>greetingService<\/span>());<\/span><\/span>\n    }<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                                                                    AOP\uff08\u9762\u5411\u5207\u9762\u7f16\u7a0b\uff09<\/h2>\n\n\n\n
                                                                                                                    AOP\uff08Aspect-Oriented Programming\uff09\u662f\u4e3a\u4e86\u5206\u79bb\u5173\u6ce8\u70b9\u800c\u63d0\u51fa\u7684\u4e00\u79cd\u7f16\u7a0b\u601d\u60f3\u3002\u901a\u8fc7\u5b9a\u4e49\u5207\u9762\uff08Aspect\uff09\uff0c\u53ef\u4ee5\u5728\u4e0d\u4fee\u6539\u4e1a\u52a1\u903b\u8f91\u7684\u60c5\u51b5\u4e0b\u6dfb\u52a0\u529f\u80fd\uff0c\u5982\u65e5\u5fd7\u8bb0\u5f55\u3001\u4e8b\u52a1\u7ba1\u7406\u7b49\u3002<\/p>\n\n\n\n
                                                                                                                    \u4ee3\u7801\u793a\u4f8b<\/p>\n\n\n\n
                                                                                                                    Java<\/span><\/path><\/path><\/svg><\/span>
                                                                                                                    @<\/span>Aspect<\/span><\/span>\n@<\/span>Component<\/span><\/span>\npublic<\/span> <\/span>class<\/span> <\/span>LoggingAspect<\/span> {<\/span><\/span>\n    @<\/span>Before<\/span>(<\/span>"execution(* com.example.service.*.*(..))"<\/span>)<\/span><\/span>\n    <\/span>public<\/span> <\/span>void<\/span> <\/span>logBefore<\/span>(<\/span>JoinPoint<\/span> <\/span>joinPoint<\/span>) {<\/span><\/span>\n        <\/span>System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>"Executing: "<\/span> + <\/span>joinPoint<\/span>.<\/span>getSignature<\/span>());<\/span><\/span>\n    }<\/span><\/span>\n}<\/span><\/span>\n<\/span>\n\/\/ \u5728\u670d\u52a1\u7c7b\u4e2d\u4f7f\u7528<\/span><\/span>\n@<\/span>Service<\/span><\/span>\npublic<\/span> <\/span>class<\/span> <\/span>UserService<\/span> {<\/span><\/span>\n    <\/span>public<\/span> <\/span>void<\/span> <\/span>createUser<\/span>(<\/span>String<\/span> <\/span>username<\/span>) {<\/span><\/span>\n        <\/span>\/\/ \u521b\u5efa\u7528\u6237\u7684\u4e1a\u52a1\u903b\u8f91<\/span><\/span>\n    }<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                                                                    Spring\u4f53\u7cfb\u4ea7\u54c1<\/h2>\n\n\n\n
                                                                                                                    Spring Core<\/h3>\n\n\n\n
                                                                                                                    Spring Core\u662fSpring\u6846\u67b6\u7684\u57fa\u7840\uff0c\u63d0\u4f9bIoC\u548cDI\u529f\u80fd\u3002\u9002\u7528\u4e8e\u9700\u8981\u7ba1\u7406\u5bf9\u8c61\u751f\u547d\u5468\u671f\u548c\u4f9d\u8d56\u5173\u7cfb\u7684Java\u5e94\u7528\u3002<\/p>\n\n\n\n
                                                                                                                    Spring Boot<\/h3>\n\n\n\n
                                                                                                                    Spring Boot\u662f\u57fa\u4e8eSpring\u7684\u5feb\u901f\u5f00\u53d1\u6846\u67b6\uff0c\u7b80\u5316\u4e86Spring\u5e94\u7528\u7684\u914d\u7f6e\u548c\u90e8\u7f72\u3002\u9002\u7528\u4e8e\u5fae\u670d\u52a1\u3001RESTful API\u548c\u5feb\u901f\u539f\u578b\u5f00\u53d1\u3002<\/p>\n\n\n\n
                                                                                                                    \u4ee3\u7801\u793a\u4f8b<\/p>\n\n\n\n
                                                                                                                    Java<\/span><\/path><\/path><\/svg><\/span>
                                                                                                                    @<\/span>SpringBootApplication<\/span><\/span>\npublic<\/span> <\/span>class<\/span> <\/span>MyApplication<\/span> {<\/span><\/span>\n    <\/span>public<\/span> <\/span>static<\/span> <\/span>void<\/span> <\/span>main<\/span>(<\/span>String<\/span>[] <\/span>args<\/span>) {<\/span><\/span>\n        <\/span>SpringApplication<\/span>.<\/span>run<\/span>(<\/span>MyApplication<\/span>.<\/span>class<\/span>, args);<\/span><\/span>\n    }<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                                                                    Spring Data<\/h3>\n\n\n\n
                                                                                                                    Spring Data\u4e3a\u6570\u636e\u8bbf\u95ee\u63d0\u4f9b\u4e86\u4e00\u5957\u7edf\u4e00\u7684\u7f16\u7a0b\u6a21\u578b\uff0c\u7b80\u5316\u4e86\u6570\u636e\u5e93\u64cd\u4f5c\u3002\u9002\u7528\u4e8e\u9700\u8981\u4e0e\u4e0d\u540c\u6570\u636e\u6e90\uff08\u5982\u5173\u7cfb\u578b\u6570\u636e\u5e93\u3001NoSQL\u6570\u636e\u5e93\uff09\u4ea4\u4e92\u7684\u5e94\u7528\u3002<\/p>\n\n\n\n
                                                                                                                    \u4ee3\u7801\u793a\u4f8b<\/p>\n\n\n\n
                                                                                                                    Java<\/span><\/path><\/path><\/svg><\/span>
                                                                                                                    @<\/span>Repository<\/span><\/span>\npublic<\/span> <\/span>interface<\/span> <\/span>UserRepository<\/span> <\/span>extends<\/span> <\/span>JpaRepository<\/span><<\/span>User<\/span>, <\/span>Long<\/span>> {<\/span><\/span>\n    <\/span>List<\/span><<\/span>User<\/span>> <\/span>findByLastName<\/span>(<\/span>String<\/span> <\/span>lastName<\/span>);<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                                                                    Spring MVC<\/h3>\n\n\n\n
                                                                                                                    Spring MVC\u662f\u4e00\u4e2a\u7528\u4e8e\u6784\u5efaWeb\u5e94\u7528\u7a0b\u5e8f\u7684\u6846\u67b6\uff0c\u63d0\u4f9b\u4e86\u6a21\u578b-\u89c6\u56fe-\u63a7\u5236\u5668\u7684\u8bbe\u8ba1\u6a21\u5f0f\u3002\u9002\u7528\u4e8e\u9700\u8981\u6784\u5efaWeb\u5e94\u7528\u6216RESTful\u670d\u52a1\u7684\u573a\u666f\u3002<\/p>\n\n\n\n
                                                                                                                    \u4ee3\u7801\u793a\u4f8b<\/p>\n\n\n\n
                                                                                                                    Java<\/span><\/path><\/path><\/svg><\/span>
                                                                                                                    @<\/span>Controller<\/span><\/span>\npublic<\/span> <\/span>class<\/span> <\/span>UserController<\/span> {<\/span><\/span>\n    @<\/span>Autowired<\/span><\/span>\n    <\/span>private<\/span> <\/span>UserService<\/span> <\/span>userService<\/span>;<\/span><\/span>\n<\/span>\n    @<\/span>GetMapping<\/span>(<\/span>"\/users"<\/span>)<\/span><\/span>\n    <\/span>public<\/span> <\/span>String<\/span> <\/span>getUsers<\/span>(<\/span>Model<\/span> <\/span>model<\/span>) {<\/span><\/span>\n        <\/span>model<\/span>.<\/span>addAttribute<\/span>(<\/span>"users"<\/span>, <\/span>userService<\/span>.<\/span>findAll<\/span>());<\/span><\/span>\n        <\/span>return<\/span> <\/span>"userList"<\/span>;<\/span><\/span>\n    }<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
                                                                                                                    <\/h3>\n","protected":false},"excerpt":{"rendered":"
                                                                                                                    Java 8 \u7279\u6027 Java \u57fa\u672c\u8bed\u6cd5 \u53d8\u91cf\u4e0e\u6570\u636e\u7c7b\u578b Java \u662f\u5f3a\u7c7b\u578b\u8bed\u8a00\uff0c\u6240\u6709\u53d8\u91cf\u90fd\u9700\u8981\u58f0\u660e\u7c7b\u578b\u3002\u5e38\u89c1\u7684 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[12,14,16,13,15],"class_list":["post-236","post","type-post","status-publish","format-standard","hentry","category-11","tag-java","tag-java8","tag-16","tag-13","tag-15"],"yoast_head":"\nJava\u57fa\u7840\u77e5\u8bc6\uff08\u673a\u8bd5\u590d\u4e60\u7528\uff09 - LeezP\u2018s Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/leezp.top\/?p=236\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java\u57fa\u7840\u77e5\u8bc6\uff08\u673a\u8bd5\u590d\u4e60\u7528\uff09 - 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