{"id":1256,"date":"2025-01-27T20:43:26","date_gmt":"2025-01-27T12:43:26","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=1256"},"modified":"2025-01-27T21:44:45","modified_gmt":"2025-01-27T13:44:45","slug":"%e8%bf%9b%e9%98%b6java%e7%bc%96%e7%a8%8b%ef%bc%9a%e6%8f%90%e5%8d%87java%e7%bc%96%e7%a8%8b%e6%8a%80%e8%83%bd%e7%9a%84%e8%bf%9b%e9%98%b6%e6%8a%80%e5%b7%a7%e4%b8%8e%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/01\/27\/%e8%bf%9b%e9%98%b6java%e7%bc%96%e7%a8%8b%ef%bc%9a%e6%8f%90%e5%8d%87java%e7%bc%96%e7%a8%8b%e6%8a%80%e8%83%bd%e7%9a%84%e8%bf%9b%e9%98%b6%e6%8a%80%e5%b7%a7%e4%b8%8e%e6%96%b9%e6%b3%95\/","title":{"rendered":"Java\u8fdb\u9636\u6559\u7a0b\uff1a\u591a\u7ebf\u7a0b\u3001\u53cd\u5c04\u3001JVM\u4f18\u5316\u7b49\u9ad8\u7ea7\u6280\u5de7"},"content":{"rendered":"\n

\u4ee5\u4e0b\u662f\u8fdb\u9636Java\u7f16\u7a0b<\/strong>\u7684\u6559\u7a0b\uff0c\u6db5\u76d6\u4e86\u591a\u7ebf\u7a0b\u7f16\u7a0b\u3001\u7f51\u7edc\u7f16\u7a0b\u3001JDBC\u6570\u636e\u5e93\u8fde\u63a5\u3001Java\u53cd\u5c04\u3001\u8bbe\u8ba1\u6a21\u5f0f\u7b49\u9ad8\u7ea7Java\u6280\u672f\u3002\u8fd9\u4e9b\u6280\u80fd\u6709\u52a9\u4e8e\u5f00\u53d1\u9ad8\u6548\u3001\u7075\u6d3b\u548c\u53ef\u7ef4\u62a4\u7684Java\u5e94\u7528\u3002<\/p>\n\n\n\n

\n\n\n\n

Java\u6559\u7a0b\u4e4b\uff1a\u8fdb\u9636Java\u7f16\u7a0b<\/strong><\/h3>\n\n\n\n

1. \u591a\u7ebf\u7a0b<\/strong><\/h4>\n\n\n\n
    \n
  • \u521b\u5efa\u7ebf\u7a0b\u7684\u4e24\u79cd\u65b9\u5f0f\uff08\u7ee7\u627fThread\u7c7b\u548c\u5b9e\u73b0Runnable\u63a5\u53e3\uff09<\/strong>
    Java\u4e2d\u53ef\u4ee5\u901a\u8fc7\u7ee7\u627fThread<\/code>\u7c7b\u6216\u5b9e\u73b0Runnable<\/code>\u63a5\u53e3\u6765\u521b\u5efa\u7ebf\u7a0b\u3002<\/li>\n\n\n\n
  • \u7ee7\u627fThread<\/code>\u7c7b\uff1a
    java class MyThread extends Thread { public void run() { System.out.println(\"Thread running...\"); } } MyThread t = new MyThread(); t.start();<\/code><\/li>\n\n\n\n
  • \u5b9e\u73b0Runnable<\/code>\u63a5\u53e3\uff1a class MyRunnable implements Runnable { public void run() { System.out.println(\"Runnable running...\"); } } Thread t = new Thread(new MyRunnable()); t.start();<\/code><\/li>\n\n\n\n
  • \u540c\u6b65\u4e0e\u9501\uff08synchronized\u5173\u952e\u5b57\uff09<\/strong>
    \u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e2d\uff0csynchronized<\/code>\u5173\u952e\u5b57\u7528\u4e8e\u786e\u4fdd\u540c\u4e00\u65f6\u523b\u53ea\u6709\u4e00\u4e2a\u7ebf\u7a0b\u8bbf\u95ee\u5171\u4eab\u8d44\u6e90\u3002<\/li>\n<\/ul>\n\n\n\n
      class Counter {\n      private int count = 0;\n\n      public synchronized void increment() {\n          count++;\n      }\n  }<\/code><\/pre>\n\n\n\n
      \n
    • \u7ebf\u7a0b\u95f4\u901a\u4fe1\uff08wait, notify, notifyAll\uff09<\/strong>
      wait()<\/code>\u3001notify()<\/code>\u548cnotifyAll()<\/code>\u65b9\u6cd5\u7528\u4e8e\u5b9e\u73b0\u7ebf\u7a0b\u95f4\u7684\u901a\u4fe1\uff0c\u901a\u5e38\u4e0e\u540c\u6b65\u5757\u4e00\u8d77\u4f7f\u7528\u3002<\/li>\n<\/ul>\n\n\n\n
        synchronized (obj) {\n      obj.wait();  \/\/ \u4f7f\u5f53\u524d\u7ebf\u7a0b\u7b49\u5f85\n      obj.notify();  \/\/ \u5524\u9192\u4e00\u4e2a\u7b49\u5f85\u7ebf\u7a0b\n      obj.notifyAll();  \/\/ \u5524\u9192\u6240\u6709\u7b49\u5f85\u7ebf\u7a0b\n  }<\/code><\/pre>\n\n\n\n
        \n
      • Executor\u6846\u67b6<\/strong>
        Executor<\/code>\u6846\u67b6\u63d0\u4f9b\u4e86\u4e00\u79cd\u66f4\u9ad8\u7ea7\u522b\u7684\u7ebf\u7a0b\u7ba1\u7406\u673a\u5236\uff0c\u53ef\u4ee5\u8f7b\u677e\u7ba1\u7406\u7ebf\u7a0b\u6c60\u548c\u4efb\u52a1\u8c03\u5ea6\u3002<\/li>\n<\/ul>\n\n\n\n
          ExecutorService executor = Executors.newFixedThreadPool(10);\n  executor.submit(() -> System.out.println(\"Task running...\"));\n  executor.shutdown();<\/code><\/pre>\n\n\n\n
        2. \u7f51\u7edc\u7f16\u7a0b<\/strong><\/h4>\n\n\n\n
          \n
        • Socket\u7f16\u7a0b<\/strong>
          Java\u63d0\u4f9b\u4e86Socket<\/code>\u7c7b\u8fdb\u884c\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u5668\u4e4b\u95f4\u7684\u901a\u4fe1\u3002\u5ba2\u6237\u7aef\u901a\u8fc7Socket<\/code>\u8fde\u63a5\u670d\u52a1\u5668\uff0c\u670d\u52a1\u5668\u901a\u8fc7ServerSocket<\/code>\u7b49\u5f85\u5ba2\u6237\u7aef\u8fde\u63a5\u3002<\/li>\n\n\n\n
        • \u5ba2\u6237\u7aef\u4ee3\u7801\uff1a
          java Socket socket = new Socket(\"localhost\", 8080); OutputStream os = socket.getOutputStream(); os.write(\"Hello, Server!\".getBytes()); socket.close();<\/code><\/li>\n\n\n\n
        • \u670d\u52a1\u5668\u7aef\u4ee3\u7801\uff1a ServerSocket serverSocket = new ServerSocket(8080); Socket socket = serverSocket.accept(); InputStream is = socket.getInputStream(); byte[] buffer = new byte[1024]; int bytesRead = is.read(buffer); System.out.println(new String(buffer, 0, bytesRead)); socket.close();<\/code><\/li>\n\n\n\n
        • \u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u5668\u7aef\u7684\u901a\u4fe1<\/strong>
          \u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u7aef\u901a\u8fc7\u6d41\uff08InputStream\u548cOutputStream\uff09\u8fdb\u884c\u6570\u636e\u4f20\u8f93\u3002\u670d\u52a1\u5668\u7aef\u901a\u5e38\u5728\u4e00\u4e2awhile<\/code>\u5faa\u73af\u4e2d\u63a5\u53d7\u591a\u4e2a\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u8bf7\u6c42\u3002<\/li>\n<\/ul>\n\n\n\n
          3. JDBC\u6570\u636e\u5e93\u8fde\u63a5<\/strong><\/h4>\n\n\n\n
            \n
          • JDBC\u57fa\u7840\uff08DriverManager\u3001Connection\u3001Statement\uff09<\/strong>
            JDBC\uff08Java Database Connectivity\uff09\u662fJava\u63d0\u4f9b\u7684\u4e00\u79cd\u7528\u4e8e\u8fde\u63a5\u6570\u636e\u5e93\u7684API\u3002\u5e38\u7528\u7c7b\u5305\u62ec\uff1a<\/li>\n\n\n\n
          • DriverManager<\/code>\uff1a\u7ba1\u7406\u6570\u636e\u5e93\u9a71\u52a8\u7a0b\u5e8f\u3002<\/li>\n\n\n\n
          • Connection<\/code>\uff1a\u5efa\u7acb\u4e0e\u6570\u636e\u5e93\u7684\u8fde\u63a5\u3002<\/li>\n\n\n\n
          • Statement<\/code>\uff1a\u6267\u884cSQL\u67e5\u8be2\u6216\u66f4\u65b0\u3002<\/li>\n<\/ul>\n\n\n\n
              Connection conn = DriverManager.getConnection(\"jdbc:mysql:\/\/localhost:3306\/mydb\", \"user\", \"password\");\n  Statement stmt = conn.createStatement();\n  ResultSet rs = stmt.executeQuery(\"SELECT * FROM users\");<\/code><\/pre>\n\n\n\n
              \n
            • PreparedStatement\u4e0e\u6279\u91cf\u64cd\u4f5c<\/strong>
              PreparedStatement<\/code>\u7528\u4e8e\u6267\u884c\u9884\u7f16\u8bd1\u7684SQL\u8bed\u53e5\uff0c\u63d0\u4f9b\u66f4\u597d\u7684\u6027\u80fd\u548c\u5b89\u5168\u6027\u3002\u4e5f\u53ef\u7528\u4e8e\u6279\u91cf\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n\n\n\n
                String query = \"INSERT INTO users (name, age) VALUES (?, ?)\";\n  PreparedStatement pstmt = conn.prepareStatement(query);\n  pstmt.setString(1, \"John\");\n  pstmt.setInt(2, 30);\n  pstmt.executeUpdate();<\/code><\/pre>\n\n\n\n
                \n
              • \u4e8b\u52a1\u7ba1\u7406<\/strong>
                JDBC\u652f\u6301\u4e8b\u52a1\u7ba1\u7406\uff0c\u786e\u4fdd\u591a\u4e2aSQL\u64cd\u4f5c\u8981\u4e48\u5168\u90e8\u6210\u529f\uff0c\u8981\u4e48\u5168\u90e8\u56de\u6eda\u3002<\/li>\n<\/ul>\n\n\n\n
                  conn.setAutoCommit(false);\n  try {\n      Statement stmt = conn.createStatement();\n      stmt.executeUpdate(\"UPDATE users SET age = 30 WHERE name = 'John'\");\n      stmt.executeUpdate(\"UPDATE users SET age = 25 WHERE name = 'Jane'\");\n      conn.commit();  \/\/ \u63d0\u4ea4\u4e8b\u52a1\n  } catch (SQLException e) {\n      conn.rollback();  \/\/ \u56de\u6eda\u4e8b\u52a1\n  }<\/code><\/pre>\n\n\n\n
                4. Java\u53cd\u5c04<\/strong><\/h4>\n\n\n\n
                  \n
                • \u83b7\u53d6\u7c7b\u7684\u4fe1\u606f<\/strong>
                  Java\u53cd\u5c04\u5141\u8bb8\u52a8\u6001\u5730\u83b7\u53d6\u7c7b\u7684\u4fe1\u606f\uff08\u5982\u7c7b\u540d\u3001\u65b9\u6cd5\u3001\u5b57\u6bb5\u7b49\uff09\u3002<\/li>\n<\/ul>\n\n\n\n
                    Class<?> clazz = Class.forName(\"com.example.MyClass\");\n  Method[] methods = clazz.getMethods();\n  for (Method method : methods) {\n      System.out.println(method.getName());\n  }<\/code><\/pre>\n\n\n\n
                    \n
                  • \u52a8\u6001\u52a0\u8f7d\u7c7b<\/strong>
                    \u53cd\u5c04\u4e5f\u53ef\u4ee5\u7528\u4e8e\u52a8\u6001\u52a0\u8f7d\u7c7b\u5e76\u521b\u5efa\u5bf9\u8c61\u5b9e\u4f8b\u3002<\/li>\n<\/ul>\n\n\n\n
                      Class<?> clazz = Class.forName(\"com.example.MyClass\");\n  Object obj = clazz.getDeclaredConstructor().newInstance();<\/code><\/pre>\n\n\n\n
                      \n
                    • \u53cd\u5c04\u4e0e\u6ce8\u89e3<\/strong>
                      Java\u6ce8\u89e3\u4e0e\u53cd\u5c04\u7ed3\u5408\u4f7f\u7528\uff0c\u53ef\u4ee5\u63d0\u4f9b\u66f4\u591a\u7684\u5143\u6570\u636e\u5e76\u5728\u8fd0\u884c\u65f6\u5bf9\u7c7b\u8fdb\u884c\u5904\u7406\u3002<\/li>\n<\/ul>\n\n\n\n
                        @Retention(RetentionPolicy.RUNTIME)\n  @Target(ElementType.METHOD)\n  public @interface MyAnnotation {\n      String value();\n  }\n\n  @MyAnnotation(value = \"example\")\n  public void myMethod() {}<\/code><\/pre>\n\n\n\n
                      5. \u8bbe\u8ba1\u6a21\u5f0f<\/strong><\/h4>\n\n\n\n
                      \u8bbe\u8ba1\u6a21\u5f0f\u662f\u8f6f\u4ef6\u5f00\u53d1\u4e2d\u7684\u901a\u7528\u89e3\u51b3\u65b9\u6848\uff0c\u7528\u4e8e\u89e3\u51b3\u5e38\u89c1\u95ee\u9898\u3002\u4ee5\u4e0b\u662f\u51e0\u79cd\u5e38\u7528\u7684\u8bbe\u8ba1\u6a21\u5f0f\uff1a<\/p>\n\n\n\n
                        \n
                      • \u5355\u4f8b\u6a21\u5f0f<\/strong>
                        \u5355\u4f8b\u6a21\u5f0f\u786e\u4fdd\u4e00\u4e2a\u7c7b\u53ea\u6709\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u5e76\u63d0\u4f9b\u4e00\u4e2a\u5168\u5c40\u8bbf\u95ee\u70b9\u3002<\/li>\n<\/ul>\n\n\n\n
                          public class Singleton {\n      private static Singleton instance;\n      private Singleton() {}\n      public static Singleton getInstance() {\n          if (instance == null) {\n              instance = new Singleton();\n          }\n          return instance;\n      }\n  }<\/code><\/pre>\n\n\n\n
                          \n
                        • \u5de5\u5382\u6a21\u5f0f<\/strong>
                          \u5de5\u5382\u6a21\u5f0f\u63d0\u4f9b\u4e86\u4e00\u4e2a\u521b\u5efa\u5bf9\u8c61\u7684\u63a5\u53e3\uff0c\u4f46\u7531\u5b50\u7c7b\u51b3\u5b9a\u5b9e\u4f8b\u5316\u54ea\u4e00\u4e2a\u7c7b\u3002<\/li>\n<\/ul>\n\n\n\n
                            public interface Animal {\n      void sound();\n  }\n\n  public class Dog implements Animal {\n      public void sound() {\n          System.out.println(\"Bark\");\n      }\n  }\n\n  public class AnimalFactory {\n      public Animal createAnimal(String type) {\n          if (type.equals(\"Dog\")) {\n              return new Dog();\n          }\n          return null;\n      }\n  }<\/code><\/pre>\n\n\n\n
                            \n
                          • \u89c2\u5bdf\u8005\u6a21\u5f0f<\/strong>
                            \u89c2\u5bdf\u8005\u6a21\u5f0f\u5b9a\u4e49\u4e86\u5bf9\u8c61\u95f4\u7684\u4e00\u5bf9\u591a\u4f9d\u8d56\u5173\u7cfb\uff0c\u4e00\u4e2a\u5bf9\u8c61\u72b6\u6001\u53d1\u751f\u53d8\u5316\u65f6\uff0c\u6240\u6709\u4f9d\u8d56\u5b83\u7684\u5bf9\u8c61\u90fd\u4f1a\u81ea\u52a8\u66f4\u65b0\u3002<\/li>\n<\/ul>\n\n\n\n
                              public class Subject {\n      private List<Observer> observers = new ArrayList<>();\n      public void addObserver(Observer observer) {\n          observers.add(observer);\n      }\n      public void notifyObservers() {\n          for (Observer observer : observers) {\n              observer.update();\n          }\n      }\n  }\n\n  public interface Observer {\n      void update();\n  }<\/code><\/pre>\n\n\n\n
                              \n
                            • \u4ee3\u7406\u6a21\u5f0f<\/strong>
                              \u4ee3\u7406\u6a21\u5f0f\u4e3a\u5176\u4ed6\u5bf9\u8c61\u63d0\u4f9b\u4e00\u79cd\u4ee3\u7406\u4ee5\u63a7\u5236\u5bf9\u8be5\u5bf9\u8c61\u7684\u8bbf\u95ee\u3002\u5e38\u89c1\u7684\u4ee3\u7406\u6a21\u5f0f\u5305\u62ec\u865a\u62df\u4ee3\u7406\u3001\u4fdd\u62a4\u4ee3\u7406\u7b49\u3002<\/li>\n<\/ul>\n\n\n\n
                                public interface RealSubject {\n      void request();\n  }\n\n  public class RealSubjectImpl implements RealSubject {\n      public void request() {\n          System.out.println(\"Requesting...\");\n      }\n  }\n\n  public class Proxy implements RealSubject {\n      private RealSubjectImpl realSubject;\n\n      public void request() {\n          if (realSubject == null) {\n              realSubject = new RealSubjectImpl();\n          }\n          realSubject.request();\n      }\n  }<\/code><\/pre>\n\n\n\n
                              \n\n\n\n
                              \u603b\u7ed3<\/strong><\/h3>\n\n\n\n
                              \u672c\u90e8\u5206\u4ecb\u7ecd\u4e86Java\u4e2d\u7684\u8fdb\u9636\u7f16\u7a0b\u6280\u672f\uff0c\u5305\u62ec\u591a\u7ebf\u7a0b\u7f16\u7a0b\u3001\u7f51\u7edc\u7f16\u7a0b\u3001JDBC\u6570\u636e\u5e93\u8fde\u63a5\u3001Java\u53cd\u5c04\u3001\u8bbe\u8ba1\u6a21\u5f0f\u7b49\u3002\u901a\u8fc7\u638c\u63e1\u8fd9\u4e9b\u6280\u672f\uff0c\u5f00\u53d1\u8005\u80fd\u591f\u6784\u5efa\u9ad8\u6548\u3001\u7075\u6d3b\u7684Java\u5e94\u7528\uff0c\u5e76\u80fd\u591f\u5e94\u5bf9\u590d\u6742\u7684\u5f00\u53d1\u4efb\u52a1\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
                              \u4ee5\u4e0b\u662f\u8fdb\u9636Java\u7f16\u7a0b\u7684\u6559\u7a0b\uff0c\u6db5\u76d6\u4e86\u591a\u7ebf\u7a0b\u7f16\u7a0b\u3001\u7f51\u7edc\u7f16\u7a0b\u3001JDBC\u6570\u636e\u5e93\u8fde\u63a5\u3001Java\u53cd\u5c04\u3001\u8bbe\u8ba1\u6a21\u5f0f\u7b49\u9ad8\u7ea7Ja […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[68],"tags":[],"class_list":["post-1256","post","type-post","status-publish","format-standard","hentry","category-java"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/1256","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=1256"}],"version-history":[{"count":2,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/1256\/revisions"}],"predecessor-version":[{"id":1266,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/1256\/revisions\/1266"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=1256"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=1256"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=1256"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}