Java Socket基本使用

首先 编写Client程序：

 import java.io.IOException;
 import java.net.Socket;
 import java.util.Scanner;

 public class Client {
     public static void main(String[] args) throws IOException {
         /**
          * 创建Socket
          * 接收服务器端发送数据
          */
         Socket socket = new Socket("127.0.0.1", 9999);
         Scanner sc = new Scanner(socket.getInputStream());
         sc.useDelimiter("\n");
         while(sc.hasNext()){
             System.out.println(sc.next());
         }
         sc.close();
         socket.close();
     }
 }

客户端通过多线程发送给客户端数据：

 import java.io.PrintStream;
 import java.net.ServerSocket;
 import java.net.Socket;

 class ThreadSocket implements Runnable {
     /**
      * 线程接收到socket实例后执行run（）处理
      */
     private Socket socket;

     public ThreadSocket(Socket socket) {
         this.socket = socket;
     }

     @Override
     public void run() {
         try {
             PrintStream printStream = new PrintStream(socket.getOutputStream());
             printStream.println("<h1 align='center'>nihao erzhi</h1>");
             printStream.close();
             socket.close();
         } catch (Exception e) {
             e.printStackTrace();
         }
     }
 }

 public class Server {
     public static void main(String[] args) throws Exception {
         /**
          * 创建ServerSocket
          */
         ServerSocket server = new ServerSocket(9999);
         Socket socket = null;
         while (true) {
             /**
              * 死循环监听端口
              * 有消息开一个线程处理
              */
             socket = server.accept();
             new Thread(new ThreadSocket(socket)).start();
         }
     }
 }