Java--Socket,客户端，服务端双向通信

服务端：

import java.io.BufferedReader;import java.io.DataInputStream;import java.io.DataOutputStream;import java.io.InputStreamReader;import java.net.ServerSocket;import java.net.Socket;public class Server {public static final int PORT = 8000;//监听的端口号       public static void main(String[] args) {          Server server = new Server();          server.init();      }        public void init() {          try {              ServerSocket serverSocket = new ServerSocket(PORT);              while (true) {                  Socket client = serverSocket.accept();                  //一个客户端连接就开户一个线程处理                  new Thread(new HandlerThread(client)).start();              }          } catch (Exception e) {              System.out.println("服务器异常: " + e.getMessage());          }      }        private class HandlerThread implements Runnable {          private Socket client;          public HandlerThread(Socket client) {              this.client = client;          }            public void run() {              try {                  //读取客户端数据                  DataInputStream dis = new DataInputStream(client.getInputStream());                String reciver = dis.readUTF();                //处理客户端数据                  System.out.println("客户端发过来的内容:" + reciver);                    //向客户端回复信息                  DataOutputStream dos = new DataOutputStream(client.getOutputStream());                  System.out.print("请输入:\t");                  // 发送键盘输入的一行                  String send = new BufferedReader(new InputStreamReader(System.in)).readLine();                  dos.writeUTF(send);                                  dos.close();                  dis.close();              } catch (Exception e) {                  System.out.println("服务器异常: " + e.getMessage());              } finally {                  if (client != null) {                      try {                      client.close();                      } catch (Exception e) {                      client = null;                          System.out.println("服务端异常:" + e.getMessage());                      }                  }              }         }      }  }  

客户端：

import java.io.BufferedReader;import java.io.DataInputStream;import java.io.DataOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.net.Socket;public class Client {public static final String IP = "localhost";//服务器地址 public static final int PORT = 8000;//服务器端口号      public static void main(String[] args) {          while (true) {          Socket client = null;        try {        //创建一个流套接字,连接到指定主机上的指定端口号        client = new Socket(IP, PORT);                            //读取服务器端数据              DataInputStream dis = new DataInputStream(client.getInputStream());              //向服务器端发送数据              DataOutputStream dos = new DataOutputStream(client.getOutputStream());              System.out.print("请输入: \t");              String send = new BufferedReader(new InputStreamReader(System.in)).readLine();              dos.writeUTF(send);                            String reciver = dis.readUTF();               System.out.println("服务器端返回过来的是: " + reciver);                          dos.close();            dis.close();        } catch (Exception e) {        System.out.println("客户端异常:" + e.getMessage());         } finally {        if (client != null) {        try {        client.close();} catch (IOException e) {client = null; System.out.println("客户端异常:" + e.getMessage()); }        }        }        }      }  }