socket服务端和客户端数据通信 数据交互

直接上代码吧！代码中都有注释。

 

服务端：

 

package socket.example;import java.io.BufferedInputStream;import java.io.DataInputStream;import java.io.DataOutputStream;import java.io.IOException;import java.net.ServerSocket;import java.net.Socket;import java.net.UnknownHostException;/** 简单的socket服务端，实现和客户端的数据交换*/public class SocketServer {public static final int PORT = 9999;//端口public static void start() throws IOException {// 建立服务监听ServerSocket serverSocket = new ServerSocket(PORT);Socket s = serverSocket.accept();System.out.println("建立Socket链接！！！");String serverMessage = "收到客户端呼叫！！！";//服务端吧输入放到前面，输出放到后面//接收客户端的信息DataInputStream dis = new DataInputStream(new BufferedInputStream(s.getInputStream()));System.out.println("客户端呼叫显示===>>>>>>" + dis.readUTF());//向客户端发送信息DataOutputStream ps = new DataOutputStream(s.getOutputStream());ps.writeUTF(serverMessage);ps.flush();//一定要写，负责客户端会进入等待状态dis.close();ps.close();}public static void main(String[] arge) throws UnknownHostException,IOException {SocketServer.start();}}

 

客户端：

 

package socket.example;import java.io.BufferedInputStream;import java.io.DataInputStream;import java.io.DataOutputStream;import java.io.IOException;import java.net.Socket;import java.net.UnknownHostException;/** 简单的socket客户端，实现和服务端的数据交换*/public class SocketClient {public static final String IP = "127.0.0.1";//服务端ip地址public static final int PORT = 9999;//服务端监听端口public static void start() throws UnknownHostException, IOException {//创建socket链接Socket s = new Socket(IP, PORT);String clientMessage = "呼叫服务器端，请建立Socket链接";System.out.println("Socket 客户端执行！！！！");//向服务端发送消息DataOutputStream ps = new DataOutputStream(s.getOutputStream());ps.writeUTF(clientMessage);ps.flush();//接收服务端的消息DataInputStream dis = new DataInputStream(new BufferedInputStream(s.getInputStream()));System.out.println("服务器返回的信息====》》》》" + dis.readUTF());dis.close();ps.close();}public static void main(String[] arge) throws UnknownHostException,IOException {SocketClient.start();}}