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(); } }