UDP服务端：
package com.example.demo.learn.socket.udp;import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;/*** Socket服务端使用UDP协议，协议不可靠*/
public class UdpServer {public static void main(String[] args) throws IOException {int port = 8070;DatagramSocket socket = new DatagramSocket(port);System.out.println("UDP服务启动........");byte[] buf = new byte[1024];// 数据包DatagramPacket dp = new DatagramPacket(buf, buf.length);// 等待客户端进行发送, 如果客户端一直不发送，会有阻塞效果socket.receive(dp);String data = new String(dp.getData(), 0 ,dp.getLength());System.out.println("客户端发送的数据是: " + data);socket.close();}
}
UDP客户端 ：
package com.example.demo.learn.socket.udp;import java.io.IOException;
import java.net.*;/*** UDP客户端*/
public class UdpClient {public static void main(String[] args) throws IOException {System.out.println("udp 客户端发送数据开始......");DatagramSocket socket = new DatagramSocket();String data = "UDP客户端模拟的数据";byte[] bytes = data.getBytes();// 封装数据包DatagramPacket dp = new DatagramPacket(bytes, bytes.length, InetAddress.getByName("172.16.200.207"), 8070);// 发送数据包socket.send(dp);socket.close();}
}