基于UDP协议实现的Socket通信简单案例

1.服务端

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;public class UdpServer {public static void main(String[] args) throws IOException {// 1,创建服务端&＃43;端口DatagramSocket server &＃61; new DatagramSocket(1219);// 2,准备接收容器byte[] container &＃61; new byte[1024];// 3,封装成包 new DatagramPacket(byte[] b,int length)DatagramPacket packet &＃61; new DatagramPacket(container, container.length);// 4,接收数据,使用 DatagramSocket的实例的 receive( DatagramPacket ) 方法进行接收server.receive(packet);// 5,分析数据byte[] data &＃61; packet.getData();int length &＃61; packet.getLength();String msg &＃61; new String(data, 0, length);System.out.println(msg);server.close();}}

2.客户端

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetSocketAddress;public class UdpClient2 {public static void main(String[] args) throws IOException {// 1,创建服务端&＃43;端口DatagramSocket client &＃61; new DatagramSocket(614);// 2,准备数据String msg &＃61; "哈哈哈";byte [] data &＃61; msg.getBytes();// 3,打包&＃xff08;发送的地点及端口&＃xff09;DatagramPacket packet &＃61; new DatagramPacket(data, data.length, new InetSocketAddress("127.0.0.1", 1219));// 4,发送资源client.send(packet);// 5,关闭资源client.close();}}