使用UDP协议编写一个网络程序，设置接收端程序的监听端口是8001，发送端发送的数据是“Hello, world”。

来源：互联网发布：汽车单片机是什么意思编辑：程序博客网时间：2024/05/18 22:46

package bzu;import java.net.DatagramPacket; import java.net.DatagramSocket; import java.net.InetAddress; import java.net.SocketException;public class PersonTest {public static void main(String[] args) throws Exception {    // TODO Auto-generated method stub    DatagramSocket ds = new DatagramSocket(3000);    String str = "Hello World";    DatagramPacket dp = new DatagramPacket(str.getBytes(), str.length(),InetAddress.getByName("localhost"),8001);    ds.send(dp);    ds.close();}} package bzu;import java.net.DatagramPacket; import java.net.DatagramSocket;public class ServerTest {public static void main(String[] args)throws Exception {    // TODO Auto-generated method stub    byte[] buf = new byte[1024];    DatagramSocket ds = new DatagramSocket(8001);//定义一个datagramsocket对象，监听的端口8001    DatagramPacket dp = new DatagramPacket(buf, 1024);//用于接收数据    System.out.println("等待接受数据");    ds.receive(dp);    String str = new String(dp.getData(), 0, dp.getLength())+"from"+dp.getAddress().getHostAddress()+":"+dp.getPort();    System.out.println(str);    ds.close();}}

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