使用DatagramSocket发送和读取数据

1. package net.java2000.net;
3. import java.io.IOException;
4. import java.net.DatagramPacket;
5. import java.net.DatagramSocket;
6. import java.net.InetAddress;
7. import java.net.SocketException;
9. /**
10.  * 使用DatagramPacket和DatagramSocket发送和读取数据。
11.  * 
12.  * @author 赵学庆，Java世纪网(java2000.net)
13.  * 
14.  */
15. public class DatagramPacketReceiver {
17.   public static void main(String[] args) {
18.     try {
19.       new DatagramPacketReceiver.DatagramPacketSender().start();
20.       byte[] inbuf = new byte[256]; // 默认的数据缓冲大小
21.       DatagramSocket socket = new DatagramSocket(8888);
23.       // 等待数据
24.       DatagramPacket packet = new DatagramPacket(inbuf, inbuf.length);
25.       socket.receive(packet);
27.       int numBytesReceived = packet.getLength();
28.       System.out.println(new String(inbuf, 0, numBytesReceived, "UTF-8"));
29.     } catch (SocketException e) {
30.       e.printStackTrace();
31.     } catch (IOException e) {
32.       e.printStackTrace();
33.     }
35.   }
37.   static class DatagramPacketSender extends Thread {
39.     public void run() {
40.       try {
41.         Thread.sleep(1000); // 休眠1秒，等待接收服务启动
42.         InetAddress ia = InetAddress.getByName("127.0.0.1");
43.         byte[] bs = "JAVA世纪网,java2000.net".getBytes("UTF-8");
44.         DatagramPacket request = new DatagramPacket(bs, bs.length, ia, 8888);
45.         DatagramSocket socket = new DatagramSocket();
46.         socket.send(request);
47.       } catch (Exception e) {
48.         e.printStackTrace();
49.       }
50.     }
52.   }
54. }

运行结果
JAVA世纪网,java2000.net


原文：http://www.java2000.net/p9152













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