Java网络编程(UDP协议-聊天程序)

接收端：

 1 package WebProgramingDemo;
 2 
 3 import java.net.DatagramPacket;
 4 import java.net.DatagramSocket;
 5 
 6 public class CharReceivePart implements Runnable{
 7 
 8     private DatagramSocket ds;
 9     public CharReceivePart(DatagramSocket ds) {
10         this.ds=ds;
11     }
12     @Override
13     public void run() {
14         try{
15         while(true){
16             byte[] buf=new byte[1024];
17             DatagramPacket dp1=new DatagramPacket(buf, buf.length);
18             ds.receive(dp1);
19             String ip=dp1.getAddress().getHostAddress();
20             int port=dp1.getPort();
21             String text=new String(dp1.getData(),0,dp1.getLength());
22             System.out.println(ip+"::"+port+"::"+text);
23         }
24         }catch(Exception e){
25             
26         }
27     }
28 
29     
30 
31 }

发送端：

 1 package WebProgramingDemo;
 2 
 3 import java.io.BufferedReader;
 4 import java.io.InputStreamReader;
 5 import java.net.DatagramPacket;
 6 import java.net.DatagramSocket;
 7 import java.net.InetAddress;
 8 
 9 public class ChartSendPart implements Runnable {
10 
11     DatagramSocket ds2;
12     public ChartSendPart(DatagramSocket ds2) {
13         this.ds2=ds2;
14     }
15     @Override
16     public void run() {
17         try{
18         BufferedReader bufr=new BufferedReader(new InputStreamReader(System.in));
19         String line=null;
20         while((line=bufr.readLine())!=null){
21             byte buf[]=new byte[1024];
22             DatagramPacket dp2=new DatagramPacket(buf, buf.length,InetAddress.getByName("192.168.2.255"),10001);
23             ds2.send(dp2);
24         }
25         }catch(Exception e){
26             
27         }
28     }
29 
30     
31 
32 }

主类：

 1 package WebProgramingDemo;
 2 
 3 import java.io.IOException;
 4 import java.net.DatagramSocket;
 5 
 6 public class ChartDamo {
 7 
 8     /**
 9      * @param args
10      * @throws IOException 
11      */
12     public static void main(String[] args) throws IOException {
13 
14         DatagramSocket send=new DatagramSocket();
15         DatagramSocket receive=new DatagramSocket(10001);
16         new Thread(new ChartSendPart(send)).start();
17         new Thread(new CharReceivePart(receive)).start();
18     }
19 
20 }