Java网络编程(UDP协议-聊天程序)

接收端：

 package WebProgramingDemo;

 import java.net.DatagramPacket;
 import java.net.DatagramSocket;

 public class CharReceivePart implements Runnable{

     private DatagramSocket ds;
     public CharReceivePart(DatagramSocket ds) {
         this.ds=ds;
     }
     @Override
     public void run() {
         try{
         while(true){
             byte[] buf=new byte[1024];
             DatagramPacket dp1=new DatagramPacket(buf, buf.length);
             ds.receive(dp1);
             String ip=dp1.getAddress().getHostAddress();
             int port=dp1.getPort();
             String text=new String(dp1.getData(),0,dp1.getLength());
             System.out.println(ip+"::"+port+"::"+text);
         }
         }catch(Exception e){

         }
     }

 }

发送端：

 package WebProgramingDemo;

 import java.io.BufferedReader;
 import java.io.InputStreamReader;
 import java.net.DatagramPacket;
 import java.net.DatagramSocket;
 import java.net.InetAddress;

 public class ChartSendPart implements Runnable {

     DatagramSocket ds2;
     public ChartSendPart(DatagramSocket ds2) {
         this.ds2=ds2;
     }
     @Override
     public void run() {
         try{
         BufferedReader bufr=new BufferedReader(new InputStreamReader(System.in));
         String line=null;
         while((line=bufr.readLine())!=null){
             byte buf[]=new byte[1024];
             DatagramPacket dp2=new DatagramPacket(buf, buf.length,InetAddress.getByName("192.168.2.255"),10001);
             ds2.send(dp2);
         }
         }catch(Exception e){

         }
     }

 }

主类：

 package WebProgramingDemo;

 import java.io.IOException;
 import java.net.DatagramSocket;

 public class ChartDamo {

     /**
      * @param args
      * @throws IOException
      */
     public static void main(String[] args) throws IOException {

         DatagramSocket send=new DatagramSocket();
         DatagramSocket receive=new DatagramSocket(10001);
         new Thread(new ChartSendPart(send)).start();
         new Thread(new CharReceivePart(receive)).start();
     }

 }