java se 局域网小聊天室

来源：互联网发布：淘宝怎样退货编辑：程序博客网时间：2024/05/24 06:57

//主进程

package com.study.chat;

import java.net.DatagramSocket;
import java.net.SocketException;

public class start {

   public static void main(String[] args) throws SocketException {
       // TODO Auto-generated method stub
       DatagramSocket sendds=new DatagramSocket();
       DatagramSocket receds=new DatagramSocket(13000);
       Rece rece=new Rece(receds);
       Send send=new Send(sendds);
       new Thread(rece).start();     //多线程
       new Thread(send).start();
   }

}

//聊天室

package com.study.chat;

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

public class Rece implements Runnable {

   private DatagramSocket ds;
   public Rece(DatagramSocket ds) {
       this.ds=ds;
   }
   @Override
   public void run() {
       // TODO Auto-generated method stub
       try {
           byte[] buf=new byte[1024];
           DatagramPacket dp=new DatagramPacket(buf, 0, buf.length);
           ds.receive(dp);
           String ip=dp.getAddress().getHostAddress();
           String content=new String(dp.getData(),0,dp.getLength());
           System.out.println(ip+":"+content);
           if(content.equals("886")) {
               System.out.println("提示"+ip+"已经退出聊天室");
           }
       } catch (Exception e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       }
   }
}

//发送信息

package com.study.chat;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;

public class Send implements Runnable {

   private DatagramSocket ds;
   private DatagramPacket dp;

   public Send(DatagramSocket ds) {
       this.ds=ds;
   }
   @Override
   public void run() {
       // TODO Auto-generated method stub
       try {
           // 键盘输入
           BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
           String line = null;
           while ((line = br.readLine()) != null) {
               byte[] buf = new byte[1024];
               buf = line.getBytes();
               // 192.168.1.255 为此网段广播,这样所有在该网段的电脑都能收到
               dp = new DatagramPacket(buf, buf.length, InetAddress.getByName("192.168.1.255"), 13000);
               ds.send(dp);
               if("886".equals(line))
                   break;
           }
           ds.close();
       } catch (Exception e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       }
   }

}

阅读全文

0 0