[Network programming] java chat room

chatroom

一、发送消息的代码
package Lesson04;

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

public class TalkSend implements Runnable{
    
    
    DatagramSocket socket=null;
    BufferedReader bufferedReader=null;
    private int fromPort;
    private String toIP;
    private int toPort;

    public TalkSend(int fromPort, String toIP, int toPort) {
    
    
        this.fromPort = fromPort;
        this.toIP = toIP;
        this.toPort = toPort;
        try {
    
    
            socket = new DatagramSocket(fromPort);
            bufferedReader = new BufferedReader(new InputStreamReader(System.in));
        } catch (Exception e) {
    
    
            e.printStackTrace();
        }
    }

    @Override
    public void run() {
    
    
        while(true){
    
    
            try {
    
    
                String data = bufferedReader.readLine();
                DatagramPacket datagramPacket = new DatagramPacket(data.getBytes(),0,data.getBytes().length,new InetSocketAddress(this.toIP,this.toPort));
                socket.send(datagramPacket);
                if(datagramPacket.equals("bye")){
    
    
                    break;
                }
            } catch (Exception e) {
    
    
                e.printStackTrace();
            }
        }
        socket.close();
    }
}

二、接收消息的代码
package Lesson04;

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

public class TalkReceive implements Runnable{
    
    

    DatagramSocket socket=null;
    private int port;

    public TalkReceive(int port) {
    
    
        this.port = port;
        try {
    
    
            socket = new DatagramSocket(port);
        } catch (SocketException e) {
    
    
            e.printStackTrace();
        }
    }

    @Override
    public void run() {
    
    
        while(true){
    
    
            try {
    
    
                //接收数据
                byte[] bytes = new byte[1024];
                DatagramPacket datagramPacket = new DatagramPacket(bytes,0,bytes.length);
                socket.receive(datagramPacket);
                byte[] data = datagramPacket.getData();
                String s = new String(data, 0, data.length);
                System.out.println(s);
                if(s.equals("bye")){
    
    
                    break;
                }
            } catch (IOException e) {
    
    
                e.printStackTrace();
            }
        }
        socket.close();
    }
}

三、聊天人员
package Lesson04;

public class TalkStu {
    
    
    public static void main(String[] args) {
    
    
        //开启两个线程
        new Thread(new TalkSend(7777,"localhost",9999)).start();
        new Thread(new TalkReceive(8888)).start();
    }
}