UDP多线程在线咨询

TalkSend

package com.guo.StudentAndTeacher;

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 reader = 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);
            reader = new BufferedReader(new InputStreamReader(System.in));
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    @Override
    public void run() {
        //准备数据：控制台读取Syetem.in
        while (true){
            try{
                String date = reader.readLine();
                if (date.equals("bye")){
                    break;
                }
                byte[] dates = date.getBytes();
                DatagramPacket packet = new DatagramPacket(dates,0,dates.length,new InetSocketAddress(this.toIP,this.toPort));

                socket.send(packet);
            }
            catch (Exception e){
                e.printStackTrace();
            }
        }
        socket.close();
    }


}

TalkReceive

package com.guo.StudentAndTeacher;

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;
    private String msgFrom;

    public TalkReceive(int port,String msgFrom) {
        this.port = port;
        this.msgFrom = msgFrom;
        try {
            socket = new DatagramSocket(port);

        }catch (SocketException e){
            e.printStackTrace();
        }
    }

    @Override
    public void run() {
        while (true){

            //准备接收包裹
            try {
                byte[] container = new byte[1024];
                DatagramPacket packet = new DatagramPacket(container,0,container.length);
                socket.receive(packet);//阻塞式接收包裹

                //断开连接 bye
                byte[] date =packet.getData();
                String receiveDate = new String(date, 0,packet.getLength());

                System.out.println(msgFrom+":"+receiveDate);

                if (receiveDate.equals("bye")){
                    break;
                }
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
        socket.close();
    }
}

TalkStudent

package com.guo.StudentAndTeacher;

public class TalkStudent {
    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,"老师")).start();
    }
}

TalkTeacher

package com.guo.StudentAndTeacher;

public class TalkTeacher {
    public static void main(String[] args) {
        //开启两个线程
        new Thread(new TalkSend(5555, "localhost", 8888)).start();
        new Thread(new TalkReceive(9999,"学生")).start();
    }
}