{网络编程}和{多线程}应用：基于UDP协议【实现多发送方发送数据到同一个接收者】--练习

要求：

使用多线程实现多发送方发送数据到同一个接收者

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代码：

发送端：可以在多台电脑上启动发送端，同时向接收端发送数据

注意：匹配地址和端口号

package com.qf.demo;

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

public class SendTest {
    public static void main(String[] args) {
        System.out.println("发送端已启动！");

        DatagramSocket socket=null;

        try {
            //1.创建socket对象
            socket=new DatagramSocket();
            //2.要发送的内容，可以用Scanner在后台输入
            String string="最近很烦，有时间陪我聊天吗？";
            DatagramPacket packet=new DatagramPacket(string.getBytes(), string.getBytes().length, InetAddress.getLocalHost(), 6677);
            //3.发送数据
            socket.send(packet);
        } catch (SocketException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (UnknownHostException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally {
            if(socket!=null){
                socket.close();
            }
        }
    }
}

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接收端：

package com.qf.demo;

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

public class ReceiveTest {

    public static void main(String[] args) {
        // 1 socket

        try {
            DatagramSocket socket = new DatagramSocket(6677);
            while(true){
                byte[] bs = new byte[1024];
                DatagramPacket p = new DatagramPacket(bs, bs.length);
                socket.receive(p);// 阻塞程序程序执行
                MyThread thread = new MyThread(p);
                thread.start();
            }
        } catch (SocketException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }
}

class MyThread extends Thread{
    DatagramPacket p = null;
    public MyThread(DatagramPacket p ) {
        this.p = p;
    }
    @Override
    public void run() {

        // 将接收到的数据进行 打印输出
        System.out.println("接收到的--发送端--数据："+new String(p.getData(),0,p.getLength()));
    }
}

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运行结果：

接收端：