欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页

UDP聊天室

程序员文章站 2022-06-30 09:08:19
...

我们已经了解了UDP的协议,那么现在我们就简单的做一个UDP的聊天室

我们定义一个 UDPChatDemo类,里面有主方法,还定义一个发送端的线程类SendThread,为了记录名字,所以用继承方式,一个接收端的线程类Receive,主线程启动1个接收端,2个发送端。

package com.wangLuo;

import java.io.*;
import java.net.*;
import java.util.Date;

/**
 * @author 林高禄
 * @create 2020-05-21-17:32
 */
public class UDPChatDemo{

    public static void main(String[] args) {

        Receive receive = new Receive();
        Thread thread = new Thread(receive);
        thread.setPriority(10);
        thread.start();
        createSent("林高禄");
        createSent("徐辉强");

    }
    public static void createSent(String name){
        SendThread sendThread = new SendThread(name);
        sendThread.start();
    }
}

class SendThread extends Thread{
    
    public SendThread(String name) {
        super(name);
    }

    @Override
    public void run() {
        try {
            send();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private void send() throws IOException {
        DatagramSocket ds = new DatagramSocket();
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String line;
        while((line = br.readLine())!= null){
            String newLine = Thread.currentThread().getName()+"--"+new Date().toString()+"\n\r"+line;
            byte[] bytes = newLine.getBytes();
            DatagramPacket dp = new DatagramPacket(bytes,bytes.length, InetAddress.getByName("192.168.1.55"),10);
            ds.send(dp);
            if("6了".equals(line)){
                break;
            }
        }
        ds.close();
    }

}

class Receive implements Runnable{

    @Override
    public void run() {
        try {
            receive();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private void receive() throws IOException {
        DatagramSocket ds = new DatagramSocket(10);
        while(true){
            byte[] bys = new byte[1024];
            DatagramPacket dp = new DatagramPacket(bys,bys.length);
            ds.receive(dp);
            byte[] data = dp.getData();
            int length = dp.getLength();
            System.out.println(new String(data,0,length));
        }
    }
}

 聊天记录:

UDP聊天室

 

灰色的字是键盘输入的,白色的字是接收端输出的,这个聊天记录有点乱,还有空行什么的,是因为我们是用多线程来做,键盘输入的时候线程时随机的,并且输入完毕的时候,不一定到接收线程接收,有可能是另一个客户端线程,所以会出现这种情况,如果想改进,那就得把客户端单独拿出来另一个主方法,我们修改一下

接收端代码

package com.wangLuo;

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

/**
 * @author 林高禄
 * @create 2020-05-22-17:18
 */
public class Receive {

    public static void main(String[] args) throws IOException {
        Receive receive = new Receive();
        receive.receive();
    }

    private void receive() throws IOException {
        DatagramSocket ds = new DatagramSocket(10);
        while(true){
            byte[] bys = new byte[1024];
            DatagramPacket dp = new DatagramPacket(bys,bys.length);
            ds.receive(dp);
            byte[] data = dp.getData();
            int length = dp.getLength();
            System.out.println(new String(data,0,length));
        }
    }
}

客户端(发送端)代码

package com.wangLuo;

import java.io.*;
import java.net.*;
import java.util.Date;

/**
 * @author 林高禄
 * @create 2020-05-22-16:56
 */
public class Send {

    private String name;
    public Send(String name) {
        this.name = name;
    }

    public static void main(String[] args) throws IOException {
        Send send = new Send("林高禄");
        send.send();
    }
    private void send() throws IOException {
        DatagramSocket ds = new DatagramSocket();
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String line;
        while((line = br.readLine())!= null){
            String newLine = this.getName()+"--"+new Date().toString()+"\n\r"+line;
            byte[] bytes = newLine.getBytes();
            DatagramPacket dp = new DatagramPacket(bytes,bytes.length, InetAddress.getByName("192.168.1.55"),10);
            ds.send(dp);
            if("6了".equals(line)){
                break;
            }
        }
        ds.close();
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

启动接收端,启动客户端,然后把客户端的名字改一下,再启动一次客户端,此时一共启动了2个客户端

package com.wangLuo;

import java.io.*;
import java.net.*;
import java.util.Date;

/**
 * @author 林高禄
 * @create 2020-05-22-16:56
 */
public class Send {

    private String name;
    public Send(String name) {
        this.name = name;
    }

    public static void main(String[] args) throws IOException {
        Send send = new Send("徐辉强");
        send.send();
    }
    private void send() throws IOException {
        DatagramSocket ds = new DatagramSocket();
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String line;
        while((line = br.readLine())!= null){
            String newLine = this.getName()+"--"+new Date().toString()+"\n\r"+line;
            byte[] bytes = newLine.getBytes();
            DatagramPacket dp = new DatagramPacket(bytes,bytes.length, InetAddress.getByName("192.168.1.55"),10);
            ds.send(dp);
            if("6了".equals(line)){
                break;
            }
        }
        ds.close();
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

那么就进入连天了,以下是聊天记录

客户端的记录:

UDP聊天室

UDP聊天室

 

接收端的聊天记录:

UDP聊天室