使用UDP实现简单多人聊天功能

使用UDP实现简单聊天功能

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使用UDP实现一个简单的多人聊天功能。该程序使用了多线程，实现了聊天功能。

package 课后作业.E103_10_聊天;import java.io.IOException;import java.net.*;import java.util.Scanner;//接收class Receive implements Runnable{    @Override    public void run() {        DatagramSocket receiveSocket = null;        try {            receiveSocket = new DatagramSocket(5200);        } catch (SocketException e) {            e.printStackTrace();        }        while (true) {            byte[] bytes = new byte[1024];            //创建一个报文，于与接收            DatagramPacket datagramPacket = new DatagramPacket(bytes, bytes.length);            //接收            try {                receiveSocket.receive(datagramPacket);            } catch (IOException e) {                e.printStackTrace();            }            InetAddress ip = datagramPacket.getAddress();            System.out.println(ip.getHostName()+ new String(datagramPacket.getData()));        }    }}//发送class Send implements Runnable{    @Override    public void run() {        DatagramSocket sendSocket = null;        try {            sendSocket = new DatagramSocket();        } catch (SocketException e) {            e.printStackTrace();        }        Scanner scan = new Scanner(System.in);        while (true) {            String str = scan.next();            //要发送的信息            byte[] bytes = str.getBytes();            //发送的目标地址            InetAddress inetAddress = null;            try {                inetAddress = InetAddress.getByName("192.168.108.32");            } catch (UnknownHostException e) {                e.printStackTrace();            }            //数据报文            DatagramPacket datagramPacket = new DatagramPacket(bytes, bytes.length, inetAddress, 5200);            //发送            try {                sendSocket.send(datagramPacket);            } catch (IOException e) {                e.printStackTrace();            }        }    }}public class Test {    public static void main(String[] args) {        Receive receive = new Receive();        Thread thread = new Thread(receive);        thread.start();        Send send = new Send();        Thread thread1 = new Thread(send);        thread1.start();    }}

运行结果：

这里实现的是两人聊天，想要实现多人聊天只需要将接受地址改成广播地址即可。