Java简易聊天室程序socket

chatroomdemo.java

package com.socket.demo;

import java.io.IOException;

import java.net.DatagramSocket;

public class ChatRoomDemo {

/**

* @param args

* @throws IOException

*/

public static void main(String[] args) throws IOException {

System.out.println("----进入聊天室----");

DatagramSocket send = new DatagramSocket();

DatagramSocket rece = new DatagramSocket(10001);

new Thread(new SendDemo(send)).start();// 启动发送端线程

new Thread(new ReceiveDemo(rece)).start();// 启动接收端线程

}

}

SendDemo.java

package com.socket.demo;

import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.net.DatagramPacket;

import java.net.DatagramSocket;

import java.net.InetAddress;

public class SendDemo implements Runnable {

private DatagramSocket ds;

// 有参数构造函数

public SendDemo(DatagramSocket ds) {

this.ds = ds;

}

@Override

public void run() {

try {

BufferedReader bufr = new BufferedReader(new InputStreamReader(

System.in));

String line = null;

while ((line = bufr.readLine()) != null) {

byte[] buf = line.getBytes();

/*

* //192.168.1.255是ip段广播地址，发给这个IP的信息，

* 在192.168.1.1-192.168.1.255的ip段的所有IP地址都能收到消息

*/

DatagramPacket dp = new DatagramPacket(buf, buf.length,

InetAddress.getByName("192.168.1.255"), 10001);

ds.send(dp);

if ("886".equals(line))

break;

}

ds.close();

} catch (Exception e) {

}

}

}

ReceiveDemo.java

package com.socket.demo;

import java.net.DatagramPacket;

import java.net.DatagramSocket;

public class ReceiveDemo implements Runnable {

private DatagramSocket ds;

public ReceiveDemo(DatagramSocket ds) {

this.ds = ds;

}

@Override

public void run() {

try {

while (true) {

// 2,创建数据包。

byte[] buf = new byte[1024];

DatagramPacket dp = new DatagramPacket(buf, buf.length);

// 3,使用接收方法将数据存储到数据包中。

ds.receive(dp);// 阻塞式的。

// 4，通过数据包对象的方法，解析其中的数据,比如，地址，端口，数据内容。

String ip = dp.getAddress().getHostAddress();

int port = dp.getPort();

System.out.println("----port-----" + port);

String text = new String(dp.getData(), 0, dp.getLength());

System.out.println(ip + "::" + text);

if (text.equals("886")) {

System.out.println(ip + "....退出聊天室");

}

}

} catch (Exception e) {

}

}

}

运行效果图：