Java基于socket实现简易聊天室实例

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   } }

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) {     }   } }

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) {     }   } }