MulticastSocket 使用

来源：互联网发布：windows xp一键重装编辑：程序博客网时间：2024/06/04 20:14

/** * ServerMulticastSocketTest.java * 版权所有(C) 2014 * 创建者:cuiran 2014-1-9 下午3:22:01 */package com.udpdemo.multicast;import java.io.IOException;import java.net.DatagramPacket;import java.net.InetAddress;import java.net.MulticastSocket;import java.text.SimpleDateFormat;import java.util.Date;/** * TODO  * @author cuiran * @version 1.0.0 */public class ServerMulticastSocketTest {/** * 2014-1-9 下午3:22:01 * @param args *  */public static void main(String[] args) {// TODO Auto-generated method stubMulticastSocket multicastSocket;try {multicastSocket = new MulticastSocket();InetAddress address = InetAddress.getByName("239.0.0.1"); // 必须使用D类地址        multicastSocket.joinGroup(address); // 以D类地址为标识，加入同一个组才能实现广播                while (true) {            String time = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date());            byte[] buf = time.getBytes();            DatagramPacket datagramPacket = new DatagramPacket(buf, buf.length);            datagramPacket.setAddress(address); // 接收地址和group的标识相同            datagramPacket.setPort(10000); // 发送至的端口号                        multicastSocket.send(datagramPacket);            Thread.sleep(1000);        }} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (InterruptedException e) {// TODO Auto-generated catch blocke.printStackTrace();}        }}

/** * ClientMulticastSocketTest.java * 版权所有(C) 2014 * 创建者:cuiran 2014-1-9 下午3:24:25 */package com.udpdemo.multicast;import java.io.IOException;import java.net.DatagramPacket;import java.net.InetAddress;import java.net.MulticastSocket;/** * TODO  * @author cuiran * @version 1.0.0 */public class ClientMulticastSocketTest {/** * 2014-1-9 下午3:24:25 * @param args *  */public static void main(String[] args) {// TODO Auto-generated method stubMulticastSocket multicastSocket;try {multicastSocket = new MulticastSocket(10000); InetAddress address = InetAddress.getByName("239.0.0.1");        multicastSocket.joinGroup(address);        byte[] buf = new byte[1024];                while (true) {            DatagramPacket datagramPacket = new DatagramPacket(buf, buf.length);            multicastSocket.receive(datagramPacket); // 接收数据，同样会进入阻塞状态                        byte[] message = new byte[datagramPacket.getLength()]; // 从buffer中截取收到的数据            System.arraycopy(buf, 0, message, 0, datagramPacket.getLength());            System.out.println(datagramPacket.getAddress());            System.out.println(new String(message));        }} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();} // 接收数据时需要指定监听的端口号       }}

0 0