multicastsocketserverdemo.java

java实现ftp功能。其中含有一个监听端口并提供HTML文档的程序.内容

import java.io.*;
import java.net.*;

class MulticastSocketServerDemo{
	public static void main (String[] args) throws IOException{
		System.out.println ("组播服务器启动...\n"); 
		MulticastSocket s = new MulticastSocket ();//建立组播套接字
		InetAddress group = InetAddress.getByName ("228.5.6.7");
		byte [] dummy = new byte [0];
		
		//创建组播数据包并发送
		DatagramPacket dgp = new DatagramPacket (dummy,0,group,6789);
		for (int i = 0; i < 30000; i++){
			byte [] buffer = ("足球赛 " + i).getBytes ();
			dgp.setData (buffer);
			dgp.setLength (buffer.length);
			s.send (dgp);
		}
		// 关闭套接字
		s.close ();
	}
}