Question

multicastsocket可以用socket连接吗

Answer 1

/**
* 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 stub
MulticastSocket 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 block
e.printStackTrace();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

}
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/**
* 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 stub
MulticastSocket 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 block
e.printStackTrace();
} // 接收数据时需要指定监听的端口号

}

}