简单的UDP程序

接受端：

package com.dcz.udp;

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;

public class Receive {

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

		DatagramSocket receive = new DatagramSocket(17002);

		byte[] buf = new byte[1024];

		DatagramPacket datagramPacket = new DatagramPacket(buf, 1024);
		receive.receive(datagramPacket);

		String str = new String(datagramPacket.getData(), 0 , datagramPacket.getLength());

		System.out.println("接受数据：" + str);

		receive.close();
	}
}

　　

发送端：

package com.dcz.udp;

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;

public class Send {

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

		String data = "带发送的数据！";

		DatagramSocket send = new DatagramSocket(17006);

		DatagramPacket datagramPacket = new DatagramPacket(
				data.getBytes(),
				data.getBytes().length,
				InetAddress.getLocalHost(),
				17002);

		send.send(datagramPacket);

		send.close();

	}

}