Udp网络编程

发送方程序UdpSender.java：

import java.net.*;

public class UdpSender
{
	public static void main(String[] args) 
	{
		/*发送数据包*/
		String str = "Hello,you!";
		byte buffer[] = str.getBytes();
		try
		{
			InetAddress address = InetAddress.getByName("127.0.0.1");
			DatagramPacket data_pack = new DatagramPacket(buffer,buffer.length,address,666);
			DatagramSocket mail_data = new DatagramSocket();
			while(true)
			{
				mail_data.send(data_pack);
				Thread.sleep(1000);
			}
		}
		catch (Exception e)
		{
		}
	}
}

接收方程序UdpReceiver.java：

import java.net.*;

public class UdpReceiver
{
	public static void main(String[] args) 
	{
		/*接受数据包*/
		DatagramPacket pack = null;
		DatagramSocket mail_data = null;
		byte data[] = new byte[8192];
		try
		{
			pack = new DatagramPacket(data,data.length);
			mail_data = new DatagramSocket(666);
		}
		catch (Exception e)
		{
		}
		while(true)
		{
			if(mail_data == null)
				break;
			else
				try
				{
					mail_data.receive(pack);
					String message = new String(pack.getData(),0,pack.getLength());
					System.out.println("Receive message：" + message);
				}
				catch (Exception e)
				{
				}
		}
	}
}