UDP java

最新推荐文章于 2024-08-27 11:00:00 发布

原创最新推荐文章于 2024-08-27 11:00:00 发布 · 759 阅读

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


public class UDPServer {
	public static void main(String[] args) throws IOException  {
		
		try {
			DatagramSocket ds = new DatagramSocket(666);
			
			byte[] buf = new byte[1024];
			DatagramPacket dp = new DatagramPacket(buf, buf.length);
			
			ds.receive(dp);
			
			byte[] data = dp.getData();
			int length = dp.getLength();
			InetAddress ipClient = dp.getAddress();
			int port = dp.getPort();
			
			String str = new String(data, 0, length);
			System.out.println("Server received:"+str);
			
			String dataout = "hellow udpClient, i have received";
			DatagramPacket dpout = new DatagramPacket(dataout.getBytes(), dataout.length(), ipClient, port);
			ds.send(dpout);
			
			ds.close();
			
		} catch (SocketException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		
	}
}

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

public class UDPClient {
	public static void main(String[] args) {

		try {
			DatagramSocket ds = new DatagramSocket();
			
			String data = "hellow udpserver";
			DatagramPacket dp = new DatagramPacket(data.getBytes(),
								data.length(),
							        InetAddress.getLocalHost(),
								666
								);
			ds.send(dp);
			
			byte[] buf = new byte[1024];
			DatagramPacket dpIn = new DatagramPacket(buf, buf.length);
			ds.receive(dpIn);
			System.out.println(new String(dpIn.getData(), 0, dpIn.getLength()));
			
			ds.close();
			
		} catch (SocketException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}