UDP

我们通过以下代码来连了解以下UPD

首先我们先创建Server类

package cn.a.qwe;

import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.SocketException;

public class Server {
	public static void main(String[] args) throws Exception {
		DatagramSocket sockets=new DatagramSocket(50000);

		byte[] bytes = new byte[1024];

		DatagramPacket packet = new DatagramPacket(bytes, 0,bytes.length);

		sockets.receive(packet);

		byte[] data = packet.getData();

		String temp = new String(data,0,data.length);
		System.out.println(temp);
	}
}

紧接着我们来创建一个Client类

package cn.a.qwe;

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

public class Client {
	public static void main(String[] args) throws Exception {
		String word="开启成功";
		byte[] bytes=word.getBytes();
		DatagramSocket client = new DatagramSocket();
		DatagramPacket packet = new DatagramPacket(bytes, 0, bytes.length, InetAddress.getByName("localhost"), 50000);
		client.send(packet);
	}
}

启动之后我们可以看到当Client运行时,我们可以看到Server类会有"开启成功"的字段输出