UDP实现服务器与客户端双向通信-蒲公英云

UDP实现服务器与客户端双向通信

傷城~ 2022-08-27 13:51 375阅读 0赞

package UDPconnection;
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 Exception
    {
        DatagramSocket socket=new DatagramSocket();
        String str="nice to meet you!";
        //构造数据报包
        DatagramPacket packet =new DatagramPacket(str.getBytes(),str.length(),InetAddress.getByName("localhost"),5000);
        //发送
        socket.send(packet);
        byte []by=new byte[1024];
        DatagramPacket repacket=new DatagramPacket(by,100);
        socket.receive(repacket);
        System.out.println(new String(by,0,repacket.getLength()));
        socket.close();
    }
package UDPconnection;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.SocketException;
public class UDPclient 
{
    public static void main(String args[]) throws Exception
    {
        byte[] by=new byte[1024];
        DatagramSocket socket=new DatagramSocket(7000);
        DatagramPacket repacket=new DatagramPacket(by,by.length);
        socket.receive(repacket);
        System.out.println(new String(by,0,repacket.getLength()));
        String str="I love You!";
        DatagramPacket packet=new DatagramPacket(str.getBytes(),str.length(),repacket.getAddress(),repacket.getPort());
        socket.send(packet);
        socket.close();
    }
}