UDP 编程 客服咨询回复

package 网络编程_客户咨询;

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.util.Scanner;

public class sender {

    public static void main(String[] args) throws IOException {
        // TODO Auto-generated method stub
        Scanner input = new Scanner(System.in);

        do{
        InetAddress ia = null;
        ia = InetAddress.getByName("localhost");
        System.out.println("input a message:");

        String mes = input.next();
        DatagramPacket dp = new DatagramPacket(mes.getBytes(),mes.length(),ia,8806);
        DatagramSocket ds = new DatagramSocket();
        ds.send(dp);
        System.out.println("ok!sending..");
    //-------------接受------
        byte[] buf= new byte[1024];
        DatagramPacket dp1 = new DatagramPacket(buf, 1024);
        DatagramSocket ds1 = new DatagramSocket(8806);
        ds1.receive(dp1);
        String mee = new String(dp1.getData(),0,dp1.getLength());
        System.out.println(mee);
        System.out.println("receive session over!");
        ds.close();
        }while(true);
    }

}

package 网络编程_客户咨询;

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

public class receiver {

    public static void main(String[] args) throws IOException {
        // TODO Auto-generated method stub
        Scanner input = new Scanner(System.in);
        do{
        System.out.println("Session begin:");
        byte[] buf= new byte[1024];
        DatagramPacket dp = new DatagramPacket(buf, 1024);
        DatagramSocket ds = new DatagramSocket(8806);
        ds.receive(dp);
        String mee = new String(dp.getData(),0,dp.getLength());
        System.out.println(mee);
        System.out.println("receive session over!");
//-------------------------发送回复---------------------
        System.out.println("please reply:");
        String reply = input.nextLine();
        InetAddress ia = null;
        ia = InetAddress.getByName("localhost");
        DatagramPacket dpr = new DatagramPacket(reply.getBytes(),reply.length(),ia,8806);
        ds.send(dpr);
        ds.close();
        }while(true);

    }

}