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 stubScanner 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 stubScanner 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);}}

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