Question

任务是通过网桥从客户端向服务器发送消息和从服务器通过网桥回复到客户端。

我已经完成了第一部分，但无法完成第二步，即服务器通过网桥回复客户端。

客户端能够通过创建的网桥向服务器发送第一条消息，但是到达服务器后，服务器应使用无效的已修改代码进行回复。

任何接近目标的建议或指导都会有所帮助。

预先感谢

我的代码是

客户

import java.io.*;
import java.net.*;

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

   //getting input from the user and sending to Bridge
  BufferedReader inFromUser =
     new BufferedReader(new InputStreamReader(System.in));
  DatagramSocket clientSocket = new DatagramSocket();
  InetAddress IPAddress = InetAddress.getByName("localhost");
  byte[] sendData = new byte[1024];
  byte[] receiveData = new byte[1024];
  String sentence = inFromUser.readLine();


  sendData = sentence.getBytes();
  DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length, IPAddress, 4000);
  clientSocket.send(sendPacket);

  //Getting data from the Bridge
  DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);
  clientSocket.receive(receivePacket);
  String modifiedSentence = new String(receivePacket.getData());
  System.out.println("C: FROM SERVER:" + modifiedSentence);
  clientSocket.close();
}
}

服务器

    import java.io.*;
import java.net.*;

class UDPServer
{
   public static void main(String args[]) throws Exception
      {
         DatagramSocket serverSocket = new DatagramSocket(5000);
            byte[] receiveData = new byte[1024];
            byte[] sendData = new byte[1024];

            while(true)
               {
                   //receiveing data from the bridge
                  DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);
                  serverSocket.receive(receivePacket);
                  String sentence = new String( receivePacket.getData());
                  System.out.println("S:RECEIVED: " + sentence);

                  InetAddress IPAddress = InetAddress.getByName("localhost");


                  // Sending data to the bridge
                  int port = 4000;
                  String capitalizedSentence = sentence.toUpperCase();
                  sendData = capitalizedSentence.getBytes();
                  DatagramPacket sendPacket =
                  new DatagramPacket(sendData, sendData.length, IPAddress, port);
                  serverSocket.send(sendPacket);
               }
      }
   }

桥

 import java.io.*;
import java.net.*;

/**
 * Write a description of class Bridge here.
 *
 * @author (your name)
 * @version (a version number or a date)
 */
public class Bridge
{
   public static void main(String args[]) throws Exception{

       DatagramSocket bridgeSocket1 = new DatagramSocket(4000);
       DatagramSocket bridgeSocket2 = new DatagramSocket();

       byte[] receiveData = new byte[1024];
       byte[] sendData = new byte[1024];

       DatagramPacket  receivePacket;
       DatagramPacket  sendPacket;
       InetAddress  IPAddress = InetAddress.getByName("localhost");


       while(true){

           //Receiveing data from the UDPClient
           receivePacket = new DatagramPacket(receiveData, receiveData.length);
           bridgeSocket1.receive(receivePacket);  


           //Sending data to UDPServer
           String sentence = new String(receivePacket.getData());
           System.out.println("B: Data Received:" + sentence); 
           int port = 5000;
           sendData = sentence.getBytes();
           sendPacket = new DatagramPacket(sendData, sendData.length, IPAddress, port);
           bridgeSocket2.send(sendPacket);


           // Receiving Data from the UDPServer
           receivePacket = new DatagramPacket(receiveData,receiveData.length);
           bridgeSocket1.receive(receivePacket);


           String capitalizedSentence = new String(receivePacket.getData());
           System.out.println("Capitalized Sentence in the Bridge Class: " + capitalizedSentence);


           //Sending data to the UDPClient

           sendData = capitalizedSentence.getBytes();
           sendPacket = new DatagramPacket(sendData,sendData.length,IPAddress,5000);
           bridgeSocket2.send(sendPacket);
        }
        }
    }

UDP客户端服务器桥

0 个答案: