在两个网络端口之间切换Java_Java_Networking_Network Programming_Publish Subscribe

在两个网络端口之间切换Java

java networking network-programming

在两个网络端口之间切换Java,java,networking,network-programming,publish-subscribe,Java,Networking,Network Programming,Publish Subscribe,我正试图从发布者文件（在端口8000上发送）发送一条消息，该消息由服务器接收（在端口5000和8000上侦听），并将消息转发给订阅者（在端口5000上侦听）。问题是，发布服务器和服务器之间的通信正常，但是，我无法将消息转发给订阅服务器，因为服务器仍在侦听发布服务器并切换到订阅服务器端口并转发消息。欢迎提出任何建议出版商 package serverclient; import java.net.*; import java.io.*; public class Pub

我正试图从发布者文件（在端口8000上发送）发送一条消息，该消息由服务器接收（在端口5000和8000上侦听），并将消息转发给订阅者（在端口5000上侦听）。问题是，发布服务器和服务器之间的通信正常，但是，我无法将消息转发给订阅服务器，因为服务器仍在侦听发布服务器并切换到订阅服务器端口并转发消息。欢迎提出任何建议

出版商

   package serverclient;
   import java.net.*;
   import java.io.*;

   public class Publisher {
      public static void main (String [] args) throws IOException{

    Socket sock = new Socket("127.0.0.1",8000);

    // reading from keyboard (keyRead object)
    BufferedReader keyRead = new BufferedReader(new InputStreamReader(System.in));

    // sending to client (pwrite object)
    OutputStream ostream = sock.getOutputStream(); 
    PrintWriter pwrite = new PrintWriter(ostream, true);

    InputStream istream = sock.getInputStream();
    BufferedReader receiveRead = new BufferedReader(new InputStreamReader(istream));

    System.out.println("Start the chitchat, type and press Enter key");

    String receiveMessage,sendMessage;               
    while(true)
    {
        sendMessage = keyRead.readLine();  // keyboard reading
        pwrite.println(sendMessage);       // sending to server
        pwrite.flush();                    // flush the data  

        if((receiveMessage = receiveRead.readLine()) != null) //receive from server
        {
            System.out.println(receiveMessage); // displaying at DOS prompt
        }  
        else{
            System.out.print("Null");
        }
    }

}
    }

  package serverclient;

  import java.io.BufferedReader;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.InputStreamReader;
  import java.io.OutputStream;
  import java.io.PrintWriter;
  import java.net.Socket;


   public class Subscriber {
      public static void main (String [] args) throws IOException{

    Socket sock = new Socket("127.0.0.1",5000);

  // receiving from server ( receiveRead  object)
    InputStream istream = sock.getInputStream();
    BufferedReader receiveRead = new BufferedReader(new InputStreamReader(istream));

    System.out.println("Recive side");
    System.out.print("Connection Status: " + sock.isConnected() + "  " + sock.getPort());

    String receiveMessage, sendMessage;  
    while(true)
    {
        System.out.print("Hey man " + receiveRead.readLine() + "\n");
        if((receiveMessage = receiveRead.readLine()) != null) //receive from server
        {
            System.out.println(receiveMessage); // displaying at DOS prompt
            break;
        }  
        else{
            System.out.print("Null");
        }
    }

}
 }

 package serverclient;
 import java.io.*;
 import java.net.*;

 public class Server extends Thread{
     private Socket socket;
     private int clientNumber;

public Server(Socket socket, int clientNumber){
    this.socket  = socket;
    this.clientNumber = clientNumber;
    if(socket.getLocalPort() == 5000)System.out.print("\nSubscriber "+ clientNumber +" is connected to the server");
    if(socket.getLocalPort() == 8000)System.out.print("\nPublisher "+ clientNumber +" is connected to the server");
} 

@Override
public void run(){
    try {
        BufferedReader dStream = new BufferedReader(new InputStreamReader(socket.getInputStream()));
        PrintWriter out = new PrintWriter(socket.getOutputStream(), true);

        System.out.print("\nSocket Address "+ socket.getLocalPort() + "   " + socket.getPort());

        while(true){
            if ( socket.getInputStream().available() != 0 && socket.getLocalPort() == 8000 ){
                synchronized(this){
                    String clMessage = dStream.readLine();
                    System.out.println(clMessage);
                    out.println("Hey the publisher has sent the message :  " + clMessage);

                }
            }else if (socket.getInputStream().available() != 0 && socket.getLocalPort() == 5000 ){
                out.println("Hey man I am so good");
            }
        }

    } catch (IOException ex) {
        System.out.print("\nError has been handled 1\n");
    }finally{
        try {
            socket.close();
        } catch (IOException ex) {
            System.out.print("\nError has been handled 2\n");
        }
    }

}

public static void main(String [] args) throws IOException{
    int subNumber = 0;
    int pubNumber = 0;
    ServerSocket servSockpub = new ServerSocket(8000);   
    ServerSocket servSocksub = new ServerSocket(5000);
    try {
        while (true) {
            Server servpub = new Server(servSockpub.accept(),++pubNumber);
            servpub.start();
            System.out.print("\nThe server is running on listen port "+ servSockpub.getLocalPort());
            Server servsub = new Server(servSocksub.accept(),++subNumber);
            servsub.start();
            System.out.print("\nThe server is running on listen port "+ servSocksub.getLocalPort());
        }
    } finally {
        servSockpub.close();
        servSocksub.close();
    }
}

}

订户

   package serverclient;
   import java.net.*;
   import java.io.*;

   public class Publisher {
      public static void main (String [] args) throws IOException{

    Socket sock = new Socket("127.0.0.1",8000);

    // reading from keyboard (keyRead object)
    BufferedReader keyRead = new BufferedReader(new InputStreamReader(System.in));

    // sending to client (pwrite object)
    OutputStream ostream = sock.getOutputStream(); 
    PrintWriter pwrite = new PrintWriter(ostream, true);

    InputStream istream = sock.getInputStream();
    BufferedReader receiveRead = new BufferedReader(new InputStreamReader(istream));

    System.out.println("Start the chitchat, type and press Enter key");

    String receiveMessage,sendMessage;               
    while(true)
    {
        sendMessage = keyRead.readLine();  // keyboard reading
        pwrite.println(sendMessage);       // sending to server
        pwrite.flush();                    // flush the data  

        if((receiveMessage = receiveRead.readLine()) != null) //receive from server
        {
            System.out.println(receiveMessage); // displaying at DOS prompt
        }  
        else{
            System.out.print("Null");
        }
    }

}
    }

  package serverclient;

  import java.io.BufferedReader;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.InputStreamReader;
  import java.io.OutputStream;
  import java.io.PrintWriter;
  import java.net.Socket;


   public class Subscriber {
      public static void main (String [] args) throws IOException{

    Socket sock = new Socket("127.0.0.1",5000);

  // receiving from server ( receiveRead  object)
    InputStream istream = sock.getInputStream();
    BufferedReader receiveRead = new BufferedReader(new InputStreamReader(istream));

    System.out.println("Recive side");
    System.out.print("Connection Status: " + sock.isConnected() + "  " + sock.getPort());

    String receiveMessage, sendMessage;  
    while(true)
    {
        System.out.print("Hey man " + receiveRead.readLine() + "\n");
        if((receiveMessage = receiveRead.readLine()) != null) //receive from server
        {
            System.out.println(receiveMessage); // displaying at DOS prompt
            break;
        }  
        else{
            System.out.print("Null");
        }
    }

}
 }

 package serverclient;
 import java.io.*;
 import java.net.*;

 public class Server extends Thread{
     private Socket socket;
     private int clientNumber;

public Server(Socket socket, int clientNumber){
    this.socket  = socket;
    this.clientNumber = clientNumber;
    if(socket.getLocalPort() == 5000)System.out.print("\nSubscriber "+ clientNumber +" is connected to the server");
    if(socket.getLocalPort() == 8000)System.out.print("\nPublisher "+ clientNumber +" is connected to the server");
} 

@Override
public void run(){
    try {
        BufferedReader dStream = new BufferedReader(new InputStreamReader(socket.getInputStream()));
        PrintWriter out = new PrintWriter(socket.getOutputStream(), true);

        System.out.print("\nSocket Address "+ socket.getLocalPort() + "   " + socket.getPort());

        while(true){
            if ( socket.getInputStream().available() != 0 && socket.getLocalPort() == 8000 ){
                synchronized(this){
                    String clMessage = dStream.readLine();
                    System.out.println(clMessage);
                    out.println("Hey the publisher has sent the message :  " + clMessage);

                }
            }else if (socket.getInputStream().available() != 0 && socket.getLocalPort() == 5000 ){
                out.println("Hey man I am so good");
            }
        }

    } catch (IOException ex) {
        System.out.print("\nError has been handled 1\n");
    }finally{
        try {
            socket.close();
        } catch (IOException ex) {
            System.out.print("\nError has been handled 2\n");
        }
    }

}

public static void main(String [] args) throws IOException{
    int subNumber = 0;
    int pubNumber = 0;
    ServerSocket servSockpub = new ServerSocket(8000);   
    ServerSocket servSocksub = new ServerSocket(5000);
    try {
        while (true) {
            Server servpub = new Server(servSockpub.accept(),++pubNumber);
            servpub.start();
            System.out.print("\nThe server is running on listen port "+ servSockpub.getLocalPort());
            Server servsub = new Server(servSocksub.accept(),++subNumber);
            servsub.start();
            System.out.print("\nThe server is running on listen port "+ servSocksub.getLocalPort());
        }
    } finally {
        servSockpub.close();
        servSocksub.close();
    }
}

}

服务器

   package serverclient;
   import java.net.*;
   import java.io.*;

   public class Publisher {
      public static void main (String [] args) throws IOException{

    Socket sock = new Socket("127.0.0.1",8000);

    // reading from keyboard (keyRead object)
    BufferedReader keyRead = new BufferedReader(new InputStreamReader(System.in));

    // sending to client (pwrite object)
    OutputStream ostream = sock.getOutputStream(); 
    PrintWriter pwrite = new PrintWriter(ostream, true);

    InputStream istream = sock.getInputStream();
    BufferedReader receiveRead = new BufferedReader(new InputStreamReader(istream));

    System.out.println("Start the chitchat, type and press Enter key");

    String receiveMessage,sendMessage;               
    while(true)
    {
        sendMessage = keyRead.readLine();  // keyboard reading
        pwrite.println(sendMessage);       // sending to server
        pwrite.flush();                    // flush the data  

        if((receiveMessage = receiveRead.readLine()) != null) //receive from server
        {
            System.out.println(receiveMessage); // displaying at DOS prompt
        }  
        else{
            System.out.print("Null");
        }
    }

}
    }

  package serverclient;

  import java.io.BufferedReader;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.InputStreamReader;
  import java.io.OutputStream;
  import java.io.PrintWriter;
  import java.net.Socket;


   public class Subscriber {
      public static void main (String [] args) throws IOException{

    Socket sock = new Socket("127.0.0.1",5000);

  // receiving from server ( receiveRead  object)
    InputStream istream = sock.getInputStream();
    BufferedReader receiveRead = new BufferedReader(new InputStreamReader(istream));

    System.out.println("Recive side");
    System.out.print("Connection Status: " + sock.isConnected() + "  " + sock.getPort());

    String receiveMessage, sendMessage;  
    while(true)
    {
        System.out.print("Hey man " + receiveRead.readLine() + "\n");
        if((receiveMessage = receiveRead.readLine()) != null) //receive from server
        {
            System.out.println(receiveMessage); // displaying at DOS prompt
            break;
        }  
        else{
            System.out.print("Null");
        }
    }

}
 }

 package serverclient;
 import java.io.*;
 import java.net.*;

 public class Server extends Thread{
     private Socket socket;
     private int clientNumber;

public Server(Socket socket, int clientNumber){
    this.socket  = socket;
    this.clientNumber = clientNumber;
    if(socket.getLocalPort() == 5000)System.out.print("\nSubscriber "+ clientNumber +" is connected to the server");
    if(socket.getLocalPort() == 8000)System.out.print("\nPublisher "+ clientNumber +" is connected to the server");
} 

@Override
public void run(){
    try {
        BufferedReader dStream = new BufferedReader(new InputStreamReader(socket.getInputStream()));
        PrintWriter out = new PrintWriter(socket.getOutputStream(), true);

        System.out.print("\nSocket Address "+ socket.getLocalPort() + "   " + socket.getPort());

        while(true){
            if ( socket.getInputStream().available() != 0 && socket.getLocalPort() == 8000 ){
                synchronized(this){
                    String clMessage = dStream.readLine();
                    System.out.println(clMessage);
                    out.println("Hey the publisher has sent the message :  " + clMessage);

                }
            }else if (socket.getInputStream().available() != 0 && socket.getLocalPort() == 5000 ){
                out.println("Hey man I am so good");
            }
        }

    } catch (IOException ex) {
        System.out.print("\nError has been handled 1\n");
    }finally{
        try {
            socket.close();
        } catch (IOException ex) {
            System.out.print("\nError has been handled 2\n");
        }
    }

}

public static void main(String [] args) throws IOException{
    int subNumber = 0;
    int pubNumber = 0;
    ServerSocket servSockpub = new ServerSocket(8000);   
    ServerSocket servSocksub = new ServerSocket(5000);
    try {
        while (true) {
            Server servpub = new Server(servSockpub.accept(),++pubNumber);
            servpub.start();
            System.out.print("\nThe server is running on listen port "+ servSockpub.getLocalPort());
            Server servsub = new Server(servSocksub.accept(),++subNumber);
            servsub.start();
            System.out.print("\nThe server is running on listen port "+ servSocksub.getLocalPort());
        }
    } finally {
        servSockpub.close();
        servSocksub.close();
    }
}

}

我认为服务器端口没有问题（没有重复/冲突）

但是您没有任何代码在两个套接字之间桥接数据

基本上，您应该有一台服务器来接收两个套接字，并在in1-out2之间移动数据

同样要小心，在您的代码中，您只能在发布服务器连接后才能连接订阅服务器。

您尝试了什么？我们需要看一些代码，看看你做了什么，以及如何做的建议。