Question

我在完成任务时偶然发现了一个死区。它是一个简单的服务器和客户端程序。该计划的细节如下;

创建一个侦听传入连接的服务器类EncryptServer。如果存在连接，请接受它并创建一个线程EncryptServerSession来处理输入和输出流。
创建一个线程类EncryptServerSession，它接收来自服务器类的输入和输出流并进行处理。
创建一个连接到服务器类的客户端类EncryptClient，并将输出流从EncryptServerSession传递到EncryptServer。

不知怎的，EncryptClient类的while循环不起作用。我似乎无法进入循环。我的代码有问题吗？提前谢谢。

加密服务器

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

public class EncryptServer
{    
    public EncryptServer() throws IOException
    {
         ServerSocket serverSocket = new ServerSocket(1122);
         System.out.println("Server started."); 

         while (true)
         {
             Socket conSocket = serverSocket.accept();
             System.out.println("Client connected from " + 
conSocket.getLocalAddress().getHostName()); 

             Thread session = new 
EncryptServerSession(conSocket.getInputStream(), 
conSocket.getOutputStream());
             session.start();
     }
}
public static void main(String[] args)
{
    try
    {
        EncryptServer server = new EncryptServer();
    }
    catch (Exception e)
    {
        System.out.println(e);
    }                                      
}

}

EncryptServerSession

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

public class EncryptServerSession extends Thread
{
    BufferedReader in;
    Writer out;

public EncryptServerSession(InputStream inStream, OutputStream outStream)
{
    Reader read = new InputStreamReader(inStream);
    in = new BufferedReader(read);
    out = new OutputStreamWriter(outStream);
}

public void strEncrypt()
{
    try
    {
        String message = in.readLine();
        out.write(message);
        out.flush();
    }
    catch (Exception e)
    {
    }
}

public void run()
{
    try
    {
        //System.out.println(in.readLine());
        out.write("Please enter the message to be encrypted: ");
        out.flush();

        //strEncrypt();

    }
    catch (Exception e)
    {
        System.out.println(e);
    }

}
}

EncryptClient

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


public class EncryptClient
{
BufferedReader input, userTerm;
Writer output;
String line;

public EncryptClient() throws IOException
{
    Socket clientSocket = new Socket("localhost", 1122);
    Reader read = new InputStreamReader(clientSocket.getInputStream());
    input = new BufferedReader(read);

    userTerm = new BufferedReader(new InputStreamReader(System.in));
    output = new OutputStreamWriter(clientSocket.getOutputStream());             

    /////////////// Somehow I cannot get into this loop, why? //////////
    while (true) 
    {
        System.out.println("test ");
        System.out.println(input.readLine());
        System.out.println("Enter message to be encrypted: ");
        output.write(userTerm.readLine());        
        output.flush();
    }
    /////////////// Somehow I cannot get into this loop, why? //////////
}

public static void main(String[] args)
{
    try
    {
      EncryptClient client = new EncryptClient();
    }
    catch (Exception e)
    {
        System.out.println(e);
    }
}

}

Answer 1

据我了解，您正在尝试向服务器发送消息，执行某些逻辑，然后将其发送回客户端。上面的代码似乎在我身边运行良好。这就是我所做的：

首先运行EncryptServer。我希望这是你面临的问题。或者你的防火墙不允许你听套接字。

在EncryptServerSession中，你正在读行，但你不是在写行。要么close流，要么在完成后写一个新行。

...

out.write(message);
out.write("\r\n"); // write new line
out.flush();

...

} finally {
    try {
      out.close();
    } catch (IOException e) {
    }
}

OR

...

out.write(message);
out.write("\r\n"); // write new line
out.flush();

...

简单的客户端服务器Java程序不会进入while循环

1 个答案: