未能接受Java中的套接字連接

Question

我正在嘗試使用服務器和客戶端來回傳遞文本字符串的簡單程序。我無法建立連接。我有一個測試打印線在套接字接受線的下面，它從不打印，所以我認爲問題在那裏，但我不知道如何做更徹底的檢查。

我已經在Eclipse中編寫了這個程序，如果這有所作爲。

這是服務器：

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

public class HW2Q1S { 

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

    try { 
     //connection 
     ServerSocket srvr = new ServerSocket(7654); 
     Socket skt = srvr.accept(); 
     System.out.println(skt.getPort()); 

     //data xfer 
     BufferedReader sIn = new BufferedReader(new InputStreamReader(skt.getInputStream())); 
     PrintWriter sOut = new PrintWriter(skt.getOutputStream(), true); 

     //string receiving 
     int count = 1; 
     String msg = ""; 

     while((msg = sIn.readLine()) != null) { 
      while(count < 11) { 
       msg = sIn.readLine(); 
       System.out.println("Received: "+ msg); 
       String returnMsg = msg.toUpperCase(); 
       System.out.println("Capped: "+ returnMsg); 
       sOut.write(returnMsg); 
       count++; 
      } 
     } //end of read from client in while loop 
     if (count == 10) { 
      System.out.println("Max reached."); 
     } 
     srvr.close(); 
     return; 
    } 

    catch(Exception e) { 
     System.out.println("Error caught: " + e); 
    } 

} // end of main 
} // end of class 

這是客戶端：

import java.util.Random; 
import java.io.*; 
import java.net.*; 

public class HW2Q1C { 

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

    String capped = ""; 
    String temp = ""; 

    try { 
     //make the connection 
     Socket skt = new Socket("localhost", 7654); 
     BufferedReader cIn = new BufferedReader(new InputStreamReader(skt.getInputStream())); 
     PrintWriter cOut = new PrintWriter(skt.getOutputStream(), true); 

     //send 11 strings 
     for (int i = 0; i < 11; i++) { 
      temp = Stringer(); 
      cOut.write(temp); 
      System.out.println("Sending: " + temp); 

     } 

     //receive server strings 
     while(cIn.readLine() != null) { 
     capped = cIn.readLine(); 
     System.out.println("From server: "+ capped); 
     } 

     skt.close(); 
    } // end of connection try block 

    catch(Exception e) { 
     System.out.print("Whoops! It didn't work!\n"); 
    } 

} //end of main 

static String Stringer() { 
    String msg, alpha; 
    msg = ""; 
    alpha = "abcdefghijklmnopqrstuvwxyz"; 
    Random rnd = new Random(); 
    for (int i = 0; i < 10; i++) { 
     msg += alpha.charAt(rnd.nextInt(25)); 
    } 
    return msg; 
} 
} //end of class 

謝謝！

Answer 1

我想我找到了你的問題。
您應該使用println而不是write。我很確定問題在於寫入不發送實際行string + \n，因此服務器無法讀取一行。
我修改您的例子一點點，使其更容易測試和理解，但是這對我的作品：

服務器：

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

public class Server { 
    public static void main(String[] args) throws Exception { 
     try { 
      //connection 
      ServerSocket srvr = new ServerSocket(7654); 
      Socket skt = srvr.accept(); 
      System.out.println(skt.getPort()); 

      BufferedReader in = new BufferedReader(new InputStreamReader(skt.getInputStream())); 

      String msg = ""; 
      while ((msg = in.readLine()) != null) { 
       System.out.println("Received: " + msg); 
      } //end of read from client in while loop 
      srvr.close(); 
     } catch (Exception e) { 
      System.out.println("Error caught: " + e); 
     } 

    } // end of main 
} // end of class 

客戶：

import java.util.Random; 
import java.io.*; 
import java.net.*; 

public class Client { 

    public static void main(String[] args) throws IOException { 
     try { 
      Socket socket = new Socket("localhost", 7654); 
      PrintWriter out = new PrintWriter(socket.getOutputStream(), true); 

      for (int i = 0; i < 11; i++) { 
       out.println(Stringer()); //<-- println instead of write 
      } 
      socket.close(); 
     } // end of connection try block 
     catch(Exception e) { 
      System.out.print(e.toString()); 
     } 

    } //end of main 

    static String Stringer() { 
     String msg, alpha; 
     msg = ""; 
     alpha = "abcdefghijklmnopqrstuvwxyz"; 
     Random rnd = new Random(); 
     for (int i = 0; i < 10; i++) { 
      msg += alpha.charAt(rnd.nextInt(25)); 
     } 
     return msg; 
    } 
} //end of class 

SERVEROUTPUT：

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