客戶端無法從服務器接收信息

我想從服務器發送文件信息到客戶端，但無法接收客戶端的信息。我認爲這是一個錯誤的流，但無法找到它。客戶端無法從服務器接收信息

我調試代碼，我看到，當涉及到線上的信息是讀好，但隨後壞事happend：

while ((readLine = read.readLine()) != null) {

這是null，一切都結束。

public class Server { 
    private String urlFile = "http://riemann.fmi.uni-ofia.bg/vladov/students/boil.txt"; 
    private ServerSocket serverSocket = null; 
    private BufferedReader read = null; 
    private BufferedWriter write = null; 
    private FileReader fileReader = null; 
    URLConnection urlConnection = null; 

    void acceptConnection() { 
     try { 
      serverSocket = new ServerSocket(3000); 
      Socket client = null; 
      while (true) { 
       client = serverSocket.accept(); 
       handleConnection(client); 
      } 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
    } 

    private void handleConnection(Socket clientSocket) { 
     try { 
      URL url = new URL(urlFile); 
      urlConnection = url.openConnection(); 
      read = new BufferedReader(new InputStreamReader(
        urlConnection.getInputStream())); 

      write = new BufferedWriter(new OutputStreamWriter(
        clientSocket.getOutputStream())); 
      String readLine = null; 
      while ((readLine = read.readLine()) != null) { 
       write.write(readLine); 
       write.flush(); 
      } 

     } catch (MalformedURLException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } catch (IOException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 
    } 

    private void tearDownConnection() { 
     try { 
      write.close(); 
      read.close(); 
      serverSocket.close(); 
     } catch (IOException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 

    } 

}

客戶：

public class Client { 
    Socket client = null; 
    BufferedReader reader = null; 
    BufferedWriter writer = null; 

    void connectToServer(String hostAddress, int port) { 
     try { 
      System.out.println("Client is waitting."); 
      client = new Socket(hostAddress, port); 
      reader = new BufferedReader(new InputStreamReader(
        client.getInputStream())); 
      writer = new BufferedWriter(new OutputStreamWriter(
        client.getOutputStream())); 
      String readedLine = null; 
      readedLine = reader.toString(); 
      while ((readedLine = reader.readLine()) != null) { 
       System.out.println(readedLine); 
      } 

     } catch (UnknownHostException e) { 
      System.out.println("Host name is unkown."); 
      e.printStackTrace(); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
    } 

    void tearDownConnection() { 
     try { 
      if (client != null) { 
       client.close(); 
      } 
      if (writer != null) { 
       writer.close(); 
      } 
      if (reader != null) { 
       reader.close(); 
      } 

     } catch (IOException e) { 
      e.printStackTrace(); 
     } 

    } 
}

來源

2012-12-15 Xelian

http://riemann.fmi.uni-ofia.bg/vladov/students/boil.txt上是否有任何內容？ –

是的。當我調試時，我發現有東西在讀。你必須在http：//之前輸入 – Xelian

嘿，不是正確的地址：http://riemann.fmi.uni-sofia.bg/vladov/students/boil.txt？我認爲你正在閱讀的數據只是HTTP 404響應。 – user35443

客戶機正在等待線，而服務器不發送這個（即，由一個返回/換行符終止）。您可以在服務器中自行添加換行符：

while ((readLine = read.readLine()) != null) { 
    write.write(readLine+"\n"); 
    write.flush(); 
}

來源

2012-12-15 18:50:19 user1885297

謝謝@ user1885297你拯救了我的生命 – Xelian

客戶端無法從服務器接收信息

回答

相關問題