客戶端服務器通信受阻於客戶端

Question

我正在寫一個簡單的本地客戶端 - 服務器程序，應做到以下幾點：

1. 客戶端發送了他的名字服務器（「客戶端1」）
2. 服務器返回一個字符串說「你好客戶端1」

我遇到的問題是，「你好客戶端1」郵件永遠不會恢復，而是程序只是不斷沒有拋出任何異常或故障運行。我猜測它與阻止bufferedReader的readLine方法有關，但我還沒有找到適當的解決方案。要在本地運行程序（請參見Main），我使用了serverThread和clientThread，也許這也是問題的一部分。

注意：在下面的代碼，我把一個註釋塊上，似乎導致問題的線路，其餘代碼罰款運行：

服務器：

public class Serverside implements Runnable{ 
    PrintStream out; 
    int port; 

    Serverside(int port){ 
     out = new PrintStream(System.out); 
     this.port = port; 
    } 

    void start(){ 
     try{ 
      ServerSocket serverSocket = new ServerSocket(port); 
      Socket connSocket = serverSocket.accept(); 

      BufferedReader clientInput = new BufferedReader(new InputStreamReader(connSocket.getInputStream())); 
      DataOutputStream clientOutput = new DataOutputStream(connSocket.getOutputStream()); 

      String clientName = clientInput.readLine(); 
      String reply = "Hello " + clientName + "\n"; 

      //clientOutput.writeBytes(reply); 

      clientOutput.close(); 
      clientInput.close(); 
      connSocket.close(); 
      serverSocket.close(); 
     }catch(Exception e){ 
      out.println("Server: An exception has been thrown: " + e.getMessage()); 
     } 
    } 

    @Override 
    public void run() { 
     out.println("Server running"); 
     start(); 
    } 
} 

客戶端：

public class ClientSide implements Runnable { 

    String hostname; 
    String clientName; 
    int port; 

    public ClientSide(String name, int port) { 
     hostname = "localhost"; 
     this.port = port; 
     clientName = name; 
    } 

    void start(){ 
     try{ 
      Socket connSocket = new Socket(hostname, port); 

      BufferedReader serverInput = new BufferedReader(new InputStreamReader(connSocket.getInputStream())); 
      DataOutputStream serverOutput = new DataOutputStream(connSocket.getOutputStream()); 

      serverOutput.writeBytes(clientName); 

      //String reply = serverInput.readLine(); 
      //System.out.println("Server says: " + reply); 

      serverOutput.close(); 
      serverInput.close(); 
      connSocket.close(); 
     }catch(Exception e){ 
      System.out.println("Client: An exception has been thrown: " + e.getStackTrace().toString()); 
     } 

    } 

    @Override 
    public void run() { 
     System.out.println("Client-side running"); 
     start(); 
    } 
} 

主營：

public class Main { 

    static final int PORT = 20000; 

    void start() { 
     Serverside server = new Serverside(PORT); 
     ClientSide client = new ClientSide("Elias",PORT); 

     Thread serverThread = new Thread(server); 
     Thread clientThread = new Thread(client); 

     clientThread.start(); 
     serverThread.start(); 
    } 

    public static void main(String[] args) { 
     new Main().start(); 
    } 

} 

Answer 1

您正在閱讀線路，但您並未發送線路。您需要將一個行終止符添加到客戶端名稱。