@Override
 public void sendMsg(Messages msg) {
   try {
     if (!msg.getEncryptedStatus()) {
       msg.EncryptedMe(SingletonEncryptionMethod.getInstance());
     }
     os.writeObject(msg);
     os.flush();
   } catch (IOException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
   }
 }
  @Override
  public void run() {
    while (clientSocket != null) {
      // String StringMessage=null;
      Object objectMsg;
      Messages msg;
      try {
        CommonUtils.PrintMe("The server receive a Message from client");
        objectMsg = in.readObject();
        msg = (Messages) objectMsg;
        CommonUtils.PrintMe("the thread read a message from client" + msg.toString());
        msg = this.decryptMsg(msg);
        CommonUtils.PrintMe("the message decrypted is:" + msg.getContent());
        // StringMessage=msg.getContent();
      } catch (IOException | ClassNotFoundException ex) {
        ex.printStackTrace();
        TcpChatServer.disconnect(this);
        TcpChatServer.notifyChatRoom();
        return;
      }
      if (objectMsg == null) { // the client leaved
        CommonUtils.PrintMe("warning-----------objectMsg is null");
        TcpChatServer.disconnect(this);
        TcpChatServer.notifyChatRoom();
        return;
      }
      if (msg.getMsgType() == Messages.MSG) {
        CommonUtils.PrintMe("~~~~~~~~~~~the user send a message");

        // 这里转发信息,信息的处理要在这里进行
        // #if Spamfilter

        super.FiltspamMsg(msg);

        // #endif
        msg = this.decryptMsg(msg);
        TcpChatServer.sendClients(msg); // send message to every clients
        System.out.println("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@");
        msg.printMsg();
        System.out.println("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@");

        CommonUtils.PrintMe("the message sended to all clients:");
        msg.printMsg();
      } else if (msg.getMsgType() == Messages.QUIT) {
        CommonUtils.PrintMe("the user want to disconnect");
        TcpChatServer.disconnect(this);
        TcpChatServer.notifyChatRoom();
      }
    } // end while
  }
  public ConnectedClients(Socket inputSocket) {
    clientSocket = inputSocket; // initialization of connections.
    // super.init(clientSocket);
    Object msg = null;

    try {

      os = new ObjectOutputStream(clientSocket.getOutputStream());
      in = new ObjectInputStream(clientSocket.getInputStream());
      CommonUtils.PrintMe("invoke themethod to create a instance of connected client");
      msg = in.readObject();

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

    Messages firstMsg = (Messages) msg;
    CommonUtils.PrintMe(
        "the server get the frist  message from the new client:"
            + firstMsg.getContent()
            + "是否加密:"
            + firstMsg.getEncryptedStatus()
            + "消息类型:"
            + firstMsg.getMsgType());
    firstMsg.DecryptedMe(
        SingletonEncryptionMethod.getInstance()); // use ROT13 decrypt the incomming Msg

    clientName = firstMsg.getSenderName();
    clientIp = firstMsg.getSenderIp();

    firstMsg.printMsg();

    CommonUtils.PrintMe(
        "the instance of client send a  message:---" + firstMsg.getContent() + "---");
  }
 @Override
 public Messages decryptMsg(Messages msg) {
   msg.DecryptedMe(SingletonEncryptionMethod.getInstance());
   return msg;
 }