boolean commandABOR()
	    {
	        try
	        {
	            dataSocket.close();
	        }
	        catch(Exception e)
	        {
	            e.printStackTrace();
	            reply = "451 请求失败: 传输出故障";
	            return false; 
	        }
	        reply = "421 服务不可用, 关闭数据传送连接";
	        return false;
	    }