private void sendMsgByLongTcp(String clientName) {
		if (ClientThread.channelFuture == null) {
			return;
		}
		Channel channel = ClientThread.channelFuture.getChannel();
		if (channel != null && channel.isOpen() && channel.isConnected()
				&& channel.isWritable()) {
			System.out.println("客户端利用连接: " + channel + " 发送消息");
			String s = clientName + " say Hello";
			channel.write(s);
		}
	}