一个简单的TCP 客户端，使用QTcpSocket连接服务器，发送和接受信息-A simple TCP client, use QTcpSocket connection server, sending and receiving information

Qt多线程实现多个客服端和服务器进行通信，使用的类QTcpServer和QTcpSocket以及线程(Multithreading realizes the communication between multiple client terminals and servers)