多线程通信,服务器运行后等待客户端连接，连接成功，客服端发送自己的名字及字符串信息给服务器 服务器将收到的字符串信息反向排列后发回给客户端，一个服务器可以对应多个客户端-The multi thread communication and that the server is running waiting for client connection, the connection is successful, the client sends his name and string infor