the procedures used to establish Socket Interface

代码说明：

该程序使用了Socket接口建立通住双方的TCP连接,从而完成通信.服务器方可以与多个客户端建立连接,并且可以选择要向哪个已建立起连接的客户端发送消息.-the procedures used to establish Socket Interface-living both TCP connections, thus completing communications. Server side with the establishment of a number of client connections and can be chosen which has been established to connect the client send messages.