本java聊天室，实现了多线程编程，实现多可客户聊天，*消息 或者单发消息。并且实现了服务器端管理客户端的功能，详细请看程序的说明文档。-the java chat room and realized the multithreaded programming, customers can achieve multi-chat, single or repeated news updates. To reach the server-client management functions, p