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基于socket和udp协议实现简单的聊天室系统(多人群聊)
功能介绍:
1.进入聊天室时,判断用户名是否重复
2.某个成员进入聊天室后给其他所有所有成员发送消息
3.任何一个人发消息,其他人都会收到
4.某人退出聊天室,其他成员也会收到通知
5.服务器记录当前聊天室的人数