一个仿QQ的聊天程序,有添加好友,分组,陌生人,查找好友,精确查找等一些基本功能,采用定时扫描数据库方式读取信息,适合新手学习-An imitation of the QQ chat program, and add a friend, division, strangers, find friends, precision, etc. Find some of the basic functions, methods used to read regularly scan the databa