用java写的即时通信系统，功能几使用方法类似QQ，采用C/S架构，数据库采用aceess实现，对于有一定java基础的程序员来说是不错的借鉴示例-Using java to write real-time communication system, functions of several similar use QQ, using C/S architecture, the database used aceess to achieve, for a certain java based p