目录1 绪论...........................................................................21.1 背景及意义................................................................11.2 讨论现状..................................................................12 系统分析.......................................................................32.1 实现技术.................................................................32.2 系统分析..................................................................63 系统设计........................................................................73.1 系统功能结构..............................................................73.2 系统业务流程..............................................................83.3 系统实现原理..............................................................83.４模块化设计...............................................................93.５ 数据库设计..............................................................93.６开发环境与运行环境......................................................103.7 客户端结构...............................................................103.8 服务器端结构.............................................................114 系统实现......................................................................114.1 新用户注册模块...........................................................114.2 登录模块................................................................134.3 消息通信模块:与显示的在线好友间通信......................................154.4 服务器端................................................................175 总结...........................................................................22参考文献........................................................................23致谢............................................................................231 绪论1.1 背景及意义网络通信在当今信息社会中起着不可或缺的作用，人们可以利用网络通信技术进行即时的信息沟通。比如 QQ 聊天工具，它就是利用...
