基于Java技术的一个办公信息管理系统，包括用户身份验证模块、职工信息管理模块、个人通讯录模块、日程安排模块、工作日志模块、短消息管理模块、公告管理模块、会议管理模块、文件管理模块等-An office information management system based on Java technology, including user authentication module, employee information management module, personal address book work module, scheduling module, log module, short message management module, public announcement management module, conference management module, file management module, etc