化妆品购物网站需求分析目录1.引言...................................................................................................31.1编写的目的......................................................................................................31.2化妆品购物网站的实施意义..........................................................................32.任务概述...........................................................................................42.1目标..................................................................................................................42.2.功能需求..............................................................................................................42.3.运行环境..............................................................................................................73.3.1 对功能的规定...................................................................................................83.3.2 系统流程图.......................................................................................................93.3.3 各功能模块详解.............................................................................................103.4 系统顶层活动图................................................................................................133.5 系统 E_R 图.......................................................................................................134.用例分析...............................................................................................144.1 顶层用例图........................................................................................................154.2 用例分析与描述................................................................................................154.2.1登录(logon)...............................................................................................................154.2.2注册...................................................................................................