目 录
摘要.................................................................................................................................................................................I
ABSTRACT .................................................................................................................................................................II
前言 ................................................................................................................................................................................1
1 项目概述 ..................................................................................................................................................................2
1.1 本课题研究的意义 .............................................................................................................................................2
1.2 系统设计原理.....................................................................................................................................................2
1.3 系统目标 .............................................................................................................................................................3
2 可行性研究 ..............................................................................................................................................................4
2.1 技术可行性.......................................................................................................................................................4
2.2 经济可行性.......................................................................................................................................................4
2.3 操作可行性.......................................................................................................................................................4
2.4 法律可行性.......................................................................................................................................................5
3 需求分析 ..................................................................................................................................................................6
3.1 系统需要解决的主要问题...............................................................................................................................6
3.2 系统具备的基本功能.......................................................................................................................................6
3.3 数据流图...........................................................................................................................................................6
3.4 数据字典...........................................................................................................................................................8
3.4.1 数据存储.....................................................................................................................................................8
3.4.2
数据流
........................................................................................................................................................9
3.4.3
数据处理
..................................................................................................................................................10
4 总体设计 ................................................................................................................................................................11
4.1 概述.................................................................................................................................................................11
4.2 系统功能划分.................................................................................................................................................12
4.2.1
学生考试子系统功能划分
......................................................................................................................12
4.2.2
教师操作子系统功能划分
......................................................................................................................13
4.3 系统功能描述.................................................................................................................................................13
4.3.1
学生考试子系统功能描述
......................................................................................................................13
4.3.2
教师子系统功能描述
..............................................................................................................................14
4.4 数据库概念结构设计.....................................................................................................................................14
4.4.1
各实体属性图如下所示:
......................................................................................................................15
4.4.2
各实体之间的
E-R
图
..............................................................................................................................16
4.4.3
各实体之间的关系总
E-R
图
.............................................................................................................17
4.5 数据库设计 .......................................................................................................................................................17
4.6 安全保密设计.................................................................................................................................................20
4.6.1
登陆用户的安全性
..................................................................................................................................20
4.6.2
数据安全性
..............................................................................................................................................20
5 详细设计 ................................................................................................................................................................21