校园卡系统设计方案，关于现行系统介绍、新系统目标确定、系统业务流程图分析、系统数据流程图分析、数据库E-R图，数据表结构/数据字典确定,-The design of campus card system, introduced on the existing system and the new system targeting system business process diagrams, flow chart of the system data analysis, database E