说明：  可行性研究方法；所建系统应用到了delphi7 和sql server 2000 通过delphi的控件把数据库连入程序中；采用螺旋模型多次对系统进行分析直到系统完成。
(Feasibility study methods built the system applied to delphi7 and sql server 2000 through delphi controls the database connection into the program spiral model to analyze the system several times until the system has completed.)