网上购物系统每个例子文件夹都附有数据库表、程序源文件和一个war包（或者jar包）。如果是cs结构的，那么是个jar包，而且还多一个可执行程序文件夹，-Each of the examples folder of the online shopping system with a database table, the program source file and a war bag (or jar file). If cs is the structure, then a jar packa