、会员注册：输入会员名，会员名应该唯一 2、会员列表: 显示所有会员信息 3、删除会员: 根据输入的用户名进行删除 4、添加商品：输入商品名、价格、描述 5、商品列表: 显示所有的商品信息 6、删除商品: 根据商品名删除单个商品 7、下单(购买)：输入用户名、商品名、数量进行下单操作 8、订单列表: 显示所有订单(包括用户名、商品名、下单数量等信息) 系统设计阶段： 1 先找名词:(Domain Model)(实体): 会员-->User,商品-->Product,订单-->Order 2 业务逻辑实现部分(System features list: 1, the member registration: input member name, member name should be the only 2, the member list: display all member 3, delete information: according to input the User name to delete, add 4 items: input name of commodity, price, descr iption and goods list: display all commodities information 6, delete: 7, placing orders according to brand name to delete a single commodity (to buy) : enter the User name, name of commodity, quantity for Order operation, Order list: display all orders (including the information such as User name, trade name, Order number) system design phase: 1 first find the noun: (Domain Model) (entity) : member - > User, commodity - > Product, Order - > Order 2 business logic implementation)