Computer Hardware Quotation System （Java Language Description）
Requirements are divided into administrator and ordinary users.
Ordinary users have the functions of registration, login, etc.,
with basic computer hardware, select computer hardware,
as well as placing orders,
modifying orders, refunding orders, etc.;
administrators have the functions of releasing information on computer hardware,
managing user orders and delivering orders, etc.
要求分为管理员和普通用户端。普通用户具有注册，登录等功能，
具备基本的电脑硬件，选择电脑硬件，以及下达订单，修改订单，退单等功能；
管理员具有发布电脑硬件信息，管理用户订单以及配送订单等功能。