本项目模拟并实现当前正在运营的“当当网”的大部分功能。提供用户注册、商品浏览、商品购买、商品分类、购物车、购物车管理等功能。-The simulation of the project and to achieve " Dangdang" most of the functions currently being operated. Users registered commodity browser to buy commodities, commodity classifi