// 从购物车中删除商品
private boolean deleteFromCart(HttpServletRequest request, HttpServletResponse response) {
String id = request.getParameter("id");
Cart cart = (Cart) request.getSession().getAttribute("cart");
Items item = idao.getItemsById(Integer.parseInt(id));
if (cart.removeGoodsFromCart(item)) {
return true;
} else {
return false;
}
}
// 添加商品进购物车的方法
private boolean addToCart(HttpServletRequest request, HttpServletResponse response) {
String id = request.getParameter("id");
String number = request.getParameter("num");
Items item = idao.getItemsById(Integer.parseInt(id));
// 是否是第一次给购物车添加商品,需要给session中创建一个新的购物车对象
if (request.getSession().getAttribute("cart") == null) {
Cart cart = new Cart();
request.getSession().setAttribute("cart", cart);
}
Cart cart = (Cart) request.getSession().getAttribute("cart");
if (cart.addGoodsInCart(item, Integer.parseInt(number))) {
return true;
} else {
return false;
}
}