删除购物车列表页面商品

一、实现思路

　　1、从前台页面传进来itemId。

　　2、从cookie中取所有商品的列表。

　　3、删除itemId对应的商品。

　　4、将商品列表再传回cookie中，并响应给浏览器。

二、jsp页面删除代码

　　1、请求url : /cart/delete/${cart.id}.html

<div class="cell p-remove"><a id="remove-11345721-1" data-more="removed-87.20-1" clstag="clickcart|keycount|xincart|btndel318558" class="cart-remove" href="/cart/delete/${cart.id}.html">删除</a>

三、service层代码

@Service
public class CartServiceImpl implements CartService {

    @Autowired
    private ItemService itemService;
    @Value("${COOKIE_EXPIRE}")
    private Integer COOKIE_EXPIRE;

   ......

    @Override
    public TaotaoResult deleteCartItem(Long itemId, HttpServletRequest request, HttpServletResponse response) {
        List<CartItem> lists = getCartLists(request);
        for (CartItem c : lists) {
            if(c.getId().longValue() == itemId) {
                lists.remove(c);
                break;
            }
        }
        CookieUtils.setCookie(request, response,"TT_CART",JsonUtils.objectToJson(lists), COOKIE_EXPIRE, true);
        return TaotaoResult.ok();
    }
}

四、controller层代码，重定向到cart.jsp页面。

@Controller
public class CartController {

    @Autowired
    private CartService cartService;

　　.......

    @RequestMapping("/cart/cart")
    public String showCart(HttpServletRequest request, Model model) {
        List<CartItem> cartLists = cartService.getCartLists(request);
        model.addAttribute("cartList", cartLists);
        return "cart";
    }

    .......

    @RequestMapping("/cart/delete/{itemId}")
    public String deleteCartItem(@PathVariable Long itemId,HttpServletRequest request,HttpServletResponse response) {
        cartService.deleteCartItem(itemId, request, response);
        return "redirect:/cart/cart.html";
    }
}