【校园商铺SSM-15】店铺列表展示--Service+Controller层的实现

1. Service层的实现

1. ShopService接口

    /**
     * 根据shopCondition分页返回相应列表数据
     * @param shopCondition
     * @param pageIndex
     * @param pageSize
     * @return
     */
    public ShopExecution getShopList(
            Shop shopCondition,int pageIndex,int pageSize);

2. ShopServiceImpl实现类

封装util用于获取rowIndex：

public class PageCaculator {
    /**
     * 从第(pageIndex-1)*pageSize个数据开始选取pageSize个数据
     * @param pageIndex 页码
     * @param pageSize 选取的数据
     * @return
     */
    public static int calculateRowIndex(int pageIndex,int pageSize){
        return (pageIndex>0)?(pageIndex-1)*pageSize:0;
    }
}

    @Override
    public ShopExecution getShopList(Shop shopCondition, int pageIndex, int pageSize) {
        int rowIndex =
                PageCaculator.calculateRowIndex(pageIndex,pageSize);
        List<Shop> shopList =
                shopDao.queryShopList(shopCondition,rowIndex,pageSize);
        int count = shopDao.queryShopCount(shopCondition);
        ShopExecution se = new ShopExecution();
        if(shopList!=null){
            se.setShopList(shopList);
            se.setCount(count);
        }else {
            se.setState(ShopStateEnum.INNER_ERROR.getState());
        }
        return se;
    }

3. ShopServiceTest测试类

    @Test
    public void testGetShopList(){
        Shop shopCondition = new Shop();
        ShopCategory sc = new ShopCategory();
        sc.setShopCategoryId(3L);
        shopCondition.setShopCategory(sc);
        ShopExecution shopExecution
                = shopService.getShopList(shopCondition,1,2);
        System.out.println("店铺列表数为："+shopExecution.getShopList().size());
        System.out.println("店铺列表总数为："+shopExecution.getCount());
    }

2. Controller层的实现

    /**
     *
     *
     * @Title: getShopList
     *
     * @Description: 从session中获取当前person拥有的商铺列表
     *
     * @param request
     * @return
     *
     * @return: Map<String,Object>
     */
    @RequestMapping(value = "/getshoplist", method = RequestMethod.GET)
    @ResponseBody
    public Map<String, Object> getShopList(HttpServletRequest request) {
        Map<String, Object> modelMap = new HashMap<String, Object>();
        // 现在还没有做登录模块，因此session中并没有用户的信息，先模拟一下登录 要改造TODO
        PersonInfo personInfo = new PersonInfo();
        personInfo.setUserId(2L);
        personInfo.setName("茶花女");
        request.getSession().setAttribute("user", personInfo);
        // 从session中获取user信息
        personInfo = (PersonInfo) request.getSession().getAttribute("user");

        try {
            Shop shopCondition = new Shop();
            shopCondition.setOwner(personInfo);
            ShopExecution se = shopService.getShopList(shopCondition, 1, 99);
            modelMap.put("success", true);
            modelMap.put("shopList", se.getShopList());
            modelMap.put("user", personInfo);
        } catch (ShopOperationException e) {
            e.printStackTrace();
            modelMap.put("success", false);
            modelMap.put("errMsg", e.getMessage());
        }
        return modelMap;
    }

    /**
     *
     *
     * @Title: shopManagement
     *
     * @Description: 从商铺列表页面中，点击“进入”按钮进入
     *               某个商铺的管理页面的时候，对session中的数据的校验从而进行页面的跳转，是否跳转到店铺列表页面或者可以直接操作该页面
     *
     *               访问形式如下
     *               http://ip:port/o2o/shopadmin/shopmanagement?shopId=xxx
     *
     * @return
     *
     * @return: Map<String,Object>
     */
    @RequestMapping(value = "/getshopmanageInfo", method = RequestMethod.GET)
    @ResponseBody
    public Map<String, Object> getShopManageInfo(HttpServletRequest request) {
        Map<String, Object> modelMap = new HashMap<String, Object>();
        // 获取shopId
        long shopId = HttpServletRequestUtil.getLong(request, "shopId");
        // 如果shopId不合法
        if (shopId < 0) {
            // 尝试从当前session中获取
            Shop currentShop = (Shop) request.getSession().getAttribute("currentShop");
            if (currentShop == null) {
                // 如果当前session中也没有shop信息,告诉view层 重定向
                modelMap.put("redirect", true);
                modelMap.put("url", "/o2o/shopadmin/shoplist");
            }else{
                // 告诉view层 进入该页面
                modelMap.put("redirect", false);
                modelMap.put("shopId", currentShop.getShopId());
            }
        } else { // shopId合法的话
            Shop shop = new Shop();
            shop.setShopId(shopId);
            // 将currentShop放到session中
            request.getSession().setAttribute("currentShop", shop);
            modelMap.put("redirect", false);
        }

        return modelMap;
    }