shop--7.店鋪編輯和列表--店鋪列表 分頁查詢，模糊查詢--service層,controller層實現

shop--7.店鋪編輯和列表--店鋪列表 分頁查詢，模糊查詢--dao層實現

在service層中， 有一個問題，就是：

dao層中的分頁查詢傳參，傳入的是rowIndex（從第幾行開始查詢）, pageSize（查詢多少條記錄）

而在service層中分頁查詢傳的是pageIndex（第幾頁），pageSize

所以在第一個參數要有一個轉換才可以

所以編寫一個工具類，將pageIndex轉為rowIndex

public class PageCalculator {
    /**
     * 將pageIndex（第幾頁）轉換為查詢結果中的第幾行rowIndex
     * @param pageIndex
     * @param pageSize
     * @return
     */
    public static int calculateRowIndex(int pageIndex, int pageSize){
        return (pageIndex > 0) ? (pageIndex - 1) * pageSize : 0;
    }
}

　　

service接口

/**
     * 實現分頁查詢店鋪，通過條件組合，來篩選出條件范圍內的店鋪列表
     * @param shopCondition
     * @param pageIndex  第幾頁
     * @param pageSize   一頁中數據的數量
     * @return ShopExecution 其中包含shopList和count
     */
    public ShopExecution getShopList(Shop shopCondition, int pageIndex, int pageSize);

　　

serviceImpl

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

　　

 controller層實現

/**
     * 實現分頁查詢店鋪，通過條件組合，來篩選出條件范圍內的店鋪列表
     * @param request
     * @return
     */
    @RequestMapping(value="/getshoplist", method=RequestMethod.GET)
    @ResponseBody
    public Map<String, Object> getShopList(HttpServletRequest request){
        Map<String, Object> modelMap = new HashMap<>();
        PersonInfo user = new PersonInfo();
        user.setUserId( 1L );
        ShopExecution shopExecution = null;
        try{
            Shop shopCondition = new Shop();
            shopCondition.setOwner( user );
            shopCondition.setShopName("f");
            Area area = new Area();
            area.setAreaId( 2 );
            shopCondition.setArea(area);
            shopExecution = shopService.getShopList( shopCondition, 1, 100 );
            modelMap.put( "shopList", shopExecution.getShopList() );
            modelMap.put( "user", user);
            modelMap.put( "success", true );
        } catch(Exception e){
            modelMap.put( "success", false );
            modelMap.put( "errMsg", e.toString() );
        }
        return modelMap;
    }

　　

 

這個不知道是做什么的

/**
     *管理session相關的
     * @param request
     * @return
     */
    @RequestMapping(value="/getshopmanagementinfo", method=RequestMethod.GET)
    @ResponseBody
    public Map<String, Object> getShopManagementInfo(HttpServletRequest request){
        Map<String, Object> modelMap = new HashMap<>();
        long shopId = (long) request.getSession().getAttribute("shopId");
        //如果shopId不存在
        if(shopId <= 0){
            //判斷當前有沒有登錄
            Object currentShopObj = request.getSession().getAttribute("currentShop");
            //如果當前既沒有shopId傳入，也沒有店鋪登錄的話，就重定向到店鋪列表頁面
            if(currentShopObj == null){
                modelMap.put( "redirect", true );
                modelMap.put( "url", "/shop/shoplist" );
            }else{
                //如果當前有店鋪登錄的話
                Shop currentShop = (Shop)currentShopObj;
                modelMap.put( "redirect", false );
                modelMap.put( "shopId", currentShop.getShopId());
            }
        }else{
            //如果當前有shopId
            Shop currentShop = new Shop();
            currentShop.setShopId(shopId);
            request.getSession().setAttribute("currentShop", currentShop);
            modelMap.put( "redirect", false );
        }
        return modelMap;
    }