shop--7.店铺编辑和列表--更新店铺的信息，包括对店铺照片的处理，根据shopId获取shop信息

/**
     * 根据shopId获取shop信息
     * @param shopId
     * @return
     */
    public Shop getShopByShopId(long shopId);


    /**
     * 更新店铺的信息，包括对店铺照片的处理
     * @param shop
     * @param shopImg
     * @return
     */
    public ShopExecution modifyShop(Shop shop, CommonsMultipartFile shopImg);

　

serviceImpl实现

　

    @Override
    public Shop getShopByShopId(long shopId) {
        return shopDao.queryByShopId( shopId );
    }

    @Override
    public ShopExecution modifyShop(Shop shop, CommonsMultipartFile shopImg) {
        if(shop == null || shop.getShopId() == null){
            return new ShopExecution(ShopStateEnum.NULL_SHOP);
        } else{
            try{
                //1.判断是否需要修改图片
                if(shopImg != null){

                    Shop tempShop = shopDao.queryByShopId( shop.getShopId() );
                    //判断之前的店铺信息中是否有shop图片，如果有的话，就先删除，没有的话，就直接加进去
                    if(tempShop != null){
                        ImageUtil.deleteFileOrPath( tempShop.getShopImg() );
                    }
                    addShopImg( shop, shopImg );
                }
                //2.更新店铺信息

                shop.setLastEditTime( new Date(  ) );
                int effectNum = shopDao.updateShop( shop );
                if(effectNum <= 0){
                    return new ShopExecution(ShopStateEnum.INNER_ERROR);
                } else{
                    shop = shopDao.queryByShopId( shop.getShopId() );
                    return new ShopExecution( ShopStateEnum.SUCCESS, shop );
                }
            } catch (Exception e){
                throw new ShopOperationException("modifyshop error " + e.getMessage());
            }
        }
    }

　　

工具类ImageUtil中新增的delete

/**
     *storePath是文件路径  或  目录路径
     * 如果storePath是文件路径，则删除文件
     * 如果storePath是目录路径，则删除该目录下的所有文件
     * @param storePath
     */
    public static void deleteFileOrPath(String storePath){
       File fileOrPath = new File(PathUtil.getImgBasePath() + storePath);
       if(fileOrPath.exists()){
           if(fileOrPath.isDirectory()){
               File files[] = fileOrPath.listFiles();
               for(File file : files){
                   file.delete();
               }
           }
           fileOrPath.delete();
       }
    }

　　

controller层的实现

其中，修改店铺信息的代码与注册店铺信息的代码相似

 /**
     * 根据店铺信息获取店铺
     * @param request
     * @return
     */
    @RequestMapping(value="/getshopbyid", method=RequestMethod.GET)
    @ResponseBody
    private Map<String, Object> getShopById(HttpServletRequest request){
        Map<String, Object> modelMap = new HashMap<>();
        Long shopId = HttpServletRequestUtil.getLong( request, "shopId" );
        if(shopId > -1){
            try{
                Shop shop = shopService.getShopByShopId( shopId );
                List<Area> areaList = areaService.getAreaList();
                modelMap.put("shop", shop);
                modelMap.put( "areaList", areaList );
                modelMap.put( "success", true );
            } catch(Exception e){
                modelMap.put("success", false);
                modelMap.put("errMsg", e.toString());
            }

        }else{
            modelMap.put("success", false);
            modelMap.put( "errMsg", "empty shopId" );
        }
        return modelMap;
    }


    /**
     * 修改店铺信息
     * @param request
     * @return
     */
    
    @RequestMapping(value="/modifyshop", method= RequestMethod.POST )
    @ResponseBody
    public Map<String, Object> modifyShop(HttpServletRequest request){
        Map<String, Object> modelMap = new HashMap<>();
        //判断验证码是否正确
        if(!CodeUtil.checkVerifyCode(request)){
            modelMap.put( "success", false );
            modelMap.put( "errMsg", "验证码错误!!!!!" );
            return modelMap;
        }
        //1.接收并转化相应的参数，包括店铺信息和图片信息
        String shopStr = HttpServletRequestUtil.getString( request, "shopStr" );
        ObjectMapper mapper = new ObjectMapper(); // create once, reuse
        Shop shop = null;
        try {
            shop = mapper.readValue(shopStr, Shop.class);
        } catch (IOException e) {
            modelMap.put("success", false);
            modelMap.put("errMsg", e.getMessage());
            return modelMap;
        }
        CommonsMultipartFile shopImg = null;
        //在本次会话的上下文获取上传的文件
        CommonsMultipartResolver commonsMultipartResolver =
                new CommonsMultipartResolver(request.getSession().getServletContext());
        //如果文件上传的有值
        if(commonsMultipartResolver.isMultipart( request )){
            MultipartHttpServletRequest multipartHttpServletRequest = (MultipartHttpServletRequest)request;
            shopImg = (CommonsMultipartFile)multipartHttpServletRequest.getFile("shopImg");
        }
        //2.注册店铺
        if(shop != null && shop.getShopId() != null){
            try{
                ShopExecution shopExecution = shopService.modifyShop(shop, shopImg);
                if(shopExecution.getState() == ShopStateEnum.SUCCESS.getState()){
                    modelMap.put( "success", true );

                }else{
                    modelMap.put( "success", false );
                    modelMap.put( "errMsg",  shopExecution.getStateInfo());
                }
            } catch(RuntimeException e){
                modelMap.put("success", false);
                modelMap.put("errMsg", e.toString());
            }
        }else{
            modelMap.put("success", false);
            modelMap.put("errMsg", "请输入店铺Id");
        }

        //3.返回结果
        return modelMap;
    }