在ShopManageController类里面

//修改店铺信息 ：我的代码
   if(shop!=null && shop.getShopId()!=null){
    ShopExecution se;
    try{
    if(shopImg==null){
     se=shopService.modifyShop(shop, null);
    }else{
     se=shopService.modifyShop(shop, ImageUtil.transferCommonsMultipartFileToFile(shopImg));
    }

老师的代码：

if (shop != null && shop.getShopId() != null) {
   ShopExecution se;
   try {
    if (shopImg == null) {
     se = shopService.modifyShop(shop, null);
    } else {
     ImageHolder imageHolder = new ImageHolder(shopImg.getOriginalFilename(), shopImg.getInputStream());
     se = shopService.modifyShop(shop, imageHolder);
    }

我觉得可以直接将CommonsMultipartFile转换成File，然后调用modifyShop()方法就好了，但是您是先转换成流，获取文件名字，最后调用方法，视频中为了这个问题还重构了一次代码，我有点不明白原因，请老师指点