Upload Files with Spring MVC

Have you ever tried to upload a file as part of a form to be submited?
In my case I have a form to add or update products, and each product must have an image (JPG file), besides the regular information related to each product: Name, Description, etc.
Then, we need a form with some inputs and a method on one of my controllers to handle this request and we're set.

This topic is really simple to cover, despite of the fact is poorly covered by the official documentation.
Steps
Add entries on your POM <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>1.4</version> </dependency> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.2.1</version> </dependency>
Add a MultipartResolver in your Web Application Context <property name="maxUploadSize" value="50000"/><!-- in bytes --> <!-- There are more props, but I am not going to use them --> </bean>
On your form don't forget to include enctype attribute and make it POST

Add your input type file as regular HTML

In your controller add a method to handle with all params @RequestMapping(value="saveOrUpdateProduct.do", method=RequestMethod.POST) public String saveUpdateProduct(HttpServletRequest request, ModelMap modelMap, @ModelAttribute("ProductDTO") final ProductDTO productDTO, @RequestParam("productImage") final MultipartFile productImage, @RequestParam("brand") final Integer brand, @RequestParam("category") final Integer category){ if(!this.isLoggedIn(request)){//Verify if user is authenticated return "redirect:/authentication/notLoggedIn.do"; } Boolean result = false; File fileProductImage = new File(request.getSession().getServletContext().getRealPath("/img/products/")+File.separatorChar+productDTO.getCode()+".JPG"); //I'm going to upload all images into this directory and will assign them ext JPG log.debug("Save or Update products"); log.debug("fileProductImage="+fileProductImage); productDTO.getBrandDTO().setIdBrand(brand); productDTO.getCategoryDTO().setIdCategory(category); try { /*if(StringUtils.isEmpty(productDTO.getIdProduct()+"")){ result = this.catalogsService.addProduct(productDTO); }else{ result = this.catalogsService.modifyProduct(productDTO); } */ if(result){ log.debug("productDTO= "+productDTO+", idBrand= "+brand+", idCategory="+category); log.debug("FileUpload= "+productImage+", "+productImage.getContentType()+", "+productImage.getName()+", "+productImage.getOriginalFilename()+", "+productImage.getSize()); FileUtils.writeByteArrayToFile(fileProductImage, productImage.getBytes()); } } catch (Exception ex) { log.error(ex); modelMap.put(GenericConstants.KEY_ERROR, ex.getMessage()); } return getAllProducts(request, modelMap, null); }
I'm using FileUtils to save the uploaded file :D
Look carefully to this parameter @RequestParam("productImage") final org.springframework.web.multipart.MultipartFile productImage @RequestParam("productImage") matches to

And you're all set! Easy, Isn't it?