文件上传action

@RequestMapping(value = "/update.action", method = RequestMethod.POST)
	public @ResponseBody Result<AppJobProduct> update(HttpServletRequest request,@RequestParam(value = "upload", required = false) MultipartFile file,@ModelAttribute AppJobProduct appJobProduct) {
		if(file!=null){
		String filename=new Date().getTime()+"."+StringUtils.substringAfterLast(file.getOriginalFilename(), ".");
		String path=request.getSession().getServletContext().getRealPath("product_image");
		File tFile=new File(path,filename);
		appJobProduct.setProductImageLink(/*request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+*/request.getContextPath()+"/product_image/"+filename);
		if(!tFile.exists()){
			tFile.mkdir();
		}
		try {
			file.transferTo(tFile);
		} catch (IllegalStateException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		}
		return this.appJobProductService.update(appJobProduct);
	}