@PostMapping("/upload")
	    public String singleFileUpload(@RequestParam("file") MultipartFile file,
	                                   RedirectAttributes redirectAttributes) {

	        if (file.isEmpty()) {
	        	LOGGER.info("File is empty");
	            redirectAttributes.addFlashAttribute("message", "Please select a file to upload");
	            return "redirect:uploadStatus";
	        }

	        try {

	           // do some magic

	            redirectAttributes.addFlashAttribute("message",
	                    "data updated successfully...");

	        } catch (IOException e) {
	            e.printStackTrace();
	        }

	        return "redirect:uploadStatus";
	    }