Profile Picture Upload

@PostMapping("/{id}/profile-picture/upload")
    @PreAuthorize("isAuthenticated()")
    public String uploadPicture(@PathVariable Integer id, FileBindingModel fileBindingModel) {
        if (!this.userRepository.exists(id)) {
            return "redirect:/profile";
        }

        UserDetails principal = (UserDetails) SecurityContextHolder.getContext()
                .getAuthentication().getPrincipal();

        User loggedUser = this.userRepository.findByEmail(principal.getUsername());

        User user = this.userRepository.findOne(id);

        if (!loggedUser.equals(user)) {
            return "redirect:/login";
        }

        MultipartFile file = fileBindingModel.getPicture();

        if (file != null) {

            String originalFileName = file.getOriginalFilename();

            File imageFile = new File
                    ("D:\\javaBroadcast\\newsWebsiteProject\\blog\\src\\main\\resources\\static\\images\\", originalFileName);

            try {
                file.transferTo(imageFile);
                user.setImagePath(imageFile.getPath());

                this.userRepository.saveAndFlush(user);

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