@Autowired
private SessionFactory sessionFactory;

@Override
public Boolean save(ProductInfo productInfo) {
    Boolean flag = null;
    if(productInfo!=null) {
    Long id = productInfo.getid();
    Product product = null;
    boolean isNew = false;
    if (id != null) {
        product = this.get(id);
    }
    if (product == null) {
        isNew = true;
        product = new Product();
    }
    product.setName(productInfo.getName());
    product.setPrice(productInfo.getPrice());
    product.setBrand(productInfo.getBrand());
    product.setCategory(productInfo.getCategory());

    if (productInfo.getFileData() != null) {
        byte[] image = productInfo.getFileData().getBytes();
        if (image != null && image.length > 0) {
            product.setImage(image);
        }
    }
    if (isNew) {
        this.sessionFactory.getCurrentSession().persist(product);
    }

    this.sessionFactory.getCurrentSession().flush();
    return Boolean.TRUE;
    }else {
        return Boolean.FALSE;
    }
}

@Autowired
private ProductDao productDao;


public Boolean save(ProductInfo productInfo) {
    return productDao.save(productInfo);
}

@Autowired
private ProductDao productDAO;

@Autowired
private ProductService productservice;

@Autowired
private ProductInfoValidator productInfoValidator;

@InitBinder
public void myInitBinder(WebDataBinder dataBinder) {
    Object target = dataBinder.getTarget();
    if (target == null) {
        return;
    }
    System.out.println("Target=" + target);

    if (target.getClass() == ProductInfo.class) {
        dataBinder.setValidator(productInfoValidator);

        dataBinder.registerCustomEditor(byte[].class, new ByteArrayMultipartFileEditor());
    }
}


@RequestMapping(value = { "/createproduct" }, method = RequestMethod.GET)
public String product(Model model, @RequestParam(value = "id", defaultValue = "") Long id) {

    ProductInfo productInfo = null;

    if (id != null ) {
        productInfo = this.productservice.findProductInfo(id);
    }
    if (productInfo == null) {
        productInfo = new ProductInfo();
        productInfo.setNewProduct(true);
    }
    model.addAttribute("productForm", productInfo);
    return "createproduct";
}


@RequestMapping(value = { "/createproduct" }, method = RequestMethod.POST)
@Transactional
public String productSave(Model model,
        @ModelAttribute("productForm") @Validated ProductInfo productInfo,
        BindingResult result,
        final RedirectAttributes redirectAttributes) {

    if (result.hasErrors()) {
        return "createproduct";
    }
    try {
        this.productservice.save(productInfo);
    } catch (Exception e) {

        String message = e.getMessage();
        model.addAttribute("message", message);

        return "createproduct";

    }
    return "redirect:/productList";
}