Springframework Restful Controller - JSON Response

Spring  JSON Controller  의 전형적인 예제 입니다. @ResponseBody Map  을 이용하여 리턴 해주는 방법이 인상적입니다.

(굳이 도메인 클래스를 리턴하지 않고 이런 방식을 처리하는게 생산성이나 유지보수 성능이 좋습니다)

출처는 : ...

@RequestMapping(value = "/add", produces = "application/json")
    public @ResponseBody Map addJson(HttpServletRequest request, HttpServletResponse response, Model model,
            @ModelAttribute("addToCartItem") AddToCartItem addToCartItem) throws IOException, PricingException, AddToCartException {
        Map responseMap = new HashMap();
        try {
            super.add(request, response, model, addToCartItem);
            
            if (addToCartItem.getItemAttributes() == null || addToCartItem.getItemAttributes().size() == 0) {
                responseMap.put("productId", addToCartItem.getProductId());
            }
            responseMap.put("productName", catalogService.findProductById(addToCartItem.getProductId()).getName());
            responseMap.put("quantityAdded", addToCartItem.getQuantity());
            responseMap.put("cartItemCount", String.valueOf(CartState.getCart().getItemCount()));
            if (addToCartItem.getItemAttributes() == null || addToCartItem.getItemAttributes().size() == 0) {
                // We don't want to return a productId to hide actions for when it is a product that has multiple
                // product options. The user may want the product in another version of the options as well.
                responseMap.put("productId", addToCartItem.getProductId());
            }
        } catch (AddToCartException e) {
            if (e.getCause() instanceof RequiredAttributeNotProvidedException) {
                responseMap.put("error", "allOptionsRequired");
            } else {
                throw e;
            }
        }
        
        return responseMap;
    }

아래는 기타...

@RequestMapping(value = "/add", produces = { "text/html", "*/*" })
    public String add(HttpServletRequest request, HttpServletResponse response, Model model,
            @ModelAttribute("addToCartItem") AddToCartItem addToCartItem) throws IOException, PricingException, AddToCartException {
        try {
            return super.add(request, response, model, addToCartItem);
        } catch (AddToCartException e) {
            Product product = catalogService.findProductById(addToCartItem.getProductId());
            return "redirect:" + product.getUrl();
        }
    }
    
    @RequestMapping("/updateQuantity")
    public String updateQuantity(HttpServletRequest request, HttpServletResponse response, Model model,
            @ModelAttribute("addToCartItem") AddToCartItem addToCartItem) throws IOException, PricingException, UpdateCartException, RemoveFromCartException {
        return super.updateQuantity(request, response, model, addToCartItem);
    }
    
    @RequestMapping("/remove")
    public String remove(HttpServletRequest request, HttpServletResponse response, Model model,
            @ModelAttribute("addToCartItem") AddToCartItem addToCartItem) throws IOException, PricingException, RemoveFromCartException {
        return super.remove(request, response, model, addToCartItem);
    }
    
    @RequestMapping("/empty")
    public String empty(HttpServletRequest request, HttpServletResponse response, Model model) throws PricingException {
        //return super.empty(request, response, model);
        return "ajaxredirect:/";
        
    }
    
    @RequestMapping("/promo")
    public String addPromo(HttpServletRequest request, HttpServletResponse response, Model model,
            @RequestParam("promoCode") String customerOffer) throws IOException, PricingException {
        return super.addPromo(request, response, model, customerOffer);
    }
    
    @RequestMapping("/promo/remove")
    public String removePromo(HttpServletRequest request, HttpServletResponse response, Model model,
            @RequestParam("offerCodeId") Long offerCodeId) throws IOException, PricingException {
        return super.removePromo(request, response, model, offerCodeId);
    }