自用java购物

@RequestMapping("listgoodscart")
    public ResultEntity listGoodsCart(@RequestParam(name = "data", required = true) String data,
            @RequestParam(name = "userid", required = true) String userId) {
        GoodsCartDTO goodsCartDTO;
        try {
            goodsCartDTO = decodeByBase64(data, GoodsCartDTO.class);
        } catch (Exception e) {
            e.printStackTrace();
            return error(ResultCode.PARAM_DECODE_ERROR);
        }
        if(StringUtils.isBlank(goodsCartDTO.getArea())) {
            return error(ResultCode.PARAM_CHECK_ERROR);
        }
        List<GoodsCart> goodsCartList = this.iGoodsCartService
                .selectList(new EntityWrapper<GoodsCart>()
                        .eq("is_deleted", 0)
                        .eq("is_enable", 1)
                        .eq("user_id", userId)
                        .eq("is_balance", 0)
                        .groupBy("shop_id")
                        .setSqlSelect("shop_id as shopId"));
        Map<Integer, List<Map<String, Object>>> map = Maps.newHashMap();
        if (goodsCartList != null && !goodsCartList.isEmpty()) {
            for (GoodsCart goodsCart : goodsCartList) {
                Integer shopId = goodsCart.getShopId();
                List<Map<String, Object>> list = this.iGoodsCartService.listGoodCartInfo(shopId,
                        Integer.valueOf(userId),goodsCartDTO.getArea());
                if (list != null && !list.isEmpty()) {
                    for (Map<String, Object> data1 : list) {
                        List<Map<String, Object>> mapList = map.get(shopId);
                        if (mapList != null && !mapList.isEmpty()) {
                            mapList.add(data1);
                        } else {
                            mapList = Lists.newArrayList();
                            mapList.add(data1);
                            map.put(shopId, mapList);
                        }
                    }
                }
            }
        }
        List<GoodsCartVO> goodsCartVOList = Lists.newArrayList();
        if (!map.isEmpty()) {
            Set<Map.Entry<Integer, List<Map<String, Object>>>> set = map.entrySet();
            for (Map.Entry<Integer, List<Map<String, Object>>> entry : set) {
                GoodsCartVO goodsCartVO = new GoodsCartVO();
                ShopInfo shopInfo = this.iShopInfoService.selectOne(new EntityWrapper<ShopInfo>().eq("is_deleted", 0)
                        .eq("is_enable", 1).eq("id", entry.getKey()).eq("status", 1).eq("business_status", 1));
                goodsCartVO.setShopInfo(shopInfo);
                goodsCartVO.setGoodsBaseInfoList(entry.getValue());
                goodsCartVOList.add(goodsCartVO);
            }
        }
        return success(goodsCartVOList);

    }