java8 stream按对象多个属性对集合进行分组,并进行组装数据

List<JsonObject> list = goodsList.getList();
        Map<String, List<JsonObject>> menuGroupMap = list.stream().collect(Collectors.groupingBy(goods -> goods.getInteger("menu_id")+"_"+goods.getString("menu_name")));
        List<JsonObject> countRecords = menuGroupMap.keySet().stream().map(key -> {
          String[] temp = key.split("_");
          String menu_id = temp[0];
          String menu_name = temp[1];
          JsonObject goodObject = new JsonObject();
          goodObject.put("menu_id",menu_id);
          goodObject.put("menu_name",menu_name);
          goodObject.put("goodList",menuGroupMap.get(key));
          goodObject.put("goodNum",menuGroupMap.get(key));
          return goodObject;
        }).collect(Collectors.toList());