JAVA lambda 分组随笔琐记

Map<String, List<GoodsStockModel>> groupMap = goodsStockModelNew.getSkus_list().stream().
        collect(Collectors.groupingBy(GoodsStockModel::getSkuid));

for (Map.Entry<String, List<GoodsStockModel>> map : groupMap.entrySet()) {
    if (map.getValue().size() > 1) {
        //处理业务
        GoodsStockModelResponse response=new GoodsStockModelResponse();
        System.out.println(map.getKey());
        response.setSkuid(map.getKey());
        response.setWarehouse_id("");
        //response.setWarehouse_id(menu.getWarehouse_id());
        response.setFail_info("商品编码不能重复,请检查参数中sku_id");
        responseList.add(response);

        System.out.println("------>" + map.getKey());
    }
}