摘要:
mybatis 必须加上resultType<select id="selectStoreListByCustno" parameterType="java.util.List" resultType="java.util.List"> </select> 阅读全文
摘要:
转载:https://www.cnblogs.com/liangss/p/5120732.html 阅读全文
摘要:
Map<Object, Long> a1Map = groupStoreVisiList.stream().filter(map->map.getA1() != null)//这里需要加个判断,该字段不能为null .collect(Collectors.groupingBy(p -> p.getA 阅读全文