ldlly0505的博客

记录下动态sql的常用标签： 1.where 一般用作数据操作添加的条件 例子： <select id="selectByRoleId" resultMap="resource"> select * from resource <where> role_id = #{roleId} &lt...

<select id="findCountByContditon" resultMap="user" parameterType="com.example.demo.po.User"> select count(id) from user <where> <if test="na...

1.找出今天以前的user数据 mapper文件： @Mapper public interface UserMapper { public List<User> findByDate(Date createTime); } 隐射文件： <select id="findByDate" resultMap="user"> selec...

1.什么是mybatis？ 官网是这样介绍的：附地址：https://mybatis.org/mybatis-3/ What is MyBatis? MyBatis is a first class persistence framework with support for custom SQL, stored procedures and advanced mappings....