gold-java/src/main/resources/mapper/MenuMapper.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.example.demo.mapper.MenuMapper">

    <select id="selectMenusByRoleId" resultType="com.example.demo.domain.vo.MenuVo">
        SELECT DISTINCT
            m.id,
            m.menu_name,
            m.parent_id,
            m.menu_type,
            m.priority
        FROM
            role r
                LEFT JOIN role_menu rm ON r.id = rm.role_id
                LEFT JOIN menu m ON rm.menu_id = m.id
        WHERE
            r.id = #{roleId}
          AND m.id IS NOT NULL
        ORDER BY
            m.parent_id,m.priority
    </select>

    <insert id="addPermission">
        INSERT INTO role_menu (role_id, menu_id)
        VALUES
        <foreach collection="list" item="item" separator=",">
            (#{item.roleId}, #{item.menuId})
        </foreach>
    </insert>

    <select id="selectByMenuId" resultType="com.example.demo.domain.entity.Menu">
        SELECT menu_name FROM menu
        <where>
            id = #{id}
        </where>
    </select>

</mapper>