4dkankan-center-manage/src/main/resources/mapper/manage/SysRoleMenuMapper.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.fdkankan.manage.mapper.ISysRoleMenuMapper">

    <select id="getButtonIdsByRoleId" resultType="java.lang.Long">
        select m.id from sys_menu m left join sys_role_menu r on m.id = r.menu_id
        where m.type = 2 and role_id = #{roleId}
    </select>
</mapper>