toby-yezhu/yezhu-api/src/main/resources/mapper/room/UnitDao.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.kioor.room.dao.UnitDao">

    <select id="getList" resultType="com.kioor.room.entity.UnitEntity">
        select * from tb_unit where 1=1
        <if test="buildingId != null">
            and building_id = #{buildingId}
        </if>
    </select>

</mapper>