ihotel-backend/target/classes/mapper/ihotel/RoomThirdSettingDao.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.chuanghai.ihotel.dao.RoomThirdSettingDao">

	<!-- 可根据自己的需求，是否要使用 -->
    <resultMap type="com.chuanghai.ihotel.entity.RoomThirdSettingEntity" id="roomThirdSettingMap">
        <result property="id" column="id"/>
        <result property="roomId" column="room_id"/>
        <result property="electricId" column="electric_id"/>
        <result property="waterId" column="water_id"/>
        <result property="lockId" column="lock_id"/>
        <result property="lockMac" column="lock_mac"/>
    </resultMap>

    <select id="getByRoomid" resultType="com.chuanghai.ihotel.entity.RoomThirdSettingEntity" resultMap="roomThirdSettingMap">
        select * from room_third_setting
        <where>
            <if test="roomid != null and roomid != ''">
                and room_third_setting.room_id = #{roomid}
            </if>
        </where>
        limit 1
    </select>
</mapper>