ihotel-backend/src/main/resources/mapper/ihotel/RoomDao.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.RoomDao">

	<!-- 可根据自己的需求，是否要使用 -->
    <resultMap type="com.chuanghai.ihotel.entity.RoomEntity" id="roomMap">
        <result property="id" column="id"/>
        <result property="roomNo" column="room_no"/>
        <result property="build" column="build"/>
        <result property="floor" column="floor"/>
        <result property="roomTypeId" column="room_type_id"/>
        <result property="roomTypeName" column="room_type_name"/>
        <result property="enableUse" column="enable_use"/>
    </resultMap>

    <resultMap id="groupResult" type="com.chuanghai.ihotel.vo.RoomGroupVO">
        <result property="build" column="build"/>
        <collection property="floors" ofType="com.chuanghai.ihotel.vo.RoomGroupVO$FloorVO">
            <result property="floor" column="floor"/>
            <collection property="room" ofType="com.chuanghai.ihotel.entity.RoomEntity">
                <result property="id" column="id"/>
                <result property="roomNo" column="room_no"/>
                <result property="build" column="build"/>
                <result property="floor" column="floor"/>
                <result property="roomTypeId" column="room_type_id"/>
                <result property="roomTypeName" column="room_type_name"/>
                <result property="enableUse" column="enable_use"/>
            </collection>
        </collection>
    </resultMap>

    <select id="queryPageGroup" resultType="com.chuanghai.ihotel.vo.RoomGroupVO" resultMap="groupResult">
        select id, room_no, build, floor, room_type_id, room_type_name, enable_use
        from room
        <where>
            <if test="request.roomNo != null and request.roomNo != ''">
                and room_no = #{request.roomNo}
            </if>
            <if test="request.build != null and request.build != ''">
                and build = #{request.build}
            </if>
            <if test="request.floor != null and request.floor != ''">
                and floor = #{request.floor}
            </if>
            <if test="request.roomTypeId != null">
                and room_type_id = #{request.roomTypeId}
            </if>
        </where>
        group by build,id
        order by build asc,floor asc
    </select>


</mapper>