CinemaDemo/src/main/java/com/example/cinema/data/ActivityMapper.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.cinema.data.ActivityMapper">
    <insert id="insertActivity" parameterType="com.example.cinema.po.Activity"
            useGeneratedKeys="true" keyProperty="id">
        insert into activity(a_description,activity_name,coupon_id,start_time,end_time)
        values(#{description},#{name},#{couponId},#{startTime},#{endTime})
    </insert>
    <insert id="insertActivityAndMovie">
        insert into activity_movie(activity_id,movie_id) values
        <foreach collection="movieId" item="item" index="index"
                 separator=",">
            (#{activityId},#{item})
        </foreach>
    </insert>
    <select id="selectById" resultMap="Activity">
        select
            *
        from
            activity a
        left join
            activity_movie am
        on
            a.id=am.activity_id
        left join
            movie m
        on
            am.movie_id=m.id
        WHERE a.id=#{id}
    </select>

    <select id="selectActivities" resultMap="Activity">
        select
            *
        from
            activity a
        left join
            activity_movie am
        on
            a.id=am.activity_id
        left join
            movie m
        on
            am.movie_id=m.id

    </select>

    <select id="selectActivitiesByMovie" resultMap="Activity">
        select
        *
        from
        activity a
        left join
        activity_movie am
        on
        a.id=am.activity_id
        left join
        movie m
        on
        am.movie_id=m.id

        where a.start_time &lt; Now() and a.end_time &gt; Now() and am.movie_id=#{movieId}

    </select>
    <select id="selectActivitiesWithoutMovie" resultMap="Activity">
        select
        *
        from
        activity a
        left join
        activity_movie am
        on
        a.id=am.activity_id
        where a.start_time &lt; Now() and a.end_time &gt; Now() and movie_id is null

    </select>



    <resultMap id="Activity" type="com.example.cinema.vo.ActivityVO">
        <result column="a_description" property="description"></result>
        <result column="id" property="id"></result>
        <result column="activity_name" property="name"></result>
        <result column="start_time" property="startTime"></result>
        <result column="end_time" property="endTime"></result>
        <association property="coupon" column="coupon_id" select="com.example.cinema.data.CouponMapper.selectById">
        </association>
        <collection property="movieList" ofType="com.example.cinema.vo.MovieVO">
            <id column="movie_id" property="id"></id>
            <result column="poster_url" property="posterUrl"></result>
            <result column="screen_writer" property="screenWriter"></result>
            <result column="start_date" property="startDate"></result>
            <result column="end_date" property="endDate"></result>
            <result column="name" property="name"></result>
            <result column="director" property="director"></result>
            <result column="type" property="type"></result>
            <result column="country" property="country"></result>
            <result column="language" property="language"></result>
            <result column="length" property="length"></result>
            <result column="description" property="description"></result>
            <result column="status" property="status"></result>
            <result column="starring" property="starring"></result>
        </collection>
    </resultMap>

</mapper>