iot-gateway/src/main/resources/mappers/noticeMappers/BulletinMapper.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.zsc.edu.gateway.modules.notice.repo.BulletinRepository">
    <resultMap id="BulletinMap" type="com.zsc.edu.gateway.modules.notice.vo.BulletinVo" autoMapping="true">
        <id column="id" jdbcType="BIGINT" property="id"/>
        <result column="title" jdbcType="VARCHAR" property="title"/>
        <result column="state" jdbcType="INTEGER" property="state"/>
        <result column="top" jdbcType="BOOLEAN" property="top"/>
        <result column="edit_time" jdbcType="TIMESTAMP" property="editTime"/>
        <result column="publish_time" jdbcType="TIMESTAMP" property="publishTime"/>
        <result column="close_time" jdbcType="TIMESTAMP" property="closeTime"/>
        <result column="content" jdbcType="VARCHAR" property="content"/>
        <result column="edit_user_id" jdbcType="BIGINT" property="editUserId"/>
        <result column="publish_user_id" jdbcType="BIGINT" property="publishUserId"/>
        <result column="close_user_id" jdbcType="BIGINT" property="closeUserId"/>
        <result column="edit_user_name" jdbcType="VARCHAR" property="editUsername"/>
        <result column="publish_user_name" jdbcType="VARCHAR" property="publishUsername"/>
        <result column="close_user_name" jdbcType="VARCHAR" property="closeUsername"/>
        <result column="create_by" jdbcType="VARCHAR" property="createBy"/>
        <result column="update_by" jdbcType="VARCHAR" property="updateBy"/>
        <result column="create_time" jdbcType="DATE" property="createTime"/>
        <result column="update_time" jdbcType="DATE" property="updateTime"/>
        <result column="remark" jdbcType="VARCHAR" property="remark"/>
        <collection property="attachmentVos" ofType="com.zsc.edu.gateway.modules.attachment.vo.AttachmentVo"
                    autoMapping="true" columnPrefix="attachment_">
            <id column="id" property="attachmentId"/>
            <result column="file_name" jdbcType="VARCHAR" property="fileName"/>
            <result column="url" jdbcType="VARCHAR" property="url"/>
        </collection>
    </resultMap>
    <select id="selectByBulletinId" resultMap="BulletinMap">
        SELECT sb.*, a.id as attachment_id, a.file_name as attachment_file_name, a.url as attachment_url
        FROM sys_bulletin sb
                 LEFT JOIN
             sys_bulletin_attach sba ON sb.id = sba.bulletin_id
                 LEFT JOIN
             attachment a ON a.id = sba.attachment_id
        WHERE sb.id = #{bulletinId}

    </select>

    <select id="selectPageByConditions" resultType="com.zsc.edu.gateway.modules.notice.vo.BulletinVo">
        SELECT
        sb.id AS id,
        sb.state AS state,
        sb.content AS content,
        sb.title AS title,
        sb.top AS top,
        sb.remark AS remark,
        sb.close_time AS close_time,
        sb.close_user_id AS close_user_id,
        sb.create_by AS create_by,
        sb.create_time AS create_time,
        sb.edit_user_id AS edit_user_id,
        sb.publish_time AS publish_time,
        sb.publish_user_id AS publish_user_id,
        sb.update_by AS update_by,
        sb.update_time AS update_time,
        a.id AS id,
        a.file_name AS file_name,
        a.url AS url
        FROM
        sys_bulletin sb
        LEFT JOIN
        sys_bulletin_attach sba ON sb.id = sba.bulletin_id
        LEFT JOIN
        attachment a ON a.id = sba.attachment_id
        where 1=1
        <if test="query.title != null and query.title != ''">
            AND sb.title LIKE CONCAT('%', #{query.title}, '%')
        </if>
        <if test="query.state != null">
            AND sb.state = #{query.state}
        </if>
        <if test="query.publishTimeBegin != null and query.publishTimeEnd != null">
            AND sb.publish_time BETWEEN #{query.publishTimeBegin} AND #{query.publishTimeEnd}
        </if>
        order by sb.top DESC,sb.publish_time DESC,sb.create_time DESC
    </select>
</mapper>