ChickenFarm/SERVER/ChickenFarmV3/vb-modules/vb-system/src/main/resources/mapper/system/SysNoticeMapper.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="cn.vber.system.mapper.SysNoticeMapper">

    <resultMap type="cn.vber.system.domain.vo.SysNoticeVo" id="SysNoticeResult">
        <result property="noticeId" column="notice_id"/>
        <result property="noticeTitle" column="notice_title"/>
        <result property="noticeType" column="notice_type"/>
        <result property="noticeContent" column="notice_content"/>
        <result property="status" column="status"/>
        <result property="remark" column="remark"/>
        <result property="createBy" column="create_by"/>
        <result property="createByName" column="create_by_name"/>
        <result property="createTime" column="create_time"/>
        <result property="readStatus" column="read_status"/>
    </resultMap>
    
    <select id="selectMyNoticePage" resultMap="SysNoticeResult">
        SELECT 
            n.notice_id,
            n.notice_title,
            n.notice_type,
            n.notice_content,
            n.status,
            n.remark,
            n.create_by,
            n.create_time,
            IFNULL(s.read_status, '0') AS read_status
        FROM  sys_notice as n JOIN
        (select message_id,status as read_status,user_id FROM sys_notice_status WHERE (status ='0 'or status='1') and user_id = #{userId}) as s
            ON n.notice_id = s.message_id
        ${ew.customSqlSegment}
    </select>

</mapper>