字符串切割方式split，用mybatisplus的方式在mapper层改

<if test="resident.tagsId != null and resident.tegsId = ''">
       <foreach collection="resident.tagsId.split(',')" item="item" >
            and exists (select resident_id from sys_resident_tags
            where resident_id = sr.resident_id AND tags_id = #{item})
       </foreach>
</if>