参考:https://bbs.csdn.net/topics/391838987
<!-- 查询条件:创建开始时间 -->
<if test="createdBegintime!=null and reatedBegintime!=''">
AND CREATED >= #{createdBegintime}
</if> <!-- 查询条件:创建结束时间 -->
<if test="createdEndtime!=null and createdEndtime!=''">
AND CREATED <= #{createdEndtime}
</if>