ibatis 组装动态排序

使用#orderstr#是会有问题的，ibatis会自动给你加上单引号，应该使用如下
<dynamic prepend="ORDER BY">
   <isNotEmpty property="order">
    $order$ $sortDirection$
   </isNotEmpty>
  </dynamic>

例子：

<select id="getNewsList" resultMap="newsResult" parameterClass="map">
  select NEWS_ID,BLOCK_ID,NEWS_TITLE,NEWS_CONTENT,NEWS_SECONDTITLE,NEWS_SUMMARY,NEWS_AUTHOR,NEWS_SOURCE,NEWS_ANNEX,NEWS_TIME,NEWS_OPEN,NEWS_KEYWORDS,NEWS_APPROVE,ISTOP,BROWSENUM,NEWS_COMMENT,NEWS_REFUSE,NEWS_AUDITOR,lasteditor,prjid,prjname,wsflag,MEM_NAME,LASTEDITTIME,ISBLOCKPIC from yc_news where BLOCK_ID = #blockid#
  <dynamic prepend="ORDER BY">
   <isNotEmpty property="orderstr">
    $orderstr$
   </isNotEmpty>
  </dynamic>
 </select>