freemaker 模板问题总结

1，判断是否为空

<div class="formformat"><label>是否推荐：</label>
                 <select class="formselect" id="isrecommend" >
                      <option value="Y" <#if articleVo.isRecommend!""=="Y"||  (articleVo.isRecommend)??>selected</#if> >是
                      </option>
                      <option value="N"
                       <#if articleVo.isRecommend!""=="N">selected</#if>>否</option>
                 </select>
</div>