struts2-标签中时间比较的方法

<s:iterator value="result" id="bean" status="li">
     <s:set name="defaultTime" value="new java.util.Date()"></s:set>
    <s:if test='#lessTime !=null && #defaultTime>#lessTime'>
        123
    </s:if>
</s:iterator>


  <s:if test="(yesterDay<workDate) && (workDate<nowDate)">
              <a href="endPlan.action?id=${id}">签退</a>
</s:if>