嵌套循环 list中的list

<s:iterator id="list" value="infoList" status="sta">  <s:iterator id="info" value=“infoList[#sta.index]">     <p>      <a href="/expert/a/${info.infoId }.shtml" title="${info.subject }">      <s:if test="subject.length()>=21">          <s:property value='subject.substring(0,20)'/><b>. . .</b>      </s:if>        <s:else>          ${info.subject }      </s:else>      </a>      <span><s:date name="publicTime" format="yyyy-MM-dd" /></span>     </p>  </s:iterator>  </s:iterator>

限制循环次数，取前几条记录

<s:subset source="infoList[#sta.index]" start="0" count= "1" >  <!-- start 开始 count 显示几条 -->      <s:iterator id="info"      <p>      <a href="/expert/a/${info.infoId }.shtml" title="${info.subject }">      <s:if test="subject.length()>=21">          <s:property value='subject.substring(0,20)'/><b>. . .</b>      </s:if>          <s:else>          ${info.subject }      </s:else>      </a><span><s:date name="publicTime" format="yyyy-MM-dd" /></span>          </p>      </s:iterator>  </s:subset>

集合list 的长度

<s:property value="list.size"/><br/>    <s:property value="list.size()"/><br/>    <s:property value="#request.list.size"/><br/>    <s:property value="#request.list.size()"/><br/>

判断list是否为空

<s:if test="memExpertList == null || memExpertList.size <= 0">        <tr><td align="center" colspan="3" height="23"><font color="red"> 无相关记录！</font></td></tr>  </s:if>

struts2截取字符串，超过长度省略号

<s:if test="subject.length()>=21"><s:property value='subject.substring(0,20)'/><b>. . .</b></s:if>     <s:else>${info.subject }</s:else>

struts2时间格式化

<s:date name="publicTime" format="yyyy-MM-dd HH:mm:ss" />