struts2 使用总结，struts2总结,嵌套循环 list中的l

struts2 使用总结，struts2总结,嵌套循环 list中的l

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" />