jsp通过s:iterator实现一对多展示

<tr>
          <th width="8%">
           序号
          </th>
          <th width="20%">
           会场名称
          </th>
          <th width="26%">
           开始时间
          </th>
          <th width="26%">
           结束时间
          </th>
          <th width="20%">
           申请状态
          </th>
         </tr>
         <%int index = 1;%>
         <s:iterator var="s" value="#request.usageList">
         <tr>
          <td style="text-align:center">
           <%=index++ %>
          </td>
          <s:if test="#strid!=#s.room_id">
            <s:set id="strid" value="%{#s.room