struts2中迭代标签的使用，用类似数组的方式取值

<s:iterator value="instanceList" id="instance" status="stat">

<tr id='tr_<s:property value="#stat.index + 1"/>'>

<td width="22%"><b>实例IP</b><s:textfield name="%{'instanceList['+#stat.index+'].ip'}" cssClass="reqfield" /></td>

<td width="22%">

<b>操作系统</b>

<s:select cssStyle="WIDTH: 60%" list="osTypeList" cssClass="reqfield" id="osType"

name="%{'instanceList['+#stat.index+'].osType'}" listKey="code" listValue="value"

headerKey="" headerValue="-- 请选择 --" />

</td>

<td width="22%"><b>登录帐户</b><s:textfield name="%{'instanceList['+#stat.index+'].user'}" cssClass="reqfield" /></td>

<td width="22%"><b>登录密码</b><s:password name="%{'instanceList['+#stat.index+'].password'}" cssClass="reqfield" /></td>

<td width="12%">

<s:if test="%{#stat.index != 0}">

[<a href='javascript:deleteCurrentRow(<s:property value="#stat.index + 1"/>)' class="deleteRow">删除</a> ]

</s:if>

</td>

</tr>

</s:iterator>