JSP页面跳转显示数据问题!弄了几天了!求解决
<struts>
<package name="mintao" extends="struts-default">
<action name="zw" class="stuaction">
<result type="redirectAction">getall</result>
<result name="input">addstu.jsp</result>
</action>
<action name="getall" class="stuaction" method="getall">
<result>showlist.jsp</result>
<result name="input">addstu.jsp</result>
</action>
<action name="delstu" class="stuaction" method="delStudent">
<result type="redirectAction">getall</result>
<result name="input">detail.jsp</result>
</action>
<action name="updatestu" class="stuaction" method="updateStu">
<result type="redirectAction">getall</result>
<result name="input">detail.jsp</result>
</action>
<action name="getstu" class="stuaction" method="getStuById">
<result>detail.jsp</result>
<result name="input">showlist.jsp</result>
</action>
</package>
</struts>
//这个是showlist.jsp
<body>
<form action="updatestu.action?id=${sid}" method="post">
<table>
<tr>
<td>编号</td>
<td>姓名</td>
<td>年龄</td>
<td>住址</td>
<td>联系电话</td>
<td>所在学校</td>
<td>操作</td>
</tr>
<!-- iterator 迭代 循环显示 -->
<s:iterator var="stu" value="stulist" >
<tr>
<td><s:property value="sid"/></td>
<td><s:property value="sname"/></td>
<td><s:property value="sage"/></td>
<td><s:property value="sadress"/></td>
<td><s:property value="sphone"/></td>
<td><s:property value="school"/></td>
<!-- 当点击详细的时候,就是进行查询单个的操作,根据传的id查询对应的单个 -->
<td><input type="button" value="详细" onclick="javascript:location.href='getstu.action?id=${sid}'"/></td>
</tr>
</s:iterator>
</table>
</form>
</body>
</html>
//这个是detail.jsp
<body>
<form action="">
<table>
<tr>
<td>姓名:</td>
<td><input type="text" value="${stu.sname }"></input></td>
</tr>
<tr>
<td>年龄:</td>
<td><input type="text" value="${stu.sage }"></input></td>
</tr