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javax.servlet.JspTagException:Illegal use of <when>-style tag without <choose >as its di

2015-03-25 21:38 495 查看

1、错误描述

javax.servlet.JspTagException:Illegal use of <when>-style tag without <choose >as its direct parent

2、错误原因

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jstl/core_rt"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>

<title></title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">

</head>

<body>
<table>
<tr>
<th>时间</th>
<th>地域</th>
<th>姓名</th>
<th>年龄</th>
<th>性别</th>
<th>QQ</th>
<th>地址</th>
<th>爱好</th>
<th>备注</th>
</tr>
<tr>
<c:forEach var="area" varStatus="areaStatus" items="{areaList}">
<c:when test="areaList == null || areaList.size()==0">
<td colspan="9"><center>无数据</center></td>
</c:when>
<c:otherwise>
<td>${area.statisDate}</td>
<td>${area.areaDesc}</td>
<td>${area.username}</td>
<td>${area.age}</td>
<td>${area.sex}</td>
<td>${area.qq}</td>
<td>${area.address}</td>
<td>${area.intester}</td>
<td>${area.shuoMing}</td>
</c:otherwise>
</c:forEach>
</tr>
</table>
</body>
</html>

3、解决办法

（1）将<c:when></c:when>换成<c:if>

（2）利用struts2中的s标签中的<s:if>

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