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attribute value does not accept any expressions

 
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According to TLD or attribute directive in tag file, attribute value does not accept any expressions

执行某jsp页面时,弹出如标题所示异常,jsp代码如下:

<%@ page language="java" contentType="text/html;charset=gbk" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jstl/fmt" %> 
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
  </head>
  
  <body>
    This is the result:
    <c:out value="${userInfo}" default="没有结果"/>
  </body>
</html>


异常的原因是不能识别“${userInfo}”,解决办法有两种:
一、在page指令里,加入isELIgnored="true"属性,即
<%@ page language="java" contentType="text/html;charset=gbk"  isELIgnored="true" %>
二、把<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %>变为:
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core_rt"  %>
经过改动之后,jsp页面能正常执行了。

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