表达语言与Eclipse警告：“项目”不支持运行时表达式 [英] Expression Language & Eclipse warning: "items" does not support runtime expressions
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问题描述
我有以下JSP：
<％@ page contentType =text / htmlpageEncoding =UTF- 8\" ％>
<％@ taglib uri =http://java.sun.com/jstl/coreprefix =c％>
<％@ page isELIgnored =false％>
<！DOCTYPE HTML PUBLIC - // W3C // DTD HTML 4.01 Transitional // EN
http://www.w3.org/TR/html4/loose.dtd\">
< html>
< head>
< meta http-equiv =Content-Typecontent =text / html; charset = UTF-8>
< title>< c：out value =$ {it.title}/>< / title>
< / head>
< body>
< c：forEach var =speakeritems =$ {it.speakers}varStatus =stat>
< ul>
< li>< c：out value =$ {speaker.person.firstName}/> < c：out value =$ {speaker.person.lastName}/>，< c：out value =$ {speaker.person.address.city.zip}/> < c：out value =$ {speaker.person.address.city.name}/>< / li>
< / ul>
< / c：forEach>
< / body>
< / html>
Eclipse在我的代码中警告我有关每个EL表达式的实例：
警告[第10行]：值不支持运行时表达式
警告[第13行]：items不支持运行时表达式
...
但这不是真的，EL被服务器正确评估。 p>
任何人都可以暗示我正确的方向为什么eclipse会警告我这些EL表达？
解决方案
您的taglib指令导入JSTL 1.0 taglib。它应该是JSTL 1.1（注意URI的区别）：
<％@ taglib uri =http：// java.sun.com/jsp/jstl/coreprefix =c％>
i have the following JSP:
<%@ page contentType="text/html" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jstl/core" prefix="c" %>
<%@ page isELIgnored="false"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title><c:out value="${it.title}"/></title>
</head>
<body>
<c:forEach var="speaker" items="${it.speakers}" varStatus="stat">
<ul>
<li><c:out value="${speaker.person.firstName}" /> <c:out value="${speaker.person.lastName}" />, <c:out value="${speaker.person.address.city.zip}" /> <c:out value="${speaker.person.address.city.name}" /></li>
</ul>
</c:forEach>
</body>
</html>
Eclipse warns me about every instance of EL Expressions in my code:
Warning [line 10]: "value" does not support runtime expressions
Warning [line 13]: "items" does not support runtime expressions
...
this is however not true, EL gets evaluated correctly by the server.
Can anyone hint me in the right direction why eclipse is warning me about those EL expressions?
解决方案
Your taglib directive imports a JSTL 1.0 taglib. It should be JSTL 1.1 instead (note the difference in URI):
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
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