Java JSTL1.2 根据 TLD 或标签文件中的属性指令，属性 var 不接受任何表达式
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JSTL1.2 According to TLD or attribute directive in tag file, attribute var does not accept any expressions
提问by sethu
I have been searching all over google for an answer and it doesn't work.
我一直在谷歌上搜索答案，但没有用。
I am getting this error:
我收到此错误：
org.apache.jasper.JasperException: /WEB-INF/pages/calendarEntry.jsp (line: 5, column: 46) According to TLD or attribute directive in tag file, attribute var does not accept any expressions
org.apache.jasper.JasperException: /WEB-INF/pages/calendarEntry.jsp (line: 5, column: 46) 根据标记文件中的 TLD 或属性指令，属性 var 不接受任何表达式
Here's my jsp file
这是我的jsp文件
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<div class="col-sm-9 col-sm-offset-3 col-md-10 col-md-offset-2 main">
<c:set var="eventDate" value="${calendarEntry.date}"/>
<h1 class="page-header">Calendar Event on <fmt:formatDate value="date" var="${eventDate}" /></h1>
The error is happening at the last line. fmt
错误发生在最后一行。调剂
Web App declartion
网络应用声明
<web-app version="3.1"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_1.xsd">
Maven Depedencies
Maven 依赖项
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.3.0</version>
<scope>provided</scope>
</dependency>
Deployment Environment - Tomcat 8
部署环境 - Tomcat 8
采纳答案by sethu
Thanks for helping everyone. I realised it was a stupid mistake from my side..
谢谢大家的帮助。我意识到这是我的一个愚蠢的错误..
Instead of
代替
<fmt:formatDate value="date" var="${eventDate}" />
It should be
它应该是
<fmt:formatDate type="date" value="${calendarEntry.date}"
回答by cbach
<fmt:formatDate value="date" var="${eventDate}" />
Switch value and var.
切换值和变量。
<fmt:formatDate var="date" value="${eventDate}" />
回答by lucumt
You should change attribute varto pattern,you can try as below:
您应该将属性var更改为pattern，您可以尝试如下：
<fmt:formatDate value="${eventDate}" pattern="yyyy-MM-dd HH:mm:ss"/>
<fmt:formatDate value="${eventDate}" pattern="yyyy-MM-dd HH:mm:ss"/>
You can change the value of patternbased on your own,and it has nothing to do with the order of valueand pattern
可以根据自己的情况更改pattern的值，与value和pattern的顺序无关
回答by Kimball Robinson
I had a similar problem, and this answer points to basically trying two different taglib declarations. Perhaps try both of them?
我有一个类似的问题，这个答案指向基本上尝试两个不同的 taglib 声明。也许两个都试试？
Format Date with fmt:formatDate JSP
Switching to the taglib you have declared in your jsp file solved my problem, ironically.
具有讽刺意味的是，切换到您在 jsp 文件中声明的 taglib 解决了我的问题。
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
vs
对比
<%@ taglib prefix="fmt" uri="http://java.sun.com/jstl/fmt" %>
回答by Hemantha
In netbeans it does not create a web.xml file automatically now.(previously in j2ee it was created. it is optional for some cases.I face the same issue with the jstl remove attribute and after I created the web.xml file the issue was gone.but corrected one is a new project
在 netbeans 中，它现在不会自动创建 web.xml 文件。（以前在 j2ee 中它是创建的。在某些情况下它是可选的。我遇到了与 jstl remove 属性相同的问题，并且在我创建了 web.xml 文件后问题不见了。但更正的是一个新项目
回答by Jayesh
I had similar issue. I changed Tomcat version to- apache-tomcat-7.0.39 instead of -apache-tomcat-7.0.54 from SERVER- Runtime Environment
我有类似的问题。我将 Tomcat 版本更改为 - apache-tomcat-7.0.39 而不是 SERVER- Runtime Environment 中的 -apache-tomcat-7.0.54
