JSTL variables are not shown in EL [duplicate]

2020-02-06 07:29发布

This question already has answers here:

EL expressions not evaluated in JSP (2 answers)

JSTL variable values are not shown in EL. For example this code:

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="s" uri="http://www.springframework.org/tags" %>
<html>
<body>
  <c:forEach var="i" begin="1" end="5" >
    <c:out value="${i}" /> 
  </c:forEach>
</body>
</html>

browser renders like: ${i} ${i} ${i} ${i} ${i}

Or this one:

<c:set var="someVar" value="Hello"/>
<c:out value="${someVar}"/>

browser displays: ${someVar}

I'm using Spring-MVC 3 and Maven to build the sample project, deploying it to Tomcat 7. In Spring's context I have view resolver configurated as follows:

<bean class=
    "org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="viewClass" value="
        org.springframework.web.servlet.view.JstlView"></property>
    <property name="prefix" value="/WEB-INF/"></property>
    <property name="suffix" value=".jsp" />
</bean>

Model variables passed form Spring's controller not shown as well.

Mavens pom.xml has following jstl related dependencies:

<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</version>
    <scope>runtime</scope>
</dependency>
<dependency>
    <groupId>javax.servlet.jsp</groupId>
    <artifactId>jsp-api</artifactId>
    <version>2.1</version>
    <scope>provided</scope>
</dependency>

So, any suggestions how to resolve this?

<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_5.xsd" version="2.5">  </web-app>