I noticed this issue while working with Spring demo.
Lets discuss first what was my settings and what I tried to make it work, then will take about the solution.
I was setting the variable in the spring Controller like below:
@RequestMapping("/hello")
public ModelAndView helloWorld() {
String message = "HELLO SPRING MVC";
return new ModelAndView("abcd", "msg", message);
}
/* Even I tried below way of setting the variable msg */
@RequestMapping("/welcome")
public String welcomeWorld(Model m) {
String s = "HELLO SPRING MVC";
m.addAttribute("msg", s);
return "welcome";
}
And I was trying to use the "msg" variable in the JSP (abcd.jsp) as below:
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="s" uri="http://www.springframework.org/tags" %>
<html>
<body>
Message is: <%= request.getAttribute("msg") %> <br/>
Message is: <c:out value="${msg}" /> <br/>
Message is: ${"msg"} <br/>
Message is: ${msg} <br/>
</body>
</html>
Tried every possible combination of displaying the variable in the jsp.
But I was not getting any value corresponding to the variable when used along with the EL $, I used to get below response through JSP page when run under tomcat 5.5.x:
So, after googling out, I found that, its the Servlet and JSP versions not compatible with the server.
Basically in my web.xml I had declared the version of Servlet I am using is 2.5 as below:
<?xml version="1.0" encoding="UTF-8"?> <web-app 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_2_5.xsd" version="2.5"> <servlet> <servlet-name>spring</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>spring</servlet-name> <url-pattern>*.html</url-pattern> </servlet-mapping> </web-app>
But, I was deploying above application on a Tomcat server of version 5.5.x (which supports Servlets version 2.4). And that was the main root cause.
So, When I deployed the application to Tomcat 6.x (supporting Servlets 2.5 and a higher version of JSP and EL), It worked fine.
Now I am getting the expected result of the above JSP (abcd.jsp) page, the output is shown below:
Hope this helps you too!!
References I followed:
http://stackoverflow.com/tags/jstl/info
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