ModelAndView’s model value is not displayed in JSP via EL
Problem
In Spring MVC development, developer try to set a value into a model, and display the value in JSP via EL, e.g ${msg}, but it just outputs the result as it is – ${msg}, not the “value” stored in the model. The EL is just not working in JSP, why?
Spring’s Controller
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.AbstractController;
public class ABCController extends AbstractController{
@Override
protected ModelAndView handleRequestInternal(HttpServletRequest request,
HttpServletResponse response) throws Exception {
ModelAndView model = new ModelAndView("HelloWorldPage");
model.addObject("msg", "hello world");
return model;
}
}
JSP page
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<body>
${msg}
</body>
</html>
Solution
This is the common asked question in the most Spring MVC hello world example. Actually it’s caused by the old JSP 1.2 descriptor.
1. JSP 1.2
If you are using the old JSP 1.2 descriptor, defined by DTD ,for example
web.xml
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
//...
</web-app>
The EL is disabled or ignored by default, you have to enable it manually, so that it will outputs the value store in the “msg” model.
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<%@ page isELIgnored="false" %>
</head>
<body>
${msg}
</body>
</html>
2. JSP 2.0
If you are using the standard JSP 2.0 descriptor, defined by w3c schema ,for example
web.xml
<web-app id="WebApp_ID" version="2.4"
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_4.xsd">
//...
</web-app>
The EL is enabled by default, and you should see the value stored in the “msg” model, which is “hello world”.
Reference
About Author
I am using servlet 3.0 version but same problem here.
yeah… same for me.
but don’t know what to do..
Tried the solution ..but still not working.. 🙁
Thanks for sharing helpful information.. Saved my time…
thank
Thank you so much .
<%@ page isELIgnored=”false” %> use this tag in your jsp header
isELIgnored=”false”
include this in your jsp page.
wow, thank you so much, to many pages and only here I found the answer to my problem.
Thank you, I spent more than 5 hours to fix that. You saved me!!
Nearly over 10 years, this solution is still so helpful!
nice thanks
Thanks for this answer.
It Works, Thanks
Thank you very much! It saved my day
thank you so much!
Thank you, I spent weeks looking for a fix. You saved my day
Thanks!!!!
thanks alot mkyong, i almost gave up….u saved me…
Wow. same problem I faced. Every Spring MVC tutorial should include this.
Save me a day!!!
Thanks good job!
Thanks a lot for the great help. I wasted 1 day to search why ${} is not working
Thanks a lot man,this helped a lot.
Thanks!!!
Awesome! I was literally scratching my head for hours on why ${} is not working. Thanks a lot.
can we skip this JSTL part and use the controller passed variables directly like:
instead of ${message}
890870
this was just my problem, thank you
Great. Thank you so much
THANK YOU VERY MUCH!