Error coming while using c:out tag in JSTL

I am using JSTL and include the code as follows -:

c ut value="${1 + 2}" /><br>

when i try to run the above code then it gives the following error -:

According to TLD or attribute directive in tag file, attribute value does not accept any expressions

please tell me that whats the mistale and how can i rectify this.

Thanks
regards
Gaurav

Which version of JSTL are you using ?
You are probably using an older one which does not accept expressions.

i am using jstl 1.0, is expression not supported by this version.

How did you declare the taglib in your jsp file ?

yes i have declared in the same way, when i write simply

<c

ut value="JAI SHRI RAM"/>
then it is working correctly, but when i write

<c

ut value="${1+2}"/>

then it is giving error.

Thanks
Regards
Gaurav

If that is the URI you used, then you are using JSTL 1.1. What JSP container are you using?

Try changing to:
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

(rather then http://java.sun.com/jstl/core)

Howdy, I just came across this problem, and although this is an old post now, I felt compelled to clarify the reasons why this was happening.

I was using the JSTL 1.1 standard.jar on tomcat 5.5 (Servlet 2.4), which means all I needed to do to install this was place the standard.jar into WEB-INF/lib of the web application, and then define the taglib reference on the JSP page.

for JSTL 1.1 the URL that should be used is http://java.sun.com/jsp/jstl/core
so this looks like :

where as the JSTL 1.0 URL was
http://java.sun.com/jstl/core
so this would be

As it turns out, the JSTL 1.1 version of standard.jar seems to have the 1.0 compatibility in it as well,
so in my JSP page, I had cut-pasted the URL for 1.0, which works enough to find the c

ut tag, but 1.0 did not support expressions.

So changing the taglib declaration to use the JSTL 1.1 URL fixed this.

This is all well covered in the JSP FAQ.