Why JSTL number format value does not support runt

Question

I have this code:

<fmt:formatNumber type="number" 
                  maxFractionDigits="2" 
                  value="${maxAllowableAmount}" />

I have this warning in Eclipse editor:

"value" does not support runtime expressions

I tried to ignore it and run the app, but I have this runtime error:

quote symbol expected

How am I gonna deal with this?

My data comes from the database and I want to format it on my browser.

Answer 1

That's a bit peculiar. If I understand the taglib javadoc correctly, the type attribute can be a runtime value.

Perhaps you are using an older version of JSTL that doesn't support RT/EL? Check what namespace is associated with the 'fmt' prefix in your JSP.

Answer 2

You're using the prehistoric JSTL 1.0 version (or even a prototype). You need to upgrade to at least JSTL 1.1, or if your container supports it (Servlet 2.5 or newer), upgrade to currently latest JSTL 1.2.

You can find JSTL download links in our JSTL wiki page. Don't forget to remove the old JSTL libraries (jstl.jar and standard.jar) and to fix the @taglib declarations to include the /jsp path. Also ensure that your web.xml is declared conform at least Servlet 2.4 for JSTL 1.1 or as at least Servlet 2.5 for JSTL 1.2.

Answer 3

You need an RT/EL version of the tag library.

http://docs.oracle.com/javaee/1.3/tutorial/doc/JSTL4.html#wp67593

Answer 4

Ensure that you are using the correct @ taglib directive. Replace:

<%@ taglib uri="http://java.sun.com/jstl/fmt" prefix="fmt"%>

with:

<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt"%>

The /jsp makes the difference.