[rob.antici]

– System Setup ——————————-
Operating System and version: win2k
Eclipse version: 2.1.1
Eclipse build id: 200306271545
MyEclipse version: 2.7RC2
Eclipse JDK version: 1.4
Application Server JDK version: using weblogic 8.1, jdk 1.4

– Message Body ——————————-
I have a simple JSP using JSTL
I include the core JSTL library, <%@taglib uri=”http://java.sun.com/jstl/core&#8221; prefix=”c” %>

I then have this simple statement: The user info from the browser is: <c:out value=”${header[‘User-Agent’]}” default=”unknown”/>

Weblogic runs the JSP just fine but MyEclipse is reporting this error on the task list. “unknown user tag <c:out… check http://java.sun.com/jstl/core

I’m sure there must be a good reason for this, as everyone using JSTL can’t be putting up with these kind of errors.

thanks

[Riyad Kalla]

Did you put entries in your web.xml file for these taglibs? (In the mean time I’m downloading the JSTL libs to try this out)

[Riyad Kalla]

Rob,
I just tried this setup and everything worked fine. The only difference is that I’m using Eclipse 2.1.2 GTK on Linux and JDK 1.4.2_03

[rob.antici]

I had my taglib location set to WEB-INF/lib/standard.jar which contains c.tld.
This didn’t work, I guess I need to specify the .tld specifically? When I made the change I did get
rid of the error.

thanks

[support-michael]

We have a test project similar to what you describe. You should not have to add the taglib entry to your web.xml file or explicitly include the c.tld in your project if it includes the packaged version of the JSTL core taglib, i.e.g., <web-root>/WEB-INF/lib/standard.jar. There was a PR on this for the RC1-2 releases that has been addressed in the upcoming release. Until the next release on occasion when adding a packaged taglib (a jar) to your project you may need to recycle ME to get it to reload the packaged taglibs since they are currently cached when the project is 1st opened for performance reasons.

[Riyad Kalla]

Michael,
w.r.t. to reloading TLDs, is there a PR for the next release to perform a reload on a taglib when the TLD is saved? (i.e. actively being developed?). Currently people need to close/reopen their project for it to reload.

[support-michael]

Yes, there is a fix in the current development code stream to clear the internal TLD and code cache for changes to TLD, web.xml, and jar files. This feature will be in the next release.

[No Operation]

off topic:

<c:out value=”${header[User-Agent’]}” …

and

<!DOCTYPE web-app PUBLIC “-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN” “http://java.sun.com/dtd/web-app_2_3.dtd”&gt;

means that you try to use EL-Expressions with JSP 1.2.

For more information look into jsp-2_0-fr-spec.pdf, Table JSP.3-1 EL Evaluation Settings for JSP Pages:
EL: Ignored if web.xml <= 2.3
so the web.xml should look like this:

<?xml version="1.0" encoding="ISO-8859-1"?>
<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_4.xsd” version=”2.4”>
...

NOP

[Riyad Kalla]

Yes you are quite right, thank you for pointing out the error.

[deskenny]

I’m having a different problem with JSTL/JSPs within MyEclipse.

I’m getting a

“Error javax/servlet/jsp/JspContext”

whenever I try and use any of the JSTL tags. They all actually work when I access the deployed page, so the standard.jar, web.xml are all fine.

The error appears if I enter any “${header[‘User-Agent’]}” type entries

<c:choose>
<c:when test=”${index%2==1}”>
<tr bgcolor=#FFFFCE>
</c:when>
<c:otherwise>
<tr bgcolor=#FFFFFF>
</c:otherwise>
</c:choose>

Functions correctly, but shows an error within MyEclipse jsp editor

I’ve tried mimicing the deployment described earlier in this post, but the same error results

Anyone come across anything similar?

cheers

P.S. I’m using Eclipse Version: 2.1.2
Build id: 200311030802 under WindowsXP, JRE 1.4.1_01, Tomcat 5.0

P.P.S MyEclipse has made life much much easier compared to Lomboz/Sysdeo plugins

[deskenny]

Turns out I was using a bum version of JSTL. Started using “standard-1.0” with JRE 1.4.2 and all is fine. No need to make web.xml changes, just dropped the correct version of standard.jar into the WEB-INF/lib dir.

Works well

[Riyad Kalla]

Thanks for following up with this thread with us, we are glad its working for you.

[Author]

Posts