JSTL support in Weblogic

Question

Im trying to start working with Java EE using Weblogic, and i cant make JSTL tags work, in simpliest code i get the following errors when deploying my application:

index.jsp:1:4: No tag library could be found with this URI. Possible causes could be that the URI is incorrect, or that there were errors during parsing of the .tld file. <%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>

^----^ index.jsp:1:4: No tag library could be found with this URI. Possible causes could be that the URI is incorrect, or that there were errors during parsing of the .tld file. <%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>

^----^ index.jsp:2:4: No tag library could be found with this URI. Possible causes could be that the URI is incorrect, or that there were errors during parsing of the .tld file. <%@taglib prefix="sql" uri="http://java.sun.com/jsp/jstl/sql"%>

^----^ index.jsp:2:4: No tag library could be found with this URI. Possible causes could be that the URI is incorrect, or that there were errors during parsing of the .tld file. <%@taglib prefix="sql" uri="http://java.sun.com/jsp/jstl/sql"%>

I downloaded taglib files from this website: http://archive.apache.org/dist/jakarta/taglibs/standard/ and put two jars(standard.jar and jstl.jar) under my WEB-INF directory. I also put there all the tld files from the arcihve. Ater that i tried referencing them in my web.xml file and after validation i get the following error:

XML validation started. Checking file:/C:/Users/Brodyaga/Documents/NetBeansProjects/Eshop1/web/WEB-INF/web.xml... Referenced entity at "nbres:/org/netbeans/modules/j2ee/ddloaders/catalog/resources/XMLSchema.dtd". Referenced entity at "nbres:/org/netbeans/modules/j2ee/ddloaders/catalog/resources/datatypes.dtd". cvc-complex-type.2.4.a: Invalid content was found starting with element 'taglib'. One of '{"http://java.sun.com/xml/ns/javaee":description, "http://java.sun.com/xml/ns/javaee":display-name, "http://java.sun.com/xml/ns/javaee":icon, "http://java.sun.com/xml/ns/javaee":distributable, "http://java.sun.com/xml/ns/javaee":context-param, "http://java.sun.com/xml/ns/javaee":filter, "http://java.sun.com/xml/ns/javaee":filter-mapping, "http://java.sun.com/xml/ns/javaee":listener, "http://java.sun.com/xml/ns/javaee":servlet, "http://java.sun.com/xml/ns/javaee":servlet-mapping, "http://java.sun.com/xml/ns/javaee":session-config, "http://java.sun.com/xml/ns/javaee":mime-mapping, "http://java.sun.com/xml/ns/javaee":welcome-file-list, "http://java.sun.com/xml/ns/javaee":error-page, "http://java.sun.com/xml/ns/javaee":jsp-config, "http://java.sun.com/xml/ns/javaee":security-constraint, "http://java.sun.com/xml/ns/javaee":login-config, "http://java.sun.com/xml/ns/javaee":security-role, "http://java.sun.com/xml/ns/javaee":env-entry, "http://java.sun.com/xml/ns/javaee":ejb-ref, "http://java.sun.com/xml/ns/javaee":ejb-local-ref, "http://java.sun.com/xml/ns/javaee":service-ref, "http://java.sun.com/xml/ns/javaee":resource-ref, "http://java.sun.com/xml/ns/javaee":resource-env-ref, "http://java.sun.com/xml/ns/javaee":message-destination-ref, "http://java.sun.com/xml/ns/javaee":persistence-context-ref, "http://java.sun.com/xml/ns/javaee":persistence-unit-ref, "http://java.sun.com/xml/ns/javaee":post-construct, "http://java.sun.com/xml/ns/javaee":pre-destroy, "http://java.sun.com/xml/ns/javaee":message-destination, "http://java.sun.com/xml/ns/javaee":locale-encoding-mapping-list}' is expected. [12] XML validation finished.

My web.xml goes as following:

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 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">
    <session-config>
        <session-timeout>
            30
        </session-timeout>
    </session-config>
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>

    <taglib>
        <taglib-uri>http://java.sun.com/jstl/fmt</taglib-uri>
        <taglib-location>/WEB-INF/fmt.tld</taglib-location>
    </taglib>

    <taglib>
        <taglib-uri>http://java.sun.com/jstl/fmt-rt</taglib-uri>
        <taglib-location>/WEB-INF/fmt-rt.tld</taglib-location>
    </taglib>

    <taglib>
        <taglib-uri>http://java.sun.com/jstl/core</taglib-uri>
        <taglib-location>/WEB-INF/c.tld</taglib-location>
    </taglib>

    <taglib>
        <taglib-uri>http://java.sun.com/jstl/core-rt</taglib-uri>
        <taglib-location>/WEB-INF/c-rt.tld</taglib-location>
    </taglib>

    <taglib>
        <taglib-uri>http://java.sun.com/jstl/sql</taglib-uri>
        <taglib-location>/WEB-INF/sql.tld</taglib-location>
    </taglib>

    <taglib>
        <taglib-uri>http://java.sun.com/jstl/sql-rt</taglib-uri>
        <taglib-location>/WEB-INF/sql-rt.tld</taglib-location>
    </taglib>

    <taglib>
        <taglib-uri>http://java.sun.com/jstl/x</taglib-uri>
        <taglib-location>/WEB-INF/x.tld</taglib-location>
    </taglib>

    <taglib>
        <taglib-uri>http://java.sun.com/jstl/x-rt</taglib-uri>
        <taglib-location>/WEB-INF/x-rt.tld</taglib-location>
    </taglib>
</web-app>

I believe that xml schema specified in the beginning of web.xml doesnt allow taglib tags, but i have no idea what schema i should use.

I'd really apprectiate some step by step tutorial for adding jstl support to weblogic. Thanks in advance.

UPDATE Removing those <taglib>'s from web.xml ends up with erros such as following:

index.jsp:18:14: The tag handler class was not found "org.apache.taglibs.standard.tag.rt.core.ForEachTag".

and by the contents of c.tld file its clear that weblogic understands that forEach corresponds to org.apache.taglibs.standard.tag.rt.core.ForEachTag, but cant find the class. But i can manually find this class in standard.jar.

Solution 1

You have to include both jstl.jar and standard.jar in the WEB-INF/lib folder, not in the WEB-INF folder. I guess that will solve this problem.

Solution 2

add the library-ref in weblogic.xml:

<?xml version="1.0" encoding="UTF-8"?>
<wls:weblogic-web-app xmlns:wls="http://xmlns.oracle.com/weblogic/weblogic-web-app" 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/ejb-jar_3_0.xsd http://xmlns.oracle.com/weblogic/weblogic-web-app http://xmlns.oracle.com/weblogic/weblogic-web-app/1.2/weblogic-web-app.xsd">
    <wls:library-ref>
        <wls:library-name>jstl</wls:library-name>
        <wls:specification-version>1.2</wls:specification-version>
        <wls:exact-match>false</wls:exact-match>
    </wls:library-ref>
</wls:weblogic-web-app>

jstl library is deployed by default in WebLogic, so no worries on that side.

Comments

[Anton]

jeez, so easy and so helpful. Thanks!

[bouncingHippo]

i have the same problem and i made sure i have those files in the lib folder, yet it still happens...