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.
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.
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.
来源：https://stackoverflow.com/questions/5417442/jstl-support-in-weblogic