Taglib uri problem

Hi all
I created a web module project and add a JSP file u201CcustomTagWelcome.jspu201D and a TLD file u201Cadvjhtp1-taglib.tldu201D to the webContent directory. I added also a tag handler
u201CWelcomeTagHandleru201D.
The jsp code:
<?xml version = "1.0"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">


<%-- taglib directive --%>
<%@ taglib uri = "advjhtp1-taglib.tld" prefix = "advjhtp1" %>
<html xmlns = "http://www.w3.org/1999/xhtml">
   <head>
      <title>Simple Custom Tag Example</title>
   </head>
   <body>
      <p>The following text demonstrates a custom tag:</p>
      <h1>
         <advjhtp1:welcome />
      </h1>
   </body>
</html>
The tld content:
<?xml version = "1.0"?>
<!DOCTYPE taglib PUBLIC
   "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.1//EN"
      "http://java.sun.com/j2ee/dtds/web-jsptaglibrary_1_1.dtd">

<taglib>
   <tlibversion>1.0</tlibversion>
   <jspversion>1.1</jspversion>
   <shortname>advjhtp1</shortname>
   <info>
      A simple tab library for the examples
   </info>
   
   <tag>
      <name>welcome</name>
      <tagclass>
         com.deitel.advjhtp1.jsp.taglibrary.WelcomeTagHandler
      </tagclass>
      <bodycontent>empty</bodycontent>
      <info>
         Inserts content welcoming user to tag libraries
      </info>
   </tag>
   
   <tag>
      <name>welcome2</name>
      <tagclass>
         com.deitel.advjhtp1.jsp.taglibrary.Welcome2TagHandler
      </tagclass>
      <bodycontent>empty</bodycontent>
      <info>
         Inserts content welcoming user to tag libraries. Uses
         attribute "name" to insert the user's name.
      </info>
      <attribute>
         <name>firstName</name>
         <required>true</required>
         <rtexprvalue>true</rtexprvalue>
      </attribute>
   </tag>
   
   
   <tag>
      <name>guestlist</name>
      <tagclass>
         com.deitel.advjhtp1.jsp.taglibrary.GuestBookTag
      </tagclass>
      <teiclass>
         com.deitel.advjhtp1.jsp.taglibrary.GuestBookTagExtraInfo
      </teiclass>
      <bodycontent>JSP</bodycontent>
      <info>
         Iterates over a list of GuestBean objects
      </info>
   </tag>
</taglib>
In the u201Cothersu201D tab of web.xml I choose the tag-libs and for Taglib Location I choose the advjhtp1-taglib.tld. The Taglib Location is advjhtp1-taglib.tld. I added u201Cadvjhtp1-taglib.tldu201D as URI .
When I run the jsp in browser
http://devsrv:50000/servlet_jsp/customTagWelcome.jsp
I get the following exception:
#1.5 #0019DB661008005B0000008A000013B000044FA2C2FDE9C9#1213460381553#com.sap.engine.services.servlets_jsp.server.jsp.JSPParser#sap.com/servlet_jsp_test#com.sap.engine.services.servlets_jsp.server.jsp.JSPParser#Guest#0####b16b6e103a2d11ddb85a0019db661008#SAPEngine_Application_Thread[impl:3]_20##0#0#Error#1#/System/Server#Plain###application [servlet_jsp] Runtime error in compiling of the JSP file <C:/usr/sap/EP7/JC00/j2ee/cluster/server0/apps/sap.com/servlet_jsp_test/servlet_jsp/servlet_jsp/root/customTagWelcome.jsp> !
The error is: com.sap.engine.services.servlets_jsp.lib.jspparser.exceptions.JspParseException: Tag library descriptor cannot be found for uri:].
Exception id: [0019DB661008005B00000088000013B000044FA2C2FDE89A]#
#1.5 #0019DB661008005B0000008B000013B000044FA2C2FDEBF1#1213460381553#com.sap.engine.services.servlets_jsp.client.RequestInfoServer#sap.com/servlet_jsp_test#com.sap.engine.services.servlets_jsp.client.RequestInfoServer#Guest#0####b16b6e103a2d11ddb85a0019db661008#SAPEngine_Application_Thread[impl:3]_20##0#0#Error##Plain###application [servlet_jsp] Processing HTTP request to servlet [jsp] finished with error. The error is: com.sap.engine.services.servlets_jsp.server.exceptions.WebIOException: Internal error while parsing JSP page [C:/usr/sap/EP7/JC00/j2ee/cluster/server0/apps/sap.com/servlet_jsp_test/servlet_jsp/servlet_jsp/root/customTagWelcome.jsp].
     at com.sap.engine.services.servlets_jsp.server.jsp.JSPParser.parse(JSPParser.java:118)
     at com.sap.engine.services.servlets_jsp.server.servlet.JSPServlet.getClassName(JSPServlet.java:238)
     at com.sap.engine.services.servlets_jsp.server.servlet.JSPServlet.compileAndGetClassName(JSPServlet.java:429)
     at com.sap.engine.services.servlets_jsp.server.servlet.JSPServlet.service(JSPServlet.java:169)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:401)
     at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:266)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:387)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:365)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:944)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:266)
     at com.sap.engine.services.httpserver.server.Client.handle(Client.java:95)
     at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:175)
     at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:33)
     at com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java:41)
     at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
     at java.security.AccessController.doPrivileged(Native Method)
     at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:100)
     at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:170)
Caused by: com.sap.engine.services.servlets_jsp.lib.jspparser.exceptions.JspParseException: Tag library descriptor cannot be found for uri:].
     at com.sap.engine.services.servlets_jsp.lib.jspparser.syntax.JspTaglibDirective.verifyAttributes(JspTaglibDirective.java:146)
     at com.sap.engine.services.servlets_jsp.lib.jspparser.syntax.JspDirective.parse0(JspDirective.java:141)
     at com.sap.engine.services.servlets_jsp.lib.jspparser.syntax.JspDirective.parse(JspDirective.java:102)
     at com.sap.engine.services.servlets_jsp.lib.jspparser.syntax.ElementCollection.parse(ElementCollection.java:89)
     at com.sap.engine.services.servlets_jsp.lib.jspparser.syntax.ParserImpl.parse(ParserImpl.java:536)
     at com.sap.engine.services.servlets_jsp.server.jsp.JSPParser.initParser(JSPParser.java:340)
     at com.sap.engine.services.servlets_jsp.server.jsp.JSPParser.parse(JSPParser.java:106)
     ... 18 more
What is wrong with URI?
Thanks in advance
Yoel

Hi,
You need to add an entry for the <taglib-location> and <taglib-uri>
in the web.xml for using a tld in the project.
And then need to use the same url name in the jsp.
You can go through the following link for the details about web.xml:
http://edocs.bea.com/wls/docs61/webapp/web_xml.html#1017621
Thanks
Ritushree

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     at oracle.jsp.parse.JspUtils.loadClass(JspUtils.java:209)
I have to hardcode the app name in order to make it work. Is there any good solution?
<%@ taglib uri="//webapp/WEB-INF/chartlib.tld" prefix="chartlib" %>
And it just solve the exception problem, it actually cannot show the chart. Anyone use the jfreechart or has problem in using custom tag library?
Matthew

I put the chartlib.tld in /WEB-INF/ and here is my web.xml. The uri of the taglib directive in JSP is exactly the taglib-uri here for each case.
<taglib>
<taglib-uri>/WEB-INF/chartlib.tld</taglib-uri>
<taglib-location>/WEB-INF/chartlib.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>chartlib-01.tld</taglib-uri>
<taglib-location>/chartlib.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>chartlib-02.tld</taglib-uri>
<taglib-location>/no_chartlib.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>chartlib-03.tld</taglib-uri>
<taglib-location>/WEB-INF/chartlib.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>chartlib-04.tld</taglib-uri>
<taglib-location>chartlib.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>chartlib-05.tld</taglib-uri>
<taglib-location>no_chartlib.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/WEB/chartlib.tld</taglib-uri>
<taglib-location>/WEB-INF/chartlib.tld</taglib-location>
</taglib>
And I have modified the source code in JspDirectiveTaglib.java to output some debug message, where s1 is the value of uri in JSP, s3 is the value of taglib-location in web.xml. Here is the result. It tries to load s1 first. If it returns null, then it reads the tld file s2. It shows that the leading '/' represent the webapp dir. If it is relative (i.e. no '/'), it refers to the /WEB-INF as you can see the program automatically add it in the beginning. Finally, the message "loader MyChartTag" shows that it loads my tag class successfully.
----Case 1: this should be the normal/ideal case, but in fact it fails.
----It loads the tld file but it is not a class, so throws the error.
JspDirectiveTaglib:uri(s1)=[WEB-INF/chartlib.tld]
JspDirectiveTaglib:s3=[WEB-INF/chartlib.tld]
JspDirectiveTaglib:loadClass(s1)=[WEB-INF/chartlib.tld]
log1: loader: /WEB-INF/chartlib.tld
log9: JspServlet: unable to dispatch to requested page: java.lang.NoClassDefFoundError:
Illegal name: /WEB-INF/chartlib.tld
----Case 2: try to read tld in root dir.
JspDirectiveTaglib:uri(s1)=[chartlib-01.tld]
JspDirectiveTaglib:s3=[chartlib.tld]
JspDirectiveTaglib:loadClass(s1)=[chartlib-01.tld]
JspDirectiveTaglib:class1=null
log9: JspServlet: unable to dispatch to requested page: oracle.jsp.parse.JspParseException:
Error: java.io.FileNotFoundException:
F:\webapp\chartlib.tld (???????????)
----Case 3: try to read a non-existing tld to see where is the root dir.
JspDirectiveTaglib:uri(s1)=[chartlib-02.tld]
JspDirectiveTaglib:s3=[no_chartlib.tld]
JspDirectiveTaglib:loadClass(s1)=[chartlib-02.tld]
JspDirectiveTaglib:class1=null
log9: JspServlet: unable to dispatch to requested page: oracle.jsp.parse.JspParseException:
Error: java.io.FileNotFoundException:
F:\webapp\no_chartlib.tld (???????????)
----Case 4: try to read tld in absolute dir.
JspDirectiveTaglib:uri(s1)=[chartlib-03.tld]
JspDirectiveTaglib:s3=[WEB-INF/chartlib.tld]
JspDirectiveTaglib:loadClass(s1)=[chartlib-03.tld]
JspDirectiveTaglib:class1=null
log1: loader: MyChartTag
----Case 5: try to read tld in relative dir, but the path is changed by the program.
JspDirectiveTaglib:uri(s1)=[chartlib-04.tld]
JspDirectiveTaglib:s3=[WEB-INF/chartlib.tld]
JspDirectiveTaglib:loadClass(s1)=[chartlib-04.tld]
JspDirectiveTaglib:class1=null
log1: loader: MyChartTag
----Case 6: try to read a non-existing tld in relative dir, but the path is changed by the program.
JspDirectiveTaglib:uri(s1)=[chartlib-05.tld]
JspDirectiveTaglib:s3=[WEB-INF/no_chartlib.tld]
JspDirectiveTaglib:loadClass(s1)=[chartlib-05.tld]
JspDirectiveTaglib:class1=null
log9: JspServlet: unable to dispatch to requested page: oracle.jsp.parse.JspParseException:
Error: java.io.FileNotFoundException:
F:\webapp\WEB-INF\no_chartlib.tld (???????????)
----Case 7: try to compare to case 1 if the uri specifies an invalid path.
JspDirectiveTaglib:uri(s1)=[WEB/chartlib.tld]
JspDirectiveTaglib:s3=[WEB-INF/chartlib.tld]
JspDirectiveTaglib:loadClass(s1)=[WEB/chartlib.tld]
JspDirectiveTaglib:class1=null
log1: loader: MyChartTag

Jdev 10.1.2 problem define jstl tagLib

hi,
i have a problem in my jsp when i compile it with JDev 10.1.2, when trying to use JSTL tag:
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
I always get the following message:
Error(3,49): Attribute 'xmlns' used but not declared.
Error(4,58): Attribute 'xmlns:xsi' used but not declared.
Error(5,105): Attribute 'xsi:schemaLocation' used but not declared.
Error(6,18): Attribute 'version' used but not declared.
Error(33,19): Invalid element 'context-param' in content of 'web-app', expected elements '[resource-ref, security-constraint, login-config, security-role, env-entry, ejb-ref, ejb-local-ref]'.
Error(34,18): Invalid element 'description' in content of 'context-param', expected elements '[param-name]'.
but i saw this tutorial http://www.oracle.com/technology/products/jdev/tips/schalk/taglibs/taglibs.html
and i check my preferences about my projet, i had the libraries standart.jar and jstl.jar to my project (Project Properties->Profile->developement->Libraries), and they are located in my <project>/public_html/WEB-INF/lib/
And for the declaration of the taglib,
Tools->Manage Libraries-> JSP TagLibraries the prefix "c" is defined, and it is the same uri what i'm using in my jsp.
I make another with jdev 10.1.3, and i put my project, i compile and it work very fine.
Thanks for any help.
Regis.

Hi this is my Web.xml
I do not have a DTD with the web.xml
<?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">
<display-name>jGallery</display-name>
<context-param>
     <param-name>useDataBase</param-name>
     <param-value>false</param-value>
</context-param>
<context-param>
     <param-name>dataSource</param-name>
     <param-value>java:comp/env/jdbc/jGallery</param-value>
</context-param>
<context-param>
     <param-name>thumbnailWriter</param-name>
     <param-value>de.jwi.jgallery.toolkit.ToolkitThumbnailWriter</param-value>
</context-param>
<resource-ref>
<description>DB Connection</description>
<res-ref-name>jdbc/jGallery</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
<context-param>
     <description>separate with commas</description>
     <param-name>dirmappings</param-name>
          <param-value>/=D:/temp/jg</param-value>
</context-param>
<servlet>
<servlet-name>Controller</servlet-name>
<servlet-class>de.jwi.jgallery.servlets.Controller</servlet-class>
     <init-param>
          <description>Path prefix, that maps to web ressources</description>
          <param-name>webprefix</param-name>
          <param-value>/web/</param-value>
     </init-param>
</servlet>
<servlet>
<servlet-name>StatisticsController</servlet-name>
<servlet-class>de.jwi.jgallery.servlets.StatisticsController</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Controller</servlet-name>
          <url-pattern>*.html</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>StatisticsController</servlet-name>
     <url-pattern>/Statistics/*</url-pattern>
</servlet-mapping>

<welcome-file-list>
     <welcome-file>jGallery.htm</welcome-file>
</welcome-file-list>
<jsp-config>
<taglib>
<taglib-uri> http://www.jwi.de/jGallery/taglib </taglib-uri>
<taglib-location> /WEB-INF/jGallery.tld </taglib-location>
</taglib>
</jsp-config>
</web-app>
I'm not using the JSTL 1.1, in the "management libraries"
i define a JSTL librarie and the version is 1.0.

Taglib uri problem

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