Unable to load class using jstl on Tomcat

D

David Zeidman

I am trying to use the core jstl in a jsp but I get the error message
shown at the end of this message. I am using Win2000 and Tomcat 4.1

The jsp starts off as follows:

<%@page contentType="text/html"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %>

<c:import url="/pageLogger.jsp"/>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

If I remove the import tag then it complains about an if tag lower
down in the jsp so there is something wrong with the loading of the
jstls. I have the c.tld file located in the <my webapp>\WEB-INF
directory. I have the tld defined in my web.xml file as follows:

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

I have the jstl.jar file in the <my webapp>\WEB-INF\LIB directory.

I have my java directory and the java bin directory in my path
statement.

Is there anything else I need to do or look at? Any suggestions would
be great.

Thanks

David

Error message follows:


org.apache.jasper.JasperException: /login.jsp(3,0) Unable to load
class import
at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:94)
at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:428)
at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:219)
at org.apache.jasper.compiler.Parser.parseCustomTag(Parser.java:712)
at org.apache.jasper.compiler.Parser.parseElements(Parser.java:804)
at org.apache.jasper.compiler.Parser.parse(Parser.java:122)
at org.apache.jasper.compiler.ParserController.parse(ParserController.java:199)
at org.apache.jasper.compiler.ParserController.parse(ParserController.java:153)
at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:227)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:369)
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:473)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:190)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2416)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:601)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:392)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:619)
at java.lang.Thread.run(Unknown Source)
 
W

Wendy S

David said:
I am trying to use the core jstl in a jsp but I get the error message
shown at the end of this message. I am using Win2000 and Tomcat 4.1
The jsp starts off as follows:
<%@page contentType="text/html"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %>
<c:import url="/pageLogger.jsp"/>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
If I remove the import tag then it complains about an if tag lower
down in the jsp so there is something wrong with the loading of the
jstls. I have the c.tld file located in the <my webapp>\WEB-INF
directory. I have the tld defined in my web.xml file as follows:
<taglib>
<taglib-uri>http://java.sun.com/jstl/core</taglib-uri>
<taglib-location>/WEB-INF/c.tld</taglib-location>
</taglib>
Click to expand...

You shouldn't need this part. Tomcat will locate the tld in one of the .jar
files.
I have the jstl.jar file in the <my webapp>\WEB-INF\LIB directory.
Click to expand...

should be WEB-INF\lib, although the backwards slashes say you're using
Windows so case may not be an issue.

Are you sure you've got all the .jar files? What about 'standard.jar'? I
have both jstl.jar and standard.jar in my WEB-INF/lib directory with a
working Struts/JSTL webapp.

Another question, whose Standard taglib implementation are you using?
Jakarta's version is good, I have heard of problems with one other
implementation, I think it was Resin's.
 

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