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can't run jstl in jsp

 
Angela lewis
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I am trying to use jstl in my jsp page but its giving hte following error.



i have copied jstl.jar in my webapps lib directory.
Here is my jsp file


here is my servlet


thanks
 
Angela lewis
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here is my web.xml


[ October 27, 2004: Message edited by: Angela lewis ]

There is no tld file in jstl.jar
[ October 27, 2004: Message edited by: Angela lewis ]
 
Nitish Bahadur
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This might help http://java.about.com/library/weekly/aa_jstl_intro_2.htm
 
Angela lewis
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Originally posted by Nitish Bahadur:
This might help http://java.about.com/library/weekly/aa_jstl_intro_2.htm



It has mentioned anything abt changes to be made in web.xml. If i don't make any changes in web.xml still get the same error.
Surprisingly there's no mention of changes of changes in wex.xml for using jstl in HF Servlets and JSP.
Is it needed or not?
 
Angela lewis
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I hadn't copied standard.jar in teh lib. i did that and now i am getting the follwoing error


javax.servlet.ServletException: javax.servlet.jsp.tagext.TagAttributeInfo.<init>(Ljava/lang/String;ZLjava/lang/String;ZZ)V
 
Angela lewis
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java.lang.NoSuchMethodError: javax.servlet.jsp.tagext.TagAttributeInfo.<init>(Ljava/lang/String;ZLjava/lang/String;ZZ)V
 
Jessica White
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Angela:

I am not sure what problem is in your code.
But having both jstl.jar and standar.jar in WEB-INF\lib directory of your web app should make JSTL work.

Here is what I tried, just one JSP with scriptlet, and it works.(I did not put anything in my web.xml about JSTL)

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html><body>
<strong> Movie List: </strong>
<br><br>

<% String[] movieList={"Lion King", "Harry Potter", "Hero"};
request.setAttribute("movieList", movieList); %>

<table>
<c:forEach var="movie" items="${movieList}" >
<tr>
<td>${movie}</td>
</tr>
</c:forEach>
</table>

</body></html>

You can try this to see if it works.
 
Jessica White
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Angela:

It looks like you need to remove whatever you add to web.xml to declare the tld since that is not necessary. (see HFS page 475 for explanation)

Secondly, look at your html code, you mistyped closing tag to be <c:forEach> instead of </c:forEach>

--Jessica
 
Angela lewis
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Originally posted by Jessica White:
Angela:

It looks like you need to remove whatever you add to web.xml to declare the tld since that is not necessary. (see HFS page 475 for explanation)

Secondly, look at your html code, you mistyped closing tag to be <c:forEach> instead of </c:forEach>

--Jessica



Thanks jessica for replying.
I have corrected the <c:forEach> tag. Deleted the entry from web.xml and tried using your example but still getting this error

javax.servlet.ServletException: javax.servlet.jsp.tagext.TagAttributeInfo.<init>(Ljava/lang/String;ZLjava/lang/String;ZZ)V
 
Angela lewis
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I think there is some other problem.
None of the build in JSP 2.0 examples under jsp-examples directory are running. But JSP 1.2 examples are running fine.
please tell me what could be the problem.
 
Angela lewis
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This is what i got when i tried to execute one the inbuild JSP2.0 examples under jsp-examples

java.lang.NoSuchMethodError: javax.servlet.jsp.PageContext.getVariableResolver()Ljavax/servlet/jsp/el/VariableResolver;
 
Nitish Bahadur
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Curiosity, what version of Tomcat are you running?
 
Colin Fletcher
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You will need both jstl.jar and standard.jar and need Tomcat 5.x

SCJP 1.4 SCWCD 1.4

 
Angela lewis
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Originally posted by Colin Fletcher:
You will need both jstl.jar and standard.jar and need Tomcat 5.x



I am using Tomcat 5.0 and I am only trying to run the inbuild examples under jsp-examples (both the jar files are available there) at this url

http://localhost:8080/jsp-examples
 
Angela lewis
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Originally posted by Nitish Bahadur:
Curiosity, what version of Tomcat are you running?



Only Tomcat 5 has inbuild jstl examples under jsp-examples. Had it been an earlier version there wouldn't have been inbuild jstl examples. I tried making my own jsp pages using jstl but there is the same error as there is while executing inbuild jstl examples.
 
Angela lewis
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I have uninstalled and reinstalled tomcat a number of times. Even tried using the beta version jakarta-tomcat-5.0.29 but no use. Same error everywhere.
Did it on another machine also but same problem there. I wonder why no one else faced this problem.
 
Angela lewis
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this is the exact error i get

exception

javax.servlet.ServletException: Error instantiating servlet class org.apache.jsp.jsp2.tagfiles.hello_jsp
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
java.lang.Thread.run(Thread.java:536)


root cause

java.lang.VerifyError: (class: org/apache/jsp/jsp2/tagfiles/hello_jsp, method: _jspx_meth_tags_helloWorld_0 signature: (Ljavax/servlet/jsp/PageContext Z) Incompatible argument to function
java.lang.Class.getDeclaredConstructors0(Native Method)
java.lang.Class.privateGetDeclaredConstructors(Class.java:1590)
java.lang.Class.getConstructor0(Class.java:1762)
java.lang.Class.newInstance0(Class.java:276)
java.lang.Class.newInstance(Class.java:259)
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
java.lang.Thread.run(Thread.java:536)


note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.

 
Nitish Bahadur
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What is your JAVA_HOME set to? Can you please tell us the java version Tomcat is using?
 
Colin Fletcher
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Angela,

I am using Tomcat 5.0.29 with JDK 1.4.2 and works for me... I agree with the last post. I would double check your Java version....

SCJP 1.4 SCWCD 1.4

 
Angela lewis
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the problem was jbuilder8. There must be some old binaries which were conflicitng with new JSP2,0 binaries. I uninstalled Jbuilder is its working fine now
thanks everyone
 
Mili
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Hi..Even I am facing the same problem...JSP 2.0 examples are not working on my system but JSP1.2 examples are.Moreover,if I use formbean in struts it gives me the same error..Can anyone help..ITS URGENT...
 
Ales Justin
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I'm using IntelliJ IDEA and had the same problems.
I was switching project settings a lot and at one time it stopped working.
I then created new project space from scratch and it worked normally again.
 
Dale Seng
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If you are getting the wrong method signature exception on TagAttributeInfo
it means you have got down-level javax.servet code. You might consider
a "nuke and pave" reinstall (just get the latest from the Sun site). But
if you're like me, you have some other environment (for me it was JBoss).

I was able to find that the
TagAttributeInfo class resides in jsp-api.jar (that comes with the
JBoss install) as well as j2ee.jar, that comes with Sun's j2ee.

The solution was to jar-up only the javax.servlet classes from j2ee.jar,
and put that subset jar in the JBOSS_HOME environment variable. Works like
a charm now. Google drs.usenet and TagAttributeInfo for details.

--Dale--
[ November 26, 2004: Message edited by: Dale Seng ]
 
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