java.lang.ClassNotFoundException: javax.servlet.jsp.jstl.core.Config [duplicate]

Question

When I am run my application after entering the URL, this exception is coming.I am using Eclipse and Tomcat7.0.35. I also added Jstl.jar and jstl1.2.jar

My code is

java.lang.ClassNotFoundException: javax.servlet.jsp.jstl.core.Config
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1714)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
    at org.apache.myfaces.view.jsp.JspViewDeclarationLanguage.buildView(JspViewDeclarationLanguage.java:91)
    at org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:78)
    at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:241)
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:199)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

Alevin

Can you provide the list of the libraries in you classpath? seems you are missing the jstl.jar in your classpath – Falsecard

I added jsf-myfaces,jstl,primefaces libraries in both classpath and buildpath – Alevin

@Sagar You need to ensure that the jars are in the WEB-INF/lib directory. See my answer. – Cunaxa

find the bug-- For some reason jstl jars are removing every time from my eclipse deployment path – Alevin

Answer 1

Download the following jars and add it to your WEB-INF/lib directory:

• jsp-api-2.0.jar
• jstl-1.2.jar

Unworldly

In my case, I only needed to add jstl-1.2.jar. – Wilton

Added and worked for me. – Forgotten

It works!! You can find the jar here: mvnrepository.com/artifact/javax.servlet/jstl/1.2 – Meetinghouse

Answer 2

The error is telling you it cannot find the class because it is not available in your application.

If you are using Maven, make sure you have the dependency for jstl artifact:

<dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
</dependency>

If you are not using it, just make sure you include the JAR in your classpath. See this answer for download links.

Caveat

@RaulGogo-I am not using Maven – Alevin

The last paragraph is for the case in which you don't have Maven. See the answer in the link provided. – Caveat

For anyone else who might have the same issue I did, my mistake was using javax.servlet.jsp.jstl as the groupId instead of javax.servlet – Daisy

Answer 3

By default, Tomcat container doesn’t contain any jstl library. To fix it, declares jstl.jar in your Maven pom.xml file if you are working in Maven project or add it to your application's classpath

<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</version>
  </dependency>

Helve

Answer 4

Probably the jstl libraries are missing from your classpath/not accessible by tomcat.

You need to add at least the following jar files in your WEB-INF/lib directory:

• jsf-impl.jar
• jsf-api.jar
• jstl.jar

Cunaxa

... and do not fiddle with project's Build Path setting. Untouch it and undo if necessary any changes you made there. Just dropping the JAR in /WEB-INF/lib is sufficient. See also stackoverflow.com/tags/jstl/info Note that JSTL 1.2 is only one JAR file, not two. So if you have jstl.jar and jstl-1.2.jar, you should remove the first one. – Icelandic

@Icelandic Good point. Thanks BalusC. – Cunaxa

Answer 5

Add jstl jar to your application classpath.

Selina

Answer 6

Just a quick comment: sometimes Maven does not copy the jstl-.jar to the WEB-INF folder even if the pom.xml has the entry for it.

I had to manually copy the JSTL jar to /WEB-INF/lib on the file system. That resolved the problem. The issue may be related to Maven war packaging plugin.

Substandard

Answer 7

Add JSTL library as dependency to your project (javax.servlet.jsp.jstl.core.Config is a part of this package). For example, if you were using Gradle, you could write in a build.gradle:

dependencies {
    compile 'javax.servlet:jstl:1.2'
}

Kipkipling

Answer 8

I had the same problem. Go to Project Properties -> Deployment Assemplbly and add jstl jar

Brownlee