Karen,
On 3/1/23 09:09, Karen Goh wrote:
Hello experts,
I need desperate help to fix this java.lang.ClassNotFoundException:
jakarta.servlet.jsp.JspFactory
Here are my dependencies which I have installed but still Tomcat will still
purge out the ClassNotFound error :
<dependencies>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.13.3</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.squareup.retrofit2/retrofit
-->
<dependency>
<groupId>com.squareup.retrofit2</groupId>
<artifactId>retrofit</artifactId>
<version>2.9.0</version>
</dependency>
<dependency>
<groupId>com.squareup.retrofit2</groupId>
<artifactId>converter-gson</artifactId>
<version>2.9.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.google.code.gson/gson -->
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.10.1</version>
</dependency>
<!--
https://mvnrepository.com/artifact/jakarta.servlet.jsp.jstl/jakarta.servlet.jsp.jstl-api
-->
<dependency>
<groupId>jakarta.servlet.jsp.jstl</groupId>
<artifactId>jakarta.servlet.jsp.jstl-api</artifactId>
<version>3.0.0</version>
<scope>provided</scope>
</dependency>
<!--
https://mvnrepository.com/artifact/jakarta.platform/jakarta.jakartaee-web-api -->
<dependency>
<groupId>jakarta.platform</groupId>
<artifactId>jakarta.jakartaee-web-api</artifactId>
<version>10.0.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>jakarta.servlet</groupId>
<artifactId>jakarta.servlet-api</artifactId>
<version>6.0.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.glassfish.web</groupId>
<artifactId>jakarta.servlet.jsp.jstl</artifactId>
<version>3.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>jakarta.el</groupId>
<artifactId>jakarta.el-api</artifactId>
<version>5.0.0</version>
<scope>provided</scope>
</dependency>
I have even attached the jar - jakarta.servlet.jsp.jstl-3.0.1.jar
jakarta.servlet.jsp.jstl-api-3.0.0.jarto the lib folder.
Java 17, Eclipse on Windows 10.
I am not sure how to tackle this problem, as I need to get an assignment
done.Would appreciate advice from this group.Tks.
Your POM shows both jstl artifacts as "provided" meaning they won't be
downloaded and bundled into your application. I think you actually need
to allow those to be downloaded as they are not provided by Tomcat (I
think! I'm no JSTL expert).
But Tomcat definitely ships with a copy of
jakarta.servlet.jsp.JspFactory so if you are adding a JAR which contains
that class, you are likely causing a conflict.
Tomcat really should be prohibiting that class from being provided by an
application, but maybe you have put it somewhere that is confusing the JVM.
Which lib/ folder did you put those JARs into?
-chris
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