asking for help regarding ClassNotFoundException: PreflightParser

[Szendi, Bence]

Hello,

I would like to ask for your help regarding the following problem I am facing.
I am getting this exception, at runtime: java.lang.ClassNotFoundException: 
org.apache.pdfbox.preflight.parser.PreflightParser
The code is based on Java 8 and runs on a Weblogic 12c, built with maven 3.6.0.

I have the following dependencies in my project:
<!-- https://mvnrepository.com/artifact/org.apache.pdfbox/pdfbox -->
                                <dependency>
                                                
<groupId>org.apache.pdfbox</groupId>
                                                <artifactId>pdfbox</artifactId>
                                                <version>2.0.22</version>
                                                <scope>compile</scope>
                                </dependency>

                                <!-- 
https://mvnrepository.com/artifact/org.apache.pdfbox/preflight -->
                                <dependency>
                                                
<groupId>org.apache.pdfbox</groupId>
                                                
<artifactId>preflight</artifactId>
                                                <version>2.0.22</version>
                                                <scope>compile</scope>
                                </dependency>

                                <!-- 
https://mvnrepository.com/artifact/org.apache.pdfbox/fontbox -->
                                <dependency>
                                                
<groupId>org.apache.pdfbox</groupId>
                                                <artifactId>fontbox</artifactId>
                                                <version>2.0.22</version>
                                                <scope>compile</scope>
                                </dependency>

My code:
import org.apache.pdfbox.preflight.Format;
import org.apache.pdfbox.preflight.PreflightDocument;
import org.apache.pdfbox.preflight.ValidationResult;
import org.apache.pdfbox.preflight.ValidationResult.ValidationError;
import org.apache.pdfbox.preflight.parser.PreflightParser;
...
public void validatePDF(DataHandler pdf) ...
{
...
      PreflightParser parser = new PreflightParser(pdf.getDataSource());
      parser.parse(Format.PDF_A1A);
      PreflightDocument document = parser.getPreflightDocument();
      document.validate();
      ValidationResult result = document.getResult()
...

( The exception is thrown at the line PreflightParser parser = new 
PreflightParser(pdf.getDataSource()); )

Remark: I have added fontbox to the dependencies based on an answer in this 
post: 
https://stackoverflow.com/questions/18503159/getting-java-lang-noclassdeffounderror-org-pdfbox-pdfparser,
 but it did not solve the problem.



Can you help me find the solution?



Thanks in advance and best regards,
Bence Szendi


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