Implementation of JAXB-API has not been found on module path or classpath.

[yusufdonmez]

I try to use UBL2.1 version.
in test method I got the error when try to create invoice from scratch.

public static void main(String[] args) {
		String sCurrency = "EUR";

		// Create domain object
		InvoiceType aInvoice = new InvoiceType ();
	
		// Fill it
		aInvoice.setID ("Dummy Invoice number");
		aInvoice.setIssueDate (PDTFactory.getCurrentXMLOffsetDateUTC ());
	
		SupplierPartyType aSupplier = new SupplierPartyType ();
		aInvoice.setAccountingSupplierParty (aSupplier);
	
		CustomerPartyType aCustomer = new CustomerPartyType ();
		aInvoice.setAccountingCustomerParty (aCustomer);
	
		MonetaryTotalType aMT = new MonetaryTotalType ();
		aMT.setPayableAmount (BigDecimal.TEN).setCurrencyID (sCurrency);
		aInvoice.setLegalMonetaryTotal (aMT);
	
		InvoiceLineType aLine = new InvoiceLineType ();
		aLine.setID ("1");
	
		ItemType aItem = new ItemType ();
		aLine.setItem (aItem);
	
		aLine.setLineExtensionAmount (BigDecimal.TEN).setCurrencyID (sCurrency);
	
		aInvoice.addInvoiceLine (aLine);
	
		// Add some TaxTotal
		/**
		 * <pre>
		<cac:TaxSubtotal>
		  <cbc:TaxableAmount currencyID="EUR">10.00</cbc:TaxableAmount>
		  <cbc:TaxAmount currencyID="EUR">10.00</cbc:TaxAmount>
		  <cac:TaxCategory>
			<cbc:ID schemeID="UNCL5305" schemeAgencyID="6">Z</cbc:ID>
			<cbc:Percent>10.00</cbc:Percent>
			<cac:TaxScheme>
			  <cbc:ID schemeAgencyID="6" schemeID="UN/ECE 5153">VAT</cbc:ID>
			</cac:TaxScheme>
		  </cac:TaxCategory>
		</cac:TaxSubtotal>
		 * </pre>
		 */
		{
		  final TaxSubtotalType aTaxSubtotal = new TaxSubtotalType ();
		  aTaxSubtotal.setTaxableAmount (BigDecimal.TEN).setCurrencyID (sCurrency);
		  aTaxSubtotal.setTaxAmount (BigDecimal.TEN).setCurrencyID (sCurrency);
	
		  final TaxCategoryType aTaxCategory = new TaxCategoryType ();
		  final IDType aTCID = new IDType ();
		  aTCID.setSchemeID ("UNCL5305");
		  aTCID.setSchemeAgencyID ("6");
		  aTCID.setValue ("Z");
		  aTaxCategory.setID (aTCID);
	
		  aTaxCategory.setPercent (BigDecimal.TEN);
	
		  final TaxSchemeType aTaxScheme = new TaxSchemeType ();
		  final IDType aTSID = new IDType ();
		  aTSID.setSchemeID ("UNCL5305");
		  aTSID.setSchemeAgencyID ("6");
		  aTSID.setValue ("VAT");
		  aTaxScheme.setID (aTSID);
		  aTaxCategory.setTaxScheme (aTaxScheme);
	
		  aTaxSubtotal.setTaxCategory (aTaxCategory);
	
		  final TaxTotalType aTaxTotal = new TaxTotalType ();
		  aTaxTotal.setTaxAmount (BigDecimal.TEN).setCurrencyID (sCurrency);
		  aTaxTotal.addTaxSubtotal (aTaxSubtotal);
		  aInvoice.addTaxTotal (aTaxTotal);
		}
	
		// Write to disk
		UBL21Writer.invoice().write(aInvoice, new File ("target/dummy-invoice.xml"));
	}

pom.xml

<dependencyManagement>
  <dependencies>
    <dependency>
      <groupId>com.helger.ubl</groupId>
      <artifactId>ph-ubl-parent-pom</artifactId>
      <version>6.6.3</version>
      <type>pom</type>
      <scope>import</scope>
    </dependency>
  </dependencies>
</dependencyManagement>
  

  <dependencies>

    <!-- https://mvnrepository.com/artifact/com.sun.xml.bind/jaxb-impl -->
    <dependency>
      <groupId>com.sun.xml.bind</groupId>
      <artifactId>jaxb-impl</artifactId>
      <version>3.0.0</version>
    </dependency>


    <dependency>
      <groupId>com.helger.ubl</groupId>
      <artifactId>ph-ubl21-codelists</artifactId>
      <version>6.6.3</version>
    </dependency>
    <dependency>
      <groupId>com.helger.ubl</groupId>
      <artifactId>ph-ubl21</artifactId>
      <version>6.6.3</version>
    </dependency>

  </dependencies>

Error:

Exception in thread "main" java.lang.IllegalArgumentException: Failed to create JAXB context for package 'oasis.names.specification.ubl.schema.xsd.invoice_21' using ClassLoader jdk.internal.loader.ClassLoaders$AppClassLoader@4459eb14
        at com.helger.jaxb.JAXBContextCacheKey._createFromPackageAndClassLoader(JAXBContextCacheKey.java:165)
        at com.helger.jaxb.JAXBContextCacheKey.createJAXBContext(JAXBContextCacheKey.java:202)
        at com.helger.jaxb.JAXBContextCache.lambda$new$0(JAXBContextCache.java:81)
        at com.helger.commons.cache.MappedCache.getFromCache(MappedCache.java:337)
        at com.helger.jaxb.JAXBContextCache.getFromCache(JAXBContextCache.java:124)
        at com.helger.jaxb.JAXBContextCache.getFromCache(JAXBContextCache.java:166)
        at com.helger.jaxb.builder.AbstractJAXBBuilder.getJAXBContext(AbstractJAXBBuilder.java:164)
        at com.helger.jaxb.builder.AbstractWritingJAXBBuilder.createMarshaller(AbstractWritingJAXBBuilder.java:80)
        at com.helger.jaxb.builder.JAXBWriterBuilder.createMarshaller(JAXBWriterBuilder.java:232)
        at com.helger.jaxb.builder.JAXBWriterBuilder.write(JAXBWriterBuilder.java:298)
        at com.helger.jaxb.IJAXBWriter.write(IJAXBWriter.java:381)
        at com.helger.jaxb.IJAXBWriter.write(IJAXBWriter.java:234)
        at com.helger.jaxb.IJAXBWriter.write(IJAXBWriter.java:195)
        at Test.main(Test.java:98)
Caused by: javax.xml.bind.JAXBException: Implementation of JAXB-API has not been found on module path or classpath.
 - with linked exception:
[java.lang.ClassNotFoundException: com.sun.xml.bind.v2.ContextFactory]
        at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:131)
        at javax.xml.bind.ContextFinder.find(ContextFinder.java:318)
        at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:478)
        at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:435)
        at com.helger.jaxb.JAXBContextCacheKey._createFromPackageAndClassLoader(JAXBContextCacheKey.java:155)
        ... 13 more
Caused by: java.lang.ClassNotFoundException: com.sun.xml.bind.v2.ContextFactory
        at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
        at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
        at javax.xml.bind.ServiceLoaderUtil.nullSafeLoadClass(ServiceLoaderUtil.java:92)
        at javax.xml.bind.ServiceLoaderUtil.safeLoadClass(ServiceLoaderUtil.java:125)
        at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:128)
        ... 17 more

[phax]

Please use JAXB 2.x only.
JAXB 3 requires Java 11 as the basis, but my code uses Java 1.8 for everything.
hth

[yusufdonmez]

Thanks @phax
This solves my issue:

<dependency>
    <groupId>com.sun.xml.bind</groupId>
    <artifactId>jaxb-impl</artifactId>
    <version>2.3.3</version>
</dependency>