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Generate Java classes from a XML file

Posted by: admin October 22, 2018 Leave a comment


I’m doing a program to convert XML to Java. However I have encountered issues with the code portion that follows, especially with what’s inside the “Trias” and with the “siri:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Trias xmlns:siri="http://www.siri.org.uk/siri" xmlns="http://www.vdv.de/trias" xmlns:ns3="http://www.ifopt.org.uk/acsb" xmlns:ns4="http://www.ifopt.org.uk/ifopt" xmlns:ns5="http://datex2.eu/schema/1_0/1_0" version="1.2">

When I test the console sends:

javax.xml.bind.UnmarshalException: unexpected element
(uri:”http://www.vdv.de/trias“, local:”Trias”). Expected elements are


rg.apache.catalina.core.StandardWrapperValve invoke SEVERE:
Servlet.service() for servlet
[pt.thales.attracktive.communication.MobilepTT] in context with path
[/mobileptt] threw exception java.lang.NullPointerException

I’m using JAXB. If I remove what’s inside the “Trias” and the “siri:” it works fine thanks to:

    public Trias testXmlToObject(InputStream line)  {
        try {

            JAXBContext jaxbContext = JAXBContext.newInstance(Trias.class);
            Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();
            Trias mobilepTT = (Trias) jaxbUnmarshaller.unmarshal(line);
        } catch (JAXBException e) {
        return null;

Do you know what’s the issue?

When this problem is solved my goal is to generate Java objects from the XML. I started doing it starting by converting the XML to the XSD and using the command line xjc but I wish to program that.