Exception in thread “main” javax.xml.bind.PropertyException: name: eclipselink.media-type value: application/json

Question

I\'m attempting to follow the example located here but get an javax.xml.bind.PropertyException. I receive this exception because of the following line of code:

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Answer 1

You need to have the EclipseLink jars (2.4.0 or newer) on your class path, and a jaxb.properties file in the same package as the classes used to bootstrap theJAXBContext with the following entry:

javax.xml.bind.context.factory=org.eclipse.persistence.jaxb.JAXBContextFactory

Below is a link to an example on GitHub that you can run to see everything working:

• https://github.com/bdoughan/blog20110819

Answer 2

If you don't want to add a jaxb.properties file, you can do this all in Java code. This is especially helpful for legacy systems where you don't want to risk affecting the classpath by introducing a new jaxb.properties file.

import org.eclipse.persistence.jaxb.JAXBContextFactory;
import org.eclipse.persistence.jaxb.JAXBContextProperties;
import org.eclipse.persistence.jaxb.xmlmodel.ObjectFactory;

//Set the various properties you want
Map<String, Object> properties = new HashMap<>();
properties.put(JAXBContextProperties.MEDIA_TYPE, "application/json");
properties.put(JAXBContextProperties.JSON_INCLUDE_ROOT, false);

//Create a Context using the properties
JAXBContext jaxbContext = 
    JAXBContextFactory.createContext(new Class[]  {
       MyClass.class,    ObjectFactory.class}, properties);
Marshaller jaxbMarshaller = jaxbContext.createMarshaller();

//Marshall the object
StringWriter stringWriter = new StringWriter();
jaxbMarshaller.marshal(myObject, stringWriter);
String json = stringWriter.toString();

Answer 3

To my main method I added (you could also use -D):

System.setProperty("javax.xml.bind.context.factory","org.eclipse.persistence.jaxb.JAXBContextFactory");