Marshalling and Unmarshalling JSON Documents

Use the eclipselink.media-type property on your JAXB Marshaller or Unmarsaller to produce and use JSON documents with your application, as shown in Example 10-1.

Example 10-1 Marshalling and Unmarshalling

...
 
Marshaller m = jaxbContext.createMarshaller();
m.setProperty("eclipselink.media-type", "application/json");
 
Unmarshaller u = jaxbContext.createUnmarshaller();
u.setProperty("eclipselink.media-type", "application/json");

...

You can also specify the eclipselink.media-type property in the Map of the properties used when you create the JAXBContext, as shown in Example 10-2.

Example 10-2 Using a Map

import org.eclipse.persistence.jaxb.JAXBContextProperties;
import org.eclipse.persistence.oxm.MediaType;
 
Map<String, Object> properties = new HashMap<String, Object>();
properties.put("eclipselink.media-type", "application/json");
 
JAXBContext ctx = JAXBContext.newInstance(new Class[] { Employee.class }, properties);
Marshaller jsonMarshaller = ctx.createMarshaller();
Unmarshaller jsonUnmarshaller = ctx.createUnmarshaller();

When specified in a Map, the Marshallers and Unmarshallers created from the JAXBContent will automatically use the specified media type.

You can also configure your application to use JSON documents by using the MarshallerProperties, UnmarshallerProperties, and MediaType constants, as shown in Example 10-3.

Example 10-3 Using MarshallerProperties and UnarshallerProperties

import org.eclipse.persistence.jaxb.MarshallerProperties;
import org.eclipse.persistence.jaxb.UnarshallerProperties;
import org.eclipse.persistence.oxm.MediaType;
 
m.setProperty(MarshallerProperties.MEDIA_TYPE, MediaType.APPLICATION_JSON);
u.setProperty(UnmarshallerProperties.MEDIA_TYPE, MediaType.APPLICATION_JSON);
...