Question

The JSON is:

{"list": [1,2,3,4,5,6,7,8,9,10]}

Here’s how I implement the JAXB bean:

package com.anon.sortweb.jaxb;

import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlElement;

@XmlRootElement
public class JsonBean {
    @XmlElement(name="list")
    private int[] list;

    public JsonBean() {}

    public void setList(int[] list) {
        this.list = list;
    }

    public int[] getList() {
        return list;
    }
}

My web application works fine (I’m able to successfully access other resources) but this one resource (that I pass my JSON to) returns a 415 Media Type Unsupported exception.

@POST
@Consumes(MediaType.APPLICATION_JSON)
@Produces("text/html")
public String sortAndReturnHtml(JsonBean listBean) { ... }

How do I correctly write my JAXB bean to encapsulate a list of integers?

Thanks in advance!

Answer 1

Note: I’m the EclipseLink JAXB (MOXy) lead and a member of the JAXB (JSR-222) expert group.

Your JAXB bean is a perfectly reasonable representation of your JSON data. The JAXB (JSR-222) spec does not cover JSON binding so the answer ultimately comes down to how/if your JAX-RS implementation interprets JAXB metadata to produce/consume JSON.

Demo

Below is how it would work with MOXy.

package forum13648734;

import java.util.*;
import javax.xml.bind.*;
import javax.xml.transform.stream.StreamSource;
import org.eclipse.persistence.jaxb.JAXBContextProperties;

public class Demo {

    public static void main(String[] args) throws Exception {
        Map<String, Object> properties = new HashMap<String, Object>(2);
        properties.put(JAXBContextProperties.MEDIA_TYPE, "application/json");
        properties.put(JAXBContextProperties.JSON_INCLUDE_ROOT, false);
        JAXBContext jc = JAXBContext.newInstance(new Class[] {JsonBean.class}, properties);

        Unmarshaller unmarshaller = jc.createUnmarshaller();
        StreamSource json = new StreamSource("src/forum13648734/input.json");
        JsonBean jsonBean = unmarshaller.unmarshal(json, JsonBean.class).getValue();

        Marshaller marshaller = jc.createMarshaller();
        marshaller.marshal(jsonBean, System.out);
    }

}

input.json/Output

{"list":[1,2,3,4,5,6,7,8,9,10]}

For More Information

• http://blog.bdoughan.com/2011/08/json-binding-with-eclipselink-moxy.html
• http://blog.bdoughan.com/2012/05/moxy-as-your-jax-rs-json-provider.html