How do I get Json generated by MOXy to understand when model are numbers

问题

To solve another problem I have moved from using Jersey to EclipseLink MOXy to generate JSON from a JAXB created object model ( created by Sun JAXB 2.1.12). One difference I've noticed is that in the object model numeric attribute are defined as

@XmlSchemaType(name = "nonNegativeInteger")
protected BigInteger count;

Jersey converts to

"count":1,

but MOXy gives

"count" : "1",

How can I get MOXy to realize its a numeric field and not quote it.

回答1:

UPDATE

A fix has been checked into the EclipseLink 2.4.1 and 2.5.0 streams. You can download a nightly label containing this fix starting July 13, 2012 from the following link:

http://www.eclipse.org/eclipselink/downloads/nightly.php

EclipseLink JAXB (MOXy) will marshal numeric types to JSON without quotes. In this case the presence of @XmlSchemaType annotation is causing a problem. This is a bug and you can use the following link to track our progress on this issue:

http://bugs.eclipse.org/384919

WORKAROUND

MOXy's external mapping document can be used to override mappings at the field/property level. We will leverage this to remap the count property to remove the problematic @XmlSchemaType annotation.

oxm.xml

<?xml version="1.0"?>
<xml-bindings
    xmlns="http://www.eclipse.org/eclipselink/xsds/persistence/oxm"
    package-name="forum11448966">
    <java-types>
        <java-type name="Root">
            <java-attributes>
                <xml-element java-attribute="count"/>
            </java-attributes>
        </java-type>
    </java-types>
</xml-bindings>

Root

package forum11448966;

import java.math.BigInteger;

import javax.xml.bind.annotation.*;

@XmlAccessorType(XmlAccessType.FIELD)
public class Root {

    @XmlSchemaType(name = "nonNegativeInteger")
    protected BigInteger count;

}

jaxb.properties

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

Demo

package forum11448966;

import java.math.BigInteger;
import java.util.*;
import javax.xml.bind.*;
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>(3);
        properties.put(JAXBContextProperties.OXM_METADATA_SOURCE, "forum11448966/oxm.xml");
        properties.put(JAXBContextProperties.MEDIA_TYPE, "application/json");
        properties.put(JAXBContextProperties.JSON_INCLUDE_ROOT, false);
        JAXBContext jc = JAXBContext.newInstance(new Class[] {Root.class}, properties);

        Root root = new Root();
        root.count = BigInteger.TEN;

        Marshaller marshaller = jc.createMarshaller();
        marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
        marshaller.marshal(root, System.out);
    }

}

Output

{
   "count" : 10
}

来源：https://stackoverflow.com/questions/11448966/how-do-i-get-json-generated-by-moxy-to-understand-when-model-are-numbers

标签

json

jaxb

jersey

moxy