How to serialize java object as xml attribute with jackson?

Question

is there a way to serialize a java var (e.g. int) via jackson as an xml attribute? I can not find any spezific jackson or json annotation (@XmlAttribute @javax.xml.bind.anno

Answer 1

Okay I found a solution.

It wasn't necessary to register an AnnotaionIntrospector if you use jackson-dataformat-xml

File file = new File("PointTest.xml");
XmlMapper xmlMapper = new XmlMapper();
xmlMapper.writeValue(file, new Point(100, 100, 100));

The missing TAG was

@JacksonXmlProperty(isAttribute=true)

so just change the getter to:

@JacksonXmlProperty(isAttribute=true)
public int getX() {
    return x;
}

and it works fine. Just follow this how to:

https://github.com/FasterXML/jackson-dataformat-xml

@JacksonXmlProperty allows specifying XML namespace and local name for a property; as well as whether property is to be written as an XML element or attribute.

Answer 2

Have you registered JaxbAnnotationIntrospector?

ObjectMapper mapper = new ObjectMapper();
AnnotationIntrospector introspector = new JaxbAnnotationIntrospector();
// make deserializer use JAXB annotations (only)
mapper.getDeserializationConfig().setAnnotationIntrospector(introspector);
// make serializer use JAXB annotations (only)
mapper.getSerializationConfig().setAnnotationIntrospector(introspector);