Spring 3.x JSON status 406 “characteristics not acceptable according to the request ”accept“ headers ()”

Question

Upon trying to get my response in JSON using Spring 3.x, I get the 406 error \"The resource identified by this request is only capable

Answer 1

Don't make the same mistake I did, spend all day playing around with Spring configuration, when actually your object returned in a web service is not marshaling to XML correctly. It seems Spring catches a JAXB marshaling error and doesn't report it. Use this sandbox code to validate JAXB marshaling:

MyClass myclass = new MyClass();
//populate myclass here

JAXBContext context = JAXBContext.newInstance(MyClass.class);

Marshaller m = context.createMarshaller();
StringWriter w = new StringWriter();

m.marshal(myclass, w);
System.out.println(w);

This produced and displayed an exception. Fixed the cause, and my web service is available in both XML and JSON.