Does Jaxb Support Json

With MOXy as your JAXB provider you can produce/consume JSON using the standard JAXB APIs (available in Java SE 6) without adding any compile time dependencies.

What is the difference between Jackson and JAXB?

JAXB converts XML to java objects, and Jackson converts the same java objects to JSON.

What is the use of JAXB in Web service?

Java Architecture for XML Binding (JAXB) is an XML-to-Java binding technology that simplifies the development of web services by enabling transformations between schema and Java objects and between XML instance documents and Java object instances.