Best way to write a jSON API on Google App Engine

Question

I'd like to create a Java web application on top of Google AppEngine.

What is the best way to develop a REST jSON API?

Do I have to write from scratch a servlet that manages the jSON handling or there is a library or something like the SOAP support for web services?

Answer 1

No need to write a servlet from scratch, use JAX RS, it is easy and simple http://tugdualgrall.blogspot.com/2010/02/create-and-deploy-jax-rs-rest-service.html

Answer 2

Try RESTEasy. It has superb docs and there nice examples to be found. It integrates with Jackson which is IMO the best JSON lib for java.

Answer 3

If you use jersey then you should have a look at Genson http://owlike.github.io/genson/. It is a full databinding+streaming java<>json library. And as a bonus with jersey you only need to have genson in your classpath and voila! Everything shall work without any configuration.

Answer 4

the answer here might be what you're looking for. (Gson should be able to both generate and parse JSON)

Answer 5

After some research I think that using jersey is a good