client jar for rest webservice

[Walter Andresen]

Hi there!
I have a restful service that returns JSON. Is there anyway to generate a client jar and give it to clients who invokes it?
For example, when I use AWS, they provide a client jar, so you don't need to contruct JSON manually, you just invoke API to save something to S3, for example.
I want to generate a similar client jar for my own web service. Just wanted to see if it is possible...

Thank you

[Walter Andresen]

I use JAX-RS and Spring.