Question

In this
tutorial written how to create REST service and how to consume it. I confused by consuming example. There we need to have on client side jersey.jar and write like this:

Client client = Client.create(config);
WebResource service = client.resource(getBaseURI());

Why client need to know how web-service implemented(jersey or may be ohter implementation)? Why client side don’t consume it by using simple InputStream?

Answer 1

In this particular tutorial you are using the jersey CLIENT to interact with a RESTful Service.

You could also just interact with the service directly by just manually creating an HTTP request and receiving the response and parsing accordingly(http://docs.oracle.com/javase/tutorial/networking/urls/readingWriting.html).

The Jersey client is ultimately is just an abstraction of this to make it easier to work with.