CODEWITHSUNDEEP
javajerseycxfjax-rs
AndyB
AndyB

Reputation: 1946

Is Jersey just a framework for developing RESTful web services in Java?

The way I understand it is Java EE 6 includes the classes for java.ws.rs (JAX-RS) which are defined in the JSR 311 spec document. But I don't know why you would use Jersey or Apache CXF if the base classes are already built into Java EE 6. Can you not create a RESTful web service with those classes alone? Are Jersey, Apache CXF, etc just frameworks to make development of REST-based web services easier?

Upvotes: 13

Views: 7869

Answers (2)

Michael Borgwardt
Michael Borgwardt

Reputation: 346260

why you would use Jersey or Apache CXF if the base classes are already built into Java EE 6. Can you not create a RESTful web service with those classes alone?

Java EE only defines standards, those classes are the standard API, but there is no implementation behind them. Jersey and CXF are competing implementations of the standard.

However, if you have a server that claims to support Java EE 6, it will have to contain an implementation for every API that's in the standard. For example, Glassfish includes Jersey, so you don't have to add it explicitly.

Upvotes: 17

Matt Ball
Matt Ball

Reputation: 359776

JAX-RS is just a specification. In order to use JAX-RS, you need an implementation of the spec.

Jersey is a JAX-RS implementation. Specifically, it is the reference implementation.

Upvotes: 8

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