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What is the difference between JAX-RS and JAX-WS?

JAX-WS , a Java API for the XML-Based Web Services, provided a standard way to develop a Web Services in SOAP (Simple Object Access Protocol) notation.

In JAX-WS, Web Services are called/invoked through remote procedure calls. SOAP protocol is used to exchange of information between the client and the Web Service. Message exchange between the client and the server performed through XML based SOAP messages.

Clients of the JAX-WS Web Service need a WSDL file to generate executable code that the clients can use to call Web Service.

JAX-RS is a Java API for RESTful Web Services. RESTful Web Services are represented as resources and can be identified by Uniform Resource Identifiers (URI). Remote procedure call in this case is represented a HTTP- request and the necessary data is passed as parameters of the query. REST Web Services are more flexible, can use several different MIME- types. Typically used for XML data exchange or JSON (JavaScript Object Notation) data exchange.

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