JAX-RS stands for Java API for RESTful Web services. They are nothing but a set of Java-based APIs that are provided in the Java EE which is useful in the IMPLEMENTATION and development of RESTful web services.

Features of JAX-RS are:

• POJO-based: The APIs in the JAX-RS is based on a certain set of annotations, classes, and interfaces that are used with POJO (Plain Old Java Object) to expose the services as web services.
• HTTP-based: The JAX-RS APIs are DESIGNED using HTTP as their base protocol. They support the HTTP usage patterns and they provide the CORRESPONDING mapping between the HTTP actions and the API classes.
• Format Independent: They can be used to work with a wide range of data types that are supported by the HTTP body content.
• Container Independent: The APIs can be deployed in the Java EE container or a servlet container such as Tomcat or they can also be plugged into JAX-WS (Java API for XML-based web services) PROVIDERS.