Step by Step example to build REST Service with JAX-RS

REST service with Java JAX-RS step by step:

  1. Include following to two mapping in your web.xml
    2.  
<servlet>
    <servlet-name>javax.ws.rs.core.Application</servlet-name>
    <load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
    <servlet-name>javax.ws.rs.core.Application</servlet-name>
    <url-pattern>/yourAppURL/*</url-pattern>
</servlet-mapping>
  2. Create a class for REST Service. The @PATH annotation must be defined at the class level not at the method level.
    3. /**
* @author shirish
* @Jul 11, 2016
*
*/
@Path("/hello")
public class HelloWorldClass {

/**
*
*/
public HelloWorldClass() {

  }

@GET
@Produces("text/plain")
public String getClichedMessage() {

    return "Hello World";
  }
}
  3. Classpath in the war.  –

    4. The easiest way to get war working in a java web container is to put all application classes in “yourWebApp/WEB-INF/classes” such that you do not need to fix your application classpath to include jars.

    Note: even if you put your application jars in “yourWebApp/WEB-INF/lib”, the jars may not be in classpath properly; therefore, may not have the classes loaded that are necessary.

  4. Build and Deploy in JETTY or any application server.
  5. path to get to your REST service
    6.     http://localhost:8080/yourapp/yourAppURL/hello

Reference: