The root-resource classes are Plain Old Java Objects (POJO), which are either annotated with @Path or have at least one method annotated with @Path or a request method designator, such as @GET, @PUT, @POST, or @DELETE. Resource methods are methods of a resource class that are annotated with a request-method designator.
Let's look at the JAX-RS annotations:
@Path("resource_path"):
The
@Pathannotation defines the path to the base URL orresource_path. The base URL is based on the application's name, the servlet, and the URL pattern from theweb.xmlconfiguration file.@PathParam:
The
@PathParamannotation is used to inject values from the URL into a method parameter. In this way, one can inject, say, the ID of a resource into the method for getting the correct object.@GET:
The
@GETannotation indicates that the method will answer to an HTTP GET request.@PUT:
The
@PUTannotation indicates that the method will answer to an HTTP PUT request.@POST: