JAX-RS — Java API for RESTful Web Services

JAX-RS Annotations

@Path("/users")
@Produces(MediaType.APPLICATION_JSON)
public class UserResource {
    @GET
    @Path("/{id}")
    public Response getUser(@PathParam("id") Long id) {
        User user = userService.find(id);
        return Response.ok(user).build();
    }

    @POST
    @Consumes(MediaType.APPLICATION_JSON)
    public Response create(User user) {
        User saved = userService.save(user);
        return Response.status(201).entity(saved).build();
    }
}