Java EE 8 Cookbook

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As you can see, JAX-RS eases a lot of the objects parsing and represention:

    @GET    @Path("getUserFromBean")    @Produces(MediaType.APPLICATION_JSON)    public Response getUserFromBean(){        userFromBean = userBean.getUser();        return Response.ok(userFromBean).build();    }    @GET    @Path("getUserFromLocal")    @Produces(MediaType.APPLICATION_JSON)    public Response getUserFromLocal(){        return Response.ok(userLocal).build();    }

By using a Response returning object and @Produces(MediaType.APPLICATION_JSON), you give the framework the hard job of parsing your user object to a JSON representation. Lots of effort saved in a few lines!

You could also inject the user using a producer (the @Produces annotation). Check the CDI recipe from Chapter 1, New Features ...