RESTful uri mapping issue

I am doing practice REST web service with Jersey 2.x. The code looks like this:

The context root is jerseyws.

@ApplicationPath("/services")
public class ShoppingApplication extends Application {
    .....
}
@Path("/customers")
public class CustomerResource {
    @GET
    @Path("{id}")
    @Produces("application/xml")
    public StreamingOutput getCustomer(@PathParam("id") int id) {
        ....
    }
...
}

and the URI is http://localhost:8080/jerseyws/services/customers/1 But, I received an 404 not found error. Please tell me where is the problem and thank you very much!