如何将@Projection分配给@GetMapping spring servlet端点？

Question

I have an @Entity Person class, and want to expose that via a webservice. There should be a method just exposing all details, and and endpoint only exposing a view excerpt.

Can I use Spring @Projection for that purpose without having to manually extract the fields I want to expose? I'd prefer just returning a List<Person> but render only certain details for certain endpoints.

@RestController
public class BookingInfoServlet {
    @Autowired
    private PersonRepository dao;

    @GetMapping("/persons")
    public List<Person> persons() {
        return dao.findAll();
    }

    //TODO how can I assign the Projection here?
    @GetMapping("/personsView")
    public List<Person> persons() {
        return dao.findAll();
    }

    //only expose certain properties
    @Projection(types = Person.class)
    public interface PersonView {
        String getLastname();
    }
}

@Entity
public class Person {
    @id
    long id;

    String firstname, lastname, age, etc;
}

interface PersonRepository extends CrudRepository<Person, Long> {
}

Answer 1

Note that @Projection only works with spring data rest. I believe you could try this:

@Projection(name = "personView",  types = Person.class)
public interface PersonView {
    String getLastname();
}

And on your repo, you need something like this:

@RepositoryRestResource(excerptProjection = PersonView.class)
interface PersonRepository extends CrudRepository<Person, Long> {
}