RESTful en Spring Boot
Las anotaciones pricipales en Spring Boot son:
@Entity para las clases entidad, que seran propagadas a la base de datos. Generalmente una entidad corresponde a una tabla de la base de datos. @RestController establece una clase como REST API. Es la combinación de @Controller y @ResponseBody. @GetMapping para manejar peticiones GET, funciona como un atajo de @RequestMapping.
@Entity
public class Dog {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private String name;
private String breed;
private String origin;
public Dog(Long id, String name, String breed, String origin) {
this.id = id;
this.name = name;
this.breed = breed;
this.origin = origin;
}
public Dog(String name, String breed) {
this.name = name;
this.breed = breed;
}
public Dog() {}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getBreed() {
return breed;
}
public void setBreed(String breed) {
this.breed = breed;
}
public String getOrigin() {
return origin;
}
public void setOrigin(String origin) {
this.origin = origin;
}
}
DogRepository.java
public interface DogRepository extends CrudRepository {
@Query("select d.id, d.breed from Dog d where d.id=:id")
String findBreedById(Long id);
@Query("select d.id, d.breed from Dog d")
List findAllBreed();
@Query("select d.id, d.name from Dog d")
List findAllName();
}
DogNotFoundException.java
import org.springframework.http.HttpStatus;
import org.springframework.web.bind.annotation.ResponseStatus;
@ResponseStatus(code = HttpStatus.NOT_FOUND, reason = "Dog not found")
public class DogNotFoundException extends RuntimeException {
public DogNotFoundException() {
}
public DogNotFoundException(String message) {
super(message);
}
}
DogService.java
public interface DogService {
List retrieveDogs();
List retrieveDogBreed();
String retrieveDogBreedById(Long id);
List retrieveDogNames();
}
DogServiceImpl.java
@Service
public class DogServiceImpl implements DogService {
@Autowired
DogRepository dogRepository;
public List retrieveDogs() {
return (List) dogRepository.findAll();
}
public List retrieveDogBreed() {
return (List) dogRepository.findAllBreed();
}
public String retrieveDogBreedById(Long id) {
Optional optionalBreed = Optional.ofNullable(dogRepository.findBreedById(id));
String breed = optionalBreed.orElseThrow(DogNotFoundException::new);
return breed;
}
public List retrieveDogNames() {
return (List) dogRepository.findAllName();
}
}
DogController.java
@RestController
public class DogController {
private DogService dogService;
@Autowired
public void setDogService(DogService dogService) {
this.dogService = dogService;
}
@GetMapping("/dogs")
public ResponseEntity> getAllDogs() {
List list = dogService.retrieveDogs();
return new ResponseEntity>(list, HttpStatus.OK);
}
@GetMapping("/dogs/breed")
public ResponseEntity> getDogBreeds() {
List list = dogService.retrieveDogBreed();
return new ResponseEntity>(list, HttpStatus.OK);
}
@GetMapping("/{id}/breed")
public ResponseEntity getBreedByID(@PathVariable Long id) {
String breed = dogService.retrieveDogBreedById(id);
return new ResponseEntity(breed, HttpStatus.OK);
}
@GetMapping("/dogs/name")
public ResponseEntity> getDogNames() {
List list = dogService.retrieveDogNames();
return new ResponseEntity>(list, HttpStatus.OK);
}
}
Comentarios
Publicar un comentario