REST API 실습

Person테이블에 데이터를 CRUD하는 API를 작성하였다.

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Person.java

@Setter
@Getter
@NoArgsConstructor
@Entity
public class Person extends Timestamped {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @Column(nullable = false)
    private String name;

    @Column(nullable = false)
    private int age;

    @Column(nullable = false)
    private String job;

    public Person(String name, int age, String job) {
        this.name = name;
        this.age = age;
        this.job = job;
    }

    public Person(PersonRequestDto requestDto){
        this.name=requestDto.getName();
        this.age=requestDto.getAge();
        this.job=requestDto.getJob();
    }

    public void update(PersonRequestDto requestDto) {
        this.name=requestDto.getName();
        this.age=requestDto.getAge();
        this.job=requestDto.getJob();
    }
}

PersonRequestDto.java

@Getter
@Setter
@RequiredArgsConstructor
public class PersonRequestDto {
    private String name;
    private int age;
    private String job;
}

PersonRepository.java

public interface PersonRepository extends JpaRepository<Person, Long> {
}

PersonService.java

@RequiredArgsConstructor
@Service
public class PersonService
{
    private final PersonRepository personRepository;

    @Transactional
    public Long update(Long id, PersonRequestDto requestDto){
        Person person = personRepository.findById(id).orElseThrow(
                ()->new IllegalArgumentException("id not exists")
        );
        person.update(requestDto);
        return person.getId();
    }

}

PersonController.java

@RequiredArgsConstructor
@RestController
public class PersonController {
    private final PersonRepository personRepository;

    private final PersonService personService;

    //GET API
    @GetMapping("/api/persons")
    public List<Person> getPersons(){
        return personRepository.findAll();
    }

    //POST API
    @PostMapping("/api/persons")
    public Person createPerson(@RequestBody PersonRequestDto requestDto){
        Person person = new Person(requestDto);
        return personRepository.save(person);
    }

    //PUT API
    @PutMapping("/api/persons/{id}")
    public Long updatePerson(@PathVariable Long id, @RequestBody PersonRequestDto requestDto){
        return personService.update(id, requestDto);
    }

    //DELETE API
    @DeleteMapping("/api/persons/{id}")
    public Long deletePerson(@PathVariable Long id){
        personRepository.deleteById(id);
        return id;
    }

}