Breaking News: Grepper is joining You.com. Read the official announcement!

repository in spring boot

Innocent Iguana answered on February 8, 2024 Popularity 8/10 Helpfulness 4/10

answer repository in spring boot

related spring boot repository pattern

repository in spring boot

Comment

public interface RoomRepository extends JpaRepository<Room, Long> {
  List<Room> findAllByRoomNumberIgnoreCase(String roomNumber);
  Optional<Room> findByRoomNumberIgnoreCase(String roomNumber);
  // findAllBy_Field()
  // findBy_Field()
  // findBy_Field1_And_Field2()
}

Popularity 8/10 Helpfulness 4/10 Language java

Source: Grepper

Tags: java repository spring-boot

Link to this answer
Share Copy Link

Contributed on Feb 08 2024

Innocent Iguana

0 Answers Avg Quality 2/10

Closely Related Answers

spring boot repository pattern

Comment

// SQL Schema
CREATE TABLE users (
    id BIGINT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(255),
    age INT
);
// Equivalent Entity Model : User.java
@Entity
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String name;
    private int age;
    // Getters and setters omitted for brevity
}
// Repository class that maps data from database using the Entity class User : UserRepository.java
public interface UserRepository extends JpaRepository<User, Long> {
}
// Business logic interface : UserService.java
public interface UserService {
    List<User> getAllUsers();
    Optional<User> getUserById(Long id);
    User saveUser(User user);
    void deleteUser(Long id);
}
// Business logic implementation of service that uses repository class as dependency to pull business data : UserServiceImpl.java
@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private UserRepository userRepository;
    @Override
    public List<User> getAllUsers() {
        return userRepository.findAll();
    }
    @Override
    public Optional<User> getUserById(Long id) {
        return userRepository.findById(id);
    }
    @Override
    public User saveUser(User user) {
        return userRepository.save(user);
    }
    @Override
    public void deleteUser(Long id) {
        userRepository.deleteById(id);
    }
}

// Rest Controller class that maps url with a service business logic

@RestController
@RequestMapping("/users")
public class UserController {

    @Autowired
    private UserService userService;

    @GetMapping
    public ResponseEntity<List<User>> getAllUsers() {
        List<User> users = userService.getAllUsers();
        return ResponseEntity.ok(users);
    }

    @GetMapping("/{id}")
    public ResponseEntity<User> getUserById(@PathVariable Long id) {
        return userService.getUserById(id)
                .map(ResponseEntity::ok)
                .orElse(ResponseEntity.notFound().build());
    }

    @PostMapping
    public ResponseEntity<User> createUser(@RequestBody User user) {
        User savedUser = userService.saveUser(user);
        return ResponseEntity.status(HttpStatus.CREATED).body(savedUser);
    }

    @DeleteMapping("/{id}")
    public ResponseEntity<Void> deleteUser(@PathVariable Long id) {
        userService.deleteUser(id);
        return ResponseEntity.noContent().build();
    }
}

Popularity 6/10 Helpfulness 5/10 Language java

Source: Grepper

Tags: spring-boot repository-pattern java

Link to this answer
Share Copy Link

Contributed on Mar 10 2024

Innocent Iguana

0 Answers Avg Quality 2/10

repository in spring boot

Contents

More Related Answers

repository in spring boot

Closely Related Answers

spring boot repository pattern

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.