spring-data-jpa

@Entity
@Table(name = "users")
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Column(nullable = false)
    private String name;

    @Column(unique = true, nullable = false)
    private String email;

    @CreatedDate
    private LocalDateTime createdAt;

    // Getters and setters
}

public interface UserRepository extends JpaRepository<User, Long> {
    Optional<User> findByEmail(String email);
    List<User> findByNameContaining(String name);
    Page<User> findByNameContaining(String name, Pageable pageable);

    @Query("SELECT u FROM User u WHERE u.email = :email")
    Optional<User> findByEmailCustom(@Param("email") String email);
}

@Service
@Transactional
public class UserService {
    private final UserRepository userRepository;

    public UserService(UserRepository userRepository) {
        this.userRepository = userRepository;
    }

    public User create(String name, String email) {
        User user = new User();
        user.setName(name);
        user.setEmail(email);
        return userRepository.save(user);
    }

    @Transactional(readOnly = true)
    public Page<User> search(String name, Pageable pageable) {
        return userRepository.findByNameContaining(name, pageable);
    }
}

spring:
  datasource:
    url: jdbc:postgresql://localhost:5432/mydb
    username: postgres
    password: password
  jpa:
    hibernate:
      ddl-auto: validate
    show-sql: false
    properties:
      hibernate.format_sql: true