@Entity @Table(name = "users") public class User { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Long id; @Column(name = "username") private String username; @Column(name = "password") private String password; } @Repository public interface UserRepository extends JpaRepository<User, Long> { } @Service @Transactional public class UserService { @Autowired private UserRepository userRepository; public void createUser(User user) { userRepository.save(user); } public List<User> getAllUsers() { return userRepository.findAll(); } }


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