创建一个可运行的jar.各种问题

dependencies {
    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
}

// JPA Entity Class
@Entity
@Table(name = "users")
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    
    private String name;
    private String email;
    // getters and setters
}

// User Repository Interface
public interface UserRepository extends JpaRepository<User, Long> {
}

// User Service Class
@Service
public class UserService {
    @Autowired
    private UserRepository userRepository;
    
    public List<User> findAll() {
        return userRepository.findAll();
    }
}