Spring Boot -带有配置文件问题的手动JPA配置

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>

spring.datasource.url=jdbc:mysql://localhost:3306/mydatabase
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

@Entity
@Table(name = "user")
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    
    private String name;
    
    // Getters and setters
}

public interface UserRepository extends JpaRepository<User, Long> {
    // 可以在这里定义自定义的查询方法
}

spring.jpa.show-sql=true
spring.jpa.hibernate.ddl-auto=update

@Service
public class UserService {
    @Autowired
    private UserRepository userRepository;
    
    public User getUserById(Long id) {
        return userRepository.findById(id).orElse(null);
    }
    
    // 其他业务方法
}