如何在Hibernate 5中自动连接SessionFactory？

Question

我尝试自动装配SessionFactory，但得到此错误：

APPLICATION FAILED TO START
***************************

Description:

Field bookRepository in com.test.app.BookService required a bean named 'entityManagerFactory' that could not be found.

这里我自动装配SessionFactory：

@Service
class TestClass{
    @Autowired
    lateinit var sessionFactory: SessionFactory
......
}

这是我的配置类：

@Configuration
class SpringConfig {
    @Bean
    fun sessionFactory(emf: EntityManagerFactory): HibernateJpaSessionFactoryBean {
        val fact = HibernateJpaSessionFactoryBean()
        fact.entityManagerFactory = emf
        return fact
    }
}

我试着这样做：

@Configuration
class SpringConfig {
    @Bean
    fun sessionFactory(): HibernateJpaSessionFactoryBean {
        return HibernateJpaSessionFactoryBean()
    }
}

我的application.yml：

spring:
    datasource:
        driver-class-name: org.postgresql.Driver
        url: datasource_url
        password: password
        username: username
        hikari:
            maximum-pool-size: 5
    jpa:
        properties:
            hibernate:
                jdbc:
                    batch_size: 20
                current_session_context_class: org.springframework.orm.hibernate5.SpringSessionContext

Hibernate版本：5.4.1

Spring boot版本：2.0.0.M3