> For the complete documentation index, see [llms.txt](https://jack80342.gitbook.io/spring-boot/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://jack80342.gitbook.io/spring-boot/ix.-how-to-guides/79.-data-access/79.7-use-a-custom-entitymanagerfactory.md).

# 79.7 使用自定义EntityManagerFactory

为了完全控制`EntityManagerFactory`的配置，你需要添加一个名为`entityManagerFactory`的`@Bean`。Spring Boot自动配置会根据是否存在该类型的bean来关闭它的实体管理器（entity manager）。