无论如何都不是 Spring(或 Boot)专家，但是如果属性存在并且有需求，Spring Boot 会自动提供一个 DataSource 类型的 Bean为它.要使用它，您只需 @Autowire 即可.

Not a Spring (or Boot) expert by any means, but Spring Boot will auto-provide a Bean of type DataSource if the properties are there and there's a requirement for it. To use it you just @Autowire it.