Spring Entity Manager vs Spring Data Repository

Q：What is the difference between an Spring Entity Manager and Spring Data Repository?

A1：

reference:https://stackoverflow.com/questions/14621495/what-is-the-difference-between-an-spring-entity-manager-and-spring-data-reposito

A2：

reference:https://www.javabullets.com/access-entitymanager-spring-data-jpa/