Playframework 2.1找不到javax.persistence和play.db

我在使用Play框架(版本2.1)创建实体的Scala教程中遇到问题.我正在尝试:

I have a problem with the Scala tutorial for creating an Entity with the play framework (Version 2.1). I'm trying to do:

import java.util._
import javax.persistence._
import play.db.jpa._

但是当我编译它时，它告诉我javax.persistence不存在，而play.db都不存在.

But when I compile it tells me that javax.persistence dosen't exist and play.db neither.

我认为这是版本问题，因为在我看来，实际的yabe教程有点旧.您知道哪个网站提供了很好的解释和示例吗?

I suppose it's a problem of version because it seems to me that the actual yabe-tutorial is a bit old. Do you know any website who has good explanations and examples?

感谢您的帮助！