spring引导中的@Entity和@Document有什么区别？

Question

Can you use both annotations on your database tables?

id, just like some clarification on there differences. thank you

Answer 1

@Entity is used to map a class to a relational database, it represents a database table.

@Document is used to map a class to noSQL database (specifically mongoDB), it represents a MongoDB documents.

You can use both JPA or MongoRepository if you are using both databases by creating different entities and repositories for each database.

I recommend you to have a look at spring documentation ( https://docs.spring.io/spring-data/jpa/docs/current/reference/html/ )

Answer 2

@Document is a Spring Data Mongo annotation while @Entity is part of Java Persistence API (JPA).

You can check both documentations:

• Spring Data Mongo docs
• JPA docs

Where into "Example 10. Repository definitions using domain classes with annotations" there is this piece of code:

interface PersonRepository extends Repository<Person, Long> { … }

@Entity
class Person { … }

interface UserRepository extends Repository<User, Long> { … }

@Document
class User { … }

And documentation says:

PersonRepository references Person , which is annotated with the JPA @Entity annotation, so this repository clearly belongs to Spring Data JPA. UserRepository references User , which is annotated with Spring Data MongoDB's @Document annotation.

So you can see here the difference.