Java provides JPA (Java Persistence API) as a specification for managing relational data, while Hibernate is a popular implementation of that specification. In simple terms, JPA defines the rules, and Hibernate provides the actual functionality.
- JPA is a standard API, whereas Hibernate is a framework that implements JPA
- Hibernate offers additional features beyond JPA, such as advanced caching and query capabilities
Hibernate
Hibernate is an open-source ORM framework that implements JPA and provides advanced features to simplify database operations. It maps Java objects to database tables and reduces the need for writing SQL queries manually.
- Provides built-in caching to improve performance.
- Supports multiple databases with minimal configuration changes.
- Offers HQL (Hibernate Query Language) for object-oriented querying.
JPA
JPA (Java Persistence API) is a Java specification that defines how ORM frameworks should work. It provides a standard set of interfaces and annotations to manage relational data but requires an implementation like Hibernate to perform actual operations.
- Uses annotations like @Entity, @Id, and @Table for mapping.
- Allows switching between different ORM tools easily.
- Provides EntityManager for managing persistence operations.
Differences Between JPA and Hibernate
The following table describes the differences:
JPA | Hibernate |
|---|---|
| JPA is described in javax.persistence package. | Hibernate is described in org.hibernate package. |
| It describes the handling of relational data in Java applications. | Hibernate is an Object-Relational Mapping (ORM) tool that is used to save Java objects in the relational database system. |
| It is not an implementation. It is only a Java specification. | Hibernate is an implementation of JPA. Hence, the common standard which is given by JPA is followed by Hibernate. |
It is a standard API that permits to perform database operations. | It is used in mapping Java data types with SQL data types and database tables. |
As an object-oriented query language, it uses Java Persistence Query Language (JPQL) to execute database operations. | As an object-oriented query language, it uses Hibernate Query Language (HQL) to execute database operations. |
To interconnect with the entity manager factory for the persistence unit, it uses the EntityManagerFactory interface. Thus, it gives an entity manager. | To create Session instances, it uses the SessionFactory interface. |
To make, read, and remove actions for instances of mapped entity classes, it uses the EntityManager interface. This interface interconnects with the persistence condition. | To make, read, and remove actions for instances of mapped entity classes, it uses Session interface. It acts as a runtime interface between a Java application and Hibernate. |