What is the difference between Hibernate and Spring Data JPA

Question

What are the main differences between Hibernate and Spring Data JPA  When should we not use Hibernate or Spring Data JPA  Also  when may Spring JDBC template perform better than Hibernate   Spring Data JPA

User · Answer

If you prefer simplicity and more control on SQL queries then I would suggest going with Spring Data/ Spring JDBC.

Its good amount of learning curve in JPA and sometimes difficult to debug issues. On the other hand, while you have full control over SQL, it becomes much easier to optimize query and improve performance. You can easily share your SQL with DBA or someone who has a better understanding of Database.

User · Answer

There are 3 different things we are using here     JPA   Java persistence api which provide specification for persisting  reading  managing data from your java object to relations in database  Hibernate  There are various provider which implement jpa  Hibernate is one of them  So we have other provider as well  But if using jpa with spring it allows you to switch to different providers in future   Spring Data JPA   This is another layer on top of jpa which spring provide to make your life easy     So lets understand how spring data jpa and spring   hibernate works-    Spring Data JPA   Let s say you are using spring   hibernate for your application  Now you need to have dao interface and implementation where you will be writing crud operation using SessionFactory of hibernate  Let say you are writing dao class for Employee class  tomorrow in your application you might need to write similiar crud operation for any other entity  So there is lot of boilerplate code we can see here   Now Spring data jpa allow us to define dao interfaces by extending its repositories crudrepository  jparepository  so it provide you dao implementation at runtime  You don t need to write dao implementation anymore Thats how spring data jpa makes your life easy

User · Answer

Hibernate is a JPA implementation  while Spring Data JPA is a JPA data access abstraction  Spring Data JPA cannot work without a JPA provider  Spring Data offers a solution to the DDD Repository pattern or the legacy GenericDao custom implementations  It can also generate JPA queries on your behalf through method name conventions  With Spring Data  you may use Hibernate  EclipseLink  or any other JPA provider  A very interesting benefit of using Spring or Java EE is that you can control transaction boundaries declaratively using the  Transactional annotation  Spring JDBC is much more lightweight  and it s intended for native querying  and if you only intend to use JDBC alone  then you are better off using Spring JDBC to deal with the JDBC verbosity  Therefore  Hibernate and Spring Data are complementary rather than competitors

User · Answer

I disagree SpringJPA makes live easy  Yes  it provides some classes and you can make some simple DAO fast  but in fact  it s all you can do  If you want to do something more than findById   or save  you must go through hell    no EntityManager access in org springframework data repository classes  this is basic JPA class   own transaction management  hibernate transactions disallowed  huge problems with more than one datasources configuration no datasource pooling  HikariCP must be in use as third party library    Why own transaction management is an disadvantage  Since Java 1 8 allows default methods into interfaces  Spring annotation based transactions  simple doesn t work   Unfortunately  SpringJPA is based on reflections  and sometimes you need to point a method name or entity package into annotations      That s why any refactoring makes big crash  Sadly   Transactional works for primary DS only    So  if you have more than one DataSources  remember - transactions works just for primary one        What are the main differences between Hibernate and Spring Data JPA    Hibernate is JPA compatibile  SpringJPA Spring compatibile  Your HibernateJPA DAO can be used with JavaEE or Hibernate Standalone  when SpringJPA can be used within Spring -  SpringBoot for example     When should we not use Hibernate or Spring Data JPA  Also  when may Spring JDBC template perform better than Hibernate   Spring Data JPA    Use Spring JDBC only when you need to use much Joins or when you need to use Spring having multiple datasource connections  Generally  avoid JPA for Joins   But my general advice  use fresh solution mdash Daobab  http   www daobab io   Daobab is my Java and any JPA engine integrator  and I believe it will help much in your tasks

User · Answer

Hibernate is implementation of  JPA  which is a specification for Java objects in Database   I would recommend to use w r t JPA as you can switch between different ORMS   When you use JDBC then you need to use SQL Queries  so if you are proficient in SQL then go for JDBC

User · Answer

Spring Data is a convenience library on top of JPA that abstracts away many things and brings Spring magic  like it or not  to the persistence store access  It is primarily used for working with relational databases  In short  it allows you to declare interfaces that have methods like findByNameOrderByAge String name   that will be parsed in runtime and converted into appropriate JPA queries   Its placement atop of JPA makes its use tempting for    Rookie developers who don t know SQL or know it badly  This is a recipe for disaster but they can get away with it if the project is trivial   Experienced engineers who know what they do and want to spindle up things fast  This might be a viable strategy  but read further     From my experience with Spring Data  its magic is too much  this is applicable to Spring in general   I started to use it heavily in one project and eventually hit several corner cases where I couldn t get the library out of my way and ended up with ugly workarounds  Later I read other users  complaints and realized that these issues are typical for Spring Data  For example  check this issue that led to hours of investigation swearing    public TourAccommodationRate createTourAccommodationRate           RequestBody TourAccommodationRate tourAccommodationRate                 if  tourAccommodationRate getId      null                throw new BadRequestException  id MUST NOT be specified in a body during entry creation                          This is an ugly hack required for the Room slim model to work  The problem stems from the fact that            when we send a child entity having the many-to-many  M N  relation to the containing entity  its            information is not fetched  As a result  we get NPEs when trying to access all but its Id in the            code creating the corresponding slim model  By detaching the entity from the persistence context we            force the ORM to re-fetch it from the database instead of taking it from the cache          tourAccommodationRateRepository save tourAccommodationRate           entityManager detach tourAccommodationRate           return tourAccommodationRateRepository findOne tourAccommodationRate getId             I ended up going lower level and started using JDBI - a nice library with just enough  magic  to save you from the boilerplate  With it  you have complete control over SQL queries and almost never have to fight the library

[java] What is the difference between Hibernate and Spring Data JPA

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