What is difference between CrudRepository and JpaRepository interfaces in Spring Data JPA

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What is the difference between CrudRepository and JpaRepository interfaces in Spring Data JPA    When I see the examples on the web  I see them there used kind of interchangeably   What is the difference between them   Why would you want to use one over the other

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Summary    PagingAndSortingRepository extends CrudRepository JpaRepository extends PagingAndSortingRepository     The CrudRepository interface provides methods for CRUD operations  so it allows you to create  read  update and delete records without having to define your own methods   The PagingAndSortingRepository provides additional methods to retrieve entities using pagination and sorting    Finally the JpaRepository add some more functionality that is specific to JPA

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I am learning Spring Data JPA  It might help you

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Ken s answer is basically right but I d like to chime in on the  why would you want to use one over the other   part of your question   Basics  The base interface you choose for your repository has two main purposes  First  you allow the Spring Data repository infrastructure to find your interface and trigger the proxy creation so that you inject instances of the interface into clients  The second purpose is to pull in as much functionality as needed into the interface without having to declare extra methods   The common interfaces  The Spring Data core library ships with two base interfaces that expose a dedicated set of functionalities    CrudRepository - CRUD methods PagingAndSortingRepository - methods for pagination and sorting  extends CrudRepository    Store-specific interfaces  The individual store modules  e g  for JPA or MongoDB  expose store-specific extensions of these base interfaces to allow access to store-specific functionality like flushing or dedicated batching that take some store specifics into account  An example for this is deleteInBatch      of JpaRepository which is different from delete      as it uses a query to delete the given entities which is more performant but comes with the side effect of not triggering the JPA-defined cascades  as the spec defines it    We generally recommend not to use these base interfaces as they expose the underlying persistence technology to the clients and thus tighten the coupling between them and the repository  Plus  you get a bit away from the original definition of a repository which is basically  a collection of entities   So if you can  stay with PagingAndSortingRepository   Custom repository base interfaces  The downside of directly depending on one of the provided base interfaces is two-fold  Both of them might be considered as theoretical but I think they re important to be aware of    Depending on a Spring Data repository interface couples your repository interface to the library  I don t think this is a particular issue as you ll probably use abstractions like Page or Pageable in your code anyway  Spring Data is not any different from any other general purpose library like commons-lang or Guava  As long as it provides reasonable benefit  it s just fine  By extending e g  CrudRepository  you expose a complete set of persistence method at once  This is probably fine in most circumstances as well but you might run into situations where you d like to gain more fine-grained control over the methods expose  e g  to create a ReadOnlyRepository that doesn t include the save      and delete      methods of CrudRepository    The solution to both of these downsides is to craft your own base repository interface or even a set of them  In a lot of applications I have seen something like this   interface ApplicationRepository lt T gt  extends PagingAndSortingRepository lt T  Long gt       interface ReadOnlyRepository lt T gt  extends Repository lt T  Long gt          Al finder methods go here     The first repository interface is some general purpose base interface that actually only fixes point 1 but also ties the ID type to be Long for consistency  The second interface usually has all the find         methods copied from CrudRepository and PagingAndSortingRepository but does not expose the manipulating ones  Read more on that approach in the reference documentation   Summary - tl dr  The repository abstraction allows you to pick the base repository totally driven by you architectural and functional needs  Use the ones provided out of the box if they suit  craft your own repository base interfaces if necessary  Stay away from the store specific repository interfaces unless unavoidable

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JpaRepository extends PagingAndSortingRepository which in turn extends CrudRepository    Their main functions are    CrudRepository mainly provides CRUD functions  PagingAndSortingRepository provides methods to do pagination and sorting records  JpaRepository provides some JPA-related methods such as flushing the persistence context and deleting records in a batch    Because of the inheritance mentioned above   JpaRepository will have all the functions of CrudRepository and PagingAndSortingRepository  So if you don t need the repository to have the functions provided by JpaRepository and PagingAndSortingRepository   use CrudRepository

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All the answers provide sufficient details to the question  However  let me add something more   Why are we using these Interfaces    They allow Spring to find your repository interfaces and create proxy objects for them  It provides you with methods that allow you to perform some common operations  you can also define your custom method as well   I love this feature because creating a method  and defining query and prepared statements and then execute the query with connection object  to do a simple operation really sucks     Which interface does what     CrudRepository  provides CRUD functions PagingAndSortingRepository  provides methods to do pagination and sort records JpaRepository  provides JPA related methods such as flushing the persistence context and delete records in a batch   When to use which interface   According to http   jtuts com 2014 08 26 difference-between-crudrepository-and-jparepository-in-spring-data-jpa   Generally the best idea is to use CrudRepository or PagingAndSortingRepository depending on whether you need sorting and paging or not    The JpaRepository should be avoided if possible  because it ties you repositories to the JPA persistence technology  and in most cases you probably wouldn   t even use the extra methods provided by it

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Below are the differences between CrudRepository and JpaRepository as  CrudRepository  CrudRepository is a base interface and extends the Repository interface  CrudRepository mainly provides CRUD  Create  Read  Update  Delete  operations  Return type of saveAll   method is Iterable  Use Case - To perform CRUD operations  define repository extending CrudRepository   JpaRepository  JpaRepository extends PagingAndSortingRepository that extends CrudRepository  JpaRepository provides CRUD and pagination operations  along with additional methods like flush    saveAndFlush    and deleteInBatch    etc  Return type of saveAll   method is a List  Use Case - To perform CRUD as well as batch operations  define repository extends JpaRepository

[java] What is difference between CrudRepository and JpaRepository interfaces in Spring Data JPA?

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