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使用Spring Data JPA CrudRepository 和JpaRepository 的好处：

• 继承这些接口，可以使Spring找到自定义的数据库操作接口，并生成代理类，后续可以注入到Spring容器中；
• 可以不写相关的sql操作，由代理类生成

他们存在继承关系：

PagingAndSortingRepository

继承

CrudRepository



JpaRepository

继承

PagingAndSortingRepository

也就是说，

CrudRepository

提供基本的增删改查；

PagingAndSortingRepository

提供分页和排序方法；

JpaRepository

提供JPA需要的方法。

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

.