Spring JPA CRUDRepository 📣
In Spring Boot, CrudRepository is an interface provided by Spring Data JPA that simplifies the implementation of CRUD [Create, Read, Update, Delete] operations on a database entity.
CRUD Operations: Provides methods for standard CRUD operations.
Generic Type Parameters: Works with any entity class and its primary key type.
Query Methods: Supports query methods with naming conventions.
Simple and Easy to Use: Minimal setup required, making it great for prototyping and small applications.
Basic Methods:
save : Saves the given entity. If the entity has an ID, it performs an update; otherwise, it creates a new record.
findById : Retrieves the entity with the given ID. Returns an Optional.
existsById : Checks whether an entity with the given ID exists. Returns a boolean value.
findAll : Returns all entities as an Iterable.
count : Returns the total number of entities.
deleteById: Deletes the entity with the given ID.
delete: Deletes the given entity.
deleteAll: Deletes all entities.
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