How to query data out of the box using Spring data JPA by both Sort and Pageable?

How to query data out of the box using Spring data JPA by both Sort and Pageable?

Spring Data JPA provides the ability to query data with both sorting and pagination using the Sort and Pageable interfaces. Here's how you can use them:

Assuming you have an entity class MyEntity and a Spring Data JPA repository interface MyEntityRepository, you can create a method in the repository to query data with sorting and paging.

  • Define your entity class (MyEntity.java):
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

@Entity
public class MyEntity {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String name;
    private Integer age;

    // getters and setters
}
  • Create a Spring Data JPA repository interface (MyEntityRepository.java):
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.jpa.repository.JpaRepository;

public interface MyEntityRepository extends JpaRepository<MyEntity, Long> {
    Page<MyEntity> findAll(Pageable pageable);
}
  • In your service or controller, you can use Pageable and Sort to query data:
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Sort;
import org.springframework.stereotype.Service;

@Service
public class MyEntityService {

    private final MyEntityRepository myEntityRepository;

    @Autowired
    public MyEntityService(MyEntityRepository myEntityRepository) {
        this.myEntityRepository = myEntityRepository;
    }

    public Page<MyEntity> findAllEntitiesSortedAndPaged(int page, int size, String sortField) {
        // Create a Sort object to define the sorting order
        Sort sort = Sort.by(sortField).ascending(); // Change to .descending() for descending order

        // Create a Pageable object to define the page number, page size, and sorting
        Pageable pageable = PageRequest.of(page, size, sort);

        // Use the repository method to fetch data with sorting and pagination
        return myEntityRepository.findAll(pageable);
    }
}

In this example:

  • We create a Sort object to specify the sorting order based on the sortField.

  • We create a Pageable object to define the page number, page size, and sorting.

  • We use the findAll(pageable) method from the repository to query data with sorting and pagination.

You can then use this service method in your controller to retrieve paginated and sorted data based on your requirements.

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