I am trying to implement pagination feature in Spring Data JPA. I am referring this Blog My Controller contains following code :
@RequestMapping(value="/organizationData", method = RequestMethod.GET)
public String list(Pageable pageable, Model model){
Page<Organization> members = this.OrganizationRepository.findAll(pageable);
model.addAttribute("members", members.getContent());
float nrOfPages = members.getTotalPages();
model.addAttribute("maxPages", nrOfPages);
return "members/list";
}
My DAO is following :
@Query(value="select m from Member m", countQuery="select count(m) from Member m")
Page<Organization> findMembers(Pageable pageable);
I am able to show first 20 records, how do I show next 20??? Is there any other pagination example that I can refer??
You can use the JPA pagination for both entity queries and native SQL. To limit the underlying query ResultSet size, the JPA Query interface provides the setMaxResults method. Navigating the following page requires positioning the result set where the last page ended.
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.
We can create a PageRequest object by passing in the requested page number and the page size. In Spring MVC, we can also choose to obtain the Pageable instance in our controller using Spring Data Web Support. The findAll(Pageable pageable) method by default returns a Page<T> object.
The constructors of Pageable are deprecated, use of()
instead:
Pageable pageable = PageRequest.of(0, 20);
I've seen similar problem last week, but can't find it so I'll answer directly.
Your problem is that you specify the parameters too late. Pageable
works the following way: you create Pageable
object with certain properties. You can at least specify:
So let's assume that we have:
PageRequest p = new PageRequest(2, 20);
the above passed to the query will filter the results so only results from 21th to 40th will be returned.
You don't apply Pageable
on result. You pass it with the query.
Edit:
Constructors of PageRequest
are deprecated. Use Pageable pageable = PageRequest.of(2, 20);
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