春季启动：@GetMapping与Pageable作为请求参数无法正常工作

Question

I am using Spring Boot 2 and I have write a @RestController within a @GetMapping that takes a Pageable as parameter.

@GetMapping
public ResponseEntity<Page<AppointmentTO>> findAll(Pageable pageable) {
    Page<AppointmentTO> page = appointmentService.findAll(pageable);
    return ResponseEntity.ok(page);
}

The problem is the following:

By each request, the queries-parameters pageSize and offset are always reset to default when they arrived in Spring Boot Backend ( ?offset=0&pageSize=20 ), however I send different parameters in the url of my request ( ?offset=15&pageSize=5 for example).

Answer 1

Spring Boot maps the request params to org.springframework.data.domain.PageRequest that extends AbstractPageRequest

  AbstractPageRequest implements Pageable, Serializable {
    ...
    private final int page;
    private final int size;

    public long getOffset() {
        return (long)this.page * (long)this.size;
    }
    ...

You should use following url:

http://localhost:8080?page=3&size=5

Also you could add sorting by ...&sort=name