//需要用到的包
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
//findAll查询
Sort s = Sort.by(Sort.Direction.DESC, "updatedTime");//更新时间倒序排序
Pageable pageable = PageRequest.of(pageNumber - 1, pageSize, s);//排序规则放到pageable中
Page<Goods> page = goodsRepository.findAll((Specification<Goods>) (root, criteriaQuery, criteriaBuilder) -> {
List<Predicate> list = Lists.newArrayList();
list.add(criteriaBuilder.notEqual(root.get("del"), Goods.Del.YES.getCode()));
Predicate[] arr = new Predicate[list.size()];
criteriaQuery.orderBy(criteriaBuilder.desc(root.get("createdTime")));//根据创建时间倒叙排序，注意这种排休会被pageable的排序给覆盖掉
criteriaQuery.where(list.toArray(arr));
return criteriaQuery.getRestriction();
}, pageable);//注意这里使用了pageable不管pageable有没有设置排序都会覆盖掉criteriaQuery.orderBy(）的排序，如果pageable没有设置排序那结果就是无序的
