req.curPage當前頁碼， req.pageSize每頁的條目數
PageRequest pageReques = PageRequest.of(req.curPage, req.pageSize);
Specification<Enroll> spec = new Specification<Enroll>() {
@Override
public Predicate toPredicate(Root<Enroll> root, CriteriaQuery<?> criteriaQuery, CriteriaBuilder criteriaBuilder) {
List<Predicate> predicateList = new ArrayList<>();
//使用JPA查詢某個字段是否在數組中
if (placeIds.size() > 0) {
Path<String> path = root.get("place_id");//定義查詢的字段
CriteriaBuilder.In<String> in = criteriaBuilder.in(path);
for (int i = 0; i < placeIds.size(); i++) {
in.value(placeIds.get(i));//存入值
} predicateList.add(in);
}
if (req.condition.verify_state != 0) {
predicateList.add(criteriaBuilder.equal(root.get("verify_state").as(Integer.class), req.condition.verify_state));
}
Predicate[] pre = new Predicate[predicateList.size()];
pre = predicateList.toArray(pre);
return criteriaQuery.where(pre).getRestriction();
}
};
Long count = enrollRepository.count(spec);
Page<Enroll> pages = enrollRepository.findAll(spec, pageReques);
List<Enroll> enrollList = pages.getContent(); //查詢的最后結果
