spring boot jpa 复杂查询 动态查询 连接and和or 模糊查询 分页查询

@Override
public SispPage<AnnouncementEntity> findAnnouncementList(Integer pageNo, Integer pageSize, String t1, String t2, String t3, String t4) {
    Sort sort = new Sort(Sort.Direction.DESC, "createTime");
    if (pageNo <= 1) {
        pageNo = 0;
    } else {
        pageNo -= 1;
    }
    PageRequest pageRequest = PageRequest.of(pageNo, pageSize, sort);
    Specification<A> specification = new Specification<A>() {
        @Override
        public Predicate toPredicate(Root<A> root, CriteriaQuery<?> criteriaQuery, CriteriaBuilder criteriaBuilder) {
            List<Predicate> predicates = new ArrayList<>();
            List<Predicate> predicateOr = new ArrayList<>();
            Predicate conditionPre;
            predicates.add(criteriaBuilder.equal(root.get("enable").as(String.class), 1));
            if (StringUtils.isNotBlank(t1)) {
                predicates.add(criteriaBuilder.like(root.get("title").as(String.class), "%" + t1+ "%"));
            }

            if (StringUtils.isNotBlank(t2)) {
                predicates.add(criteriaBuilder.equal(root.get("announcementType").as(String.class), t2));
            }
            if (StringUtils.isNotBlank(t3)) {
                predicates.add(criteriaBuilder.equal(root.get("department").as(String.class), t3));
            }
            if (StringUtils.isNotBlank(t4)) {
                predicateOr.add(criteriaBuilder.like(root.get("noteName").as(String.class), "%" + t4+ "%"));
                predicateOr.add(criteriaBuilder.like(root.get("nameZh").as(String.class), "%" + t4+ "%"));
                conditionPre = criteriaQuery.where(criteriaBuilder.and(predicates.toArray(new Predicate[predicates.size()])),
                        criteriaBuilder.or(predicateOr.toArray(new Predicate[predicateOr.size()]))).getRestriction();
            } else {
                conditionPre = criteriaBuilder.and(predicates.toArray(new Predicate[predicates.size()]));
            }
            return conditionPre;
        }
    };

    Page<AnnouncementEntity> announcementPage = announcementDao.findAll(specification, pageRequest);
    List<AnnouncementEntity> announcementEntityList = announcementPage.getContent();
    

    return announcementEntityList;

}

标签：String,get,jpa,spring,查询,criteriaBuilder,predicates,new,root
来源： https://www.cnblogs.com/lalalazar/p/12019151.html