public Page<Phone> list(@NonNull Filter filter) {
    Specifications<Phone> specifications = where(equal("id", filter.getId()))
            .and(isBetween("regDate", filter.getRegFrom(), filter.getRegTo()))
            .and(contain("operatorAccPassword", filter.getOpPassword()))
            .and(contain("operatorAccLogin", filter.getOpLogin()))
            .and(contain("operatorName", filter.getOpName()))
            .and(contain("number", filter.getNumber()))
            .and(equal("status", filter.getStatus()))
            .and(contain("note", filter.getNote()));

    return phoneRepository.findAll(specifications, filter.getPageable());
}

public interface PhoneRepository extends CrudRepository<Phone, Integer>, JpaSpecificationExecutor<Phone> {
    class Specifications {
        public static Specification<Phone> equal(@NonNull String column, @NotNull Object value) {
            return (root, criteriaQuery, criteriaBuilder) -> criteriaBuilder.equal(root.get(column), value);
        }

        public static Specification<Phone> contain(@NonNull String column, @NotNull String value) {
            return (root, criteriaQuery, criteriaBuilder) -> criteriaBuilder.like(root.get(column), value);
        }

        public static Specification<Phone> isBetween(@NonNull String column, @NonNull Timestamp from, @NonNull Timestamp to) {
            return (root, criteriaQuery, criteriaBuilder) -> criteriaBuilder.between(root.get(column), from, to);
        }
    }
}