jsp 取到list 能遍历 却不能取到对象的属性 springboot JPA

private List<Policy> getQueryResult(StringBuilder baseJpql, Map<String, Object> paras, Pageable pageable) {
        //一定要注意加上后面的Policy.class，不然不会自动将查询到的结果映射到policy上，导致得到的是一个List<Object[]>，最终导致无法在jsp取到policy的属性
        Query query = em.createQuery("SELECT p "+baseJpql.toString(),Policy.class);
//        Query query = em.createNativeQuery("SELECT id, title, author, url, publishTime, menuCode, urlCode, createTime, createUser, updateTime "+baseJpql.toString(),Policy.class);

        setQueryParameter(query,paras);
        query.setFirstResult((int) pageable.getOffset());
        query.setMaxResults(pageable.getPageSize());
        return query.getResultList();
    }