spring data jpa 日期的使用

 @Temporal(TemporalType.TIMESTAMP) private Date transtime;//交易时间

        LocalDateTime timepoint = LocalDateTime.now();
        System.out.print("\ntimepoint.getHour():"+timepoint.getHour()+"\n");
        Date date = Date.from(timepoint.atZone(ZoneId.systemDefault()).toInstant());