Calendar calendar= Calendar.getInstance();
calendar.add(Calendar.MINUTE, -1);
Date d=calendar.getTime();
//同一个手机号必须一分钟后才能发送验证码
if(p.getUtime().compareTo(d)==-1){
时间相关的处理
https://blog.csdn.net/u011493218/article/details/75175060
https://zhidao.baidu.com/question/29979581.html