//日期格式为字符串 DateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss"); String s = sdf.format(new Date());
//字符串转日期 DateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss"); String s = "2019-10-31 22:53:10"; Date date = sdf.parse(s);