java求n小时候的时间
Calendar c = Calendar.getInstance(); Date date = new Date(); c.setTime(date);// c.add(Calendar.DAY_OF_MONTH, -2); c.add(Calendar.HOUR_OF_DAY, -48); SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); String searchDate = sdf.format(c.getTime());System.out.println(searchDate);
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