直接上代码:
Calendar calendar = new GregorianCalendar(); calendar.add(Calendar.DAY_OF_MONTH,-1); //一天的开始时间 yyyy:MM:dd 00:00:00 calendar.set(Calendar.HOUR_OF_DAY,0); calendar.set(Calendar.MINUTE,0); calendar.set(Calendar.SECOND,0); calendar.set(Calendar.MILLISECOND,0); Date dayStart = calendar.getTime(); SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); String startStr = simpleDateFormat.format(dayStart) ;