1、比较两个日期是否是同一天
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); Date lastRecordTimeD = sdf.parse(lines[2]); Calendar lastRecordTimeCal = new GregorianCalendar(); lastRecordTimeCal.setTime(lastRecordTimeD); Calendar nowTime = Calendar.getInstance(); Calendar tempDate = (Calendar) nowTime.clone(); tempDate.set(Calendar.YEAR, lastRecordTimeCal.get(Calendar.YEAR)); tempDate.set(Calendar.MONTH, lastRecordTimeCal.get(Calendar.MONTH)); tempDate.set(Calendar.DAY_OF_MONTH,lastRecordTimeCal.get(Calendar.DAY_OF_MONTH)); //是否是同一天 boolean sameDay = false; if (nowTime.equals(tempDate)) { sameDay = true; }