java时间
//SimpleDateFormat dateformat= new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Calendar shenpiCalendar = Calendar.getInstance();
shenpiCalendar.set(Calendar.HOUR_OF_DAY, 0);
shenpiCalendar.set(Calendar.MINUTE, 0);
shenpiCalendar.set(Calendar.SECOND, 0);
String stampStartString = dateformat.format(shenpiCalendar.getTime().getTime());
//30天之后的calendar
shenpiCalendar.add(Calendar.DAY_OF_YEAR, 60);
shenpiCalendar.set(Calendar.HOUR_OF_DAY, 23);
shenpiCalendar.set(Calendar.MINUTE, 59);
shenpiCalendar.set(Calendar.SECOND, 59);
//Timestamp stampEnd = new Timestamp(yjzhouCalendar.getTime().getTime());
String stampEndString = dateformat.format(shenpiCalendar.getTime().getTime());
new Timestamp(System.currentTimeMillis())