查询当前日期的开始时间和结束时间

	Date date = new Date();
		Calendar start = Calendar.getInstance();
		start.setTime(date);
		start.set(Calendar.HOUR_OF_DAY, 0);
		start.set(Calendar.MINUTE, 0);
		start.set(Calendar.SECOND, 0);
		start.set(Calendar.MILLISECOND, 0);

		Calendar end = Calendar.getInstance();
		end.setTime(date);
		end.set(Calendar.HOUR_OF_DAY, 23);
		end.set(Calendar.MINUTE, 59);
		end.set(Calendar.SECOND, 59);
		end.set(Calendar.MILLISECOND, 999);
		System.out.println(start.getTime());
		System.out.println(end.getTime());