获取当前时间周月年开始结束时间

	/**
	 * 获取指定天的开始时间
	 * @return
	 */
	public static Date getStartTimeOfCurrentDay(Date date){
		Calendar calendar = Calendar.getInstance();
		calendar.clear();
		calendar.setTime(date);
		setMinTimeOfDay(calendar);
		return calendar.getTime();
	}

	/**
	 * 获取指定天的结束时间
	 * @return
	 */
	public static Date getEndTimeOfCurrentDay(Date date){
		Calendar calendar = Calendar.getInstance();
		calendar.clear();
		calendar.setTime(date);
		setMaxTimeOfDay(calendar);
		return calendar.getTime();
	}

	/**
	 * 获取指定周的开始时间
	 * @return
	 */
	public static Date getStartTimeOfCurrentWeek(Date date){
		Calendar calendar = Calendar.getInstance();
		calendar.clear();
		calendar.setTime(date);
		calendar.setFirstDayOfWeek(Calendar.MONDAY);
		calendar.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
		setMinTimeOfDay(calendar);
		return calendar.getTime();
	}

	/**
	 * 获取指定月的结束时间
	 * @return
	 */
	public static Date getEndTimeOfCurrentWeek(Date date){
		Calendar calendar = Calendar.getInstance();
		calendar.clear();
		calendar.setTime(date);
		calendar.setFirstDayOfWeek(Calendar.MONDAY);
		calendar.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);
		setMaxTimeOfDay(calendar);
		return calendar.getTime();
	}

	/**
	 * 获取指定月的开始时间
	 * @return
	 */
	public static Date getStartTimeOfCurrentMonth(Date date){
		Calendar calendar = Calendar.getInstance();
		calendar.clear();
		calendar.setTime(date);
		calendar.set(calendar.get(Calendar.YEAR),calendar.get(Calendar.MONTH),1);
		setMinTimeOfDay(calendar);
		return calendar.getTime();
	}

	/**
	 * 获取指定月的结束时间
	 * @return
	 */
	public static Date getEndTimeOfCurrentMonth(Date date){
		Calendar calendar = Calendar.getInstance();
		calendar.clear();
		calendar.setTime(date);
		int maxMonthDay = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
		calendar.set(calendar.get(Calendar.YEAR),calendar.get(Calendar.MONTH),maxMonthDay);
		setMaxTimeOfDay(calendar);
		return calendar.getTime();
	}

	/**
	 * 获取指定年的开始时间 注意月份要减1
	 * @return
	 */
	public static Date getStartTimeOfCurrentYear(Date date){
		Calendar calendar = Calendar.getInstance();
		calendar.clear();
		calendar.setTime(date);
		calendar.set(calendar.get(Calendar.YEAR),0,1);
		setMinTimeOfDay(calendar);
		return calendar.getTime();
	}

	/**
	 * 获取指定年的结束时间 注意月份要减1
	 * @return
	 */
	public static Date getEndTimeOfCurrentYear(Date date){
		Calendar calendar = Calendar.getInstance();
		calendar.clear();
		calendar.setTime(date);
		calendar.set(calendar.get(Calendar.YEAR),11,31);
		setMaxTimeOfDay(calendar);
		return calendar.getTime();
	}

	/**
	 * 设置当天的开始时间
	 * @param calendar
	 */
	private static void setMinTimeOfDay(Calendar calendar) {
		calendar.set(Calendar.HOUR_OF_DAY, 0);
		calendar.set(Calendar.SECOND, 0);
		calendar.set(Calendar.MINUTE, 0);
		calendar.set(Calendar.MILLISECOND, 0);
	}

	/**
	 * 设置当天的结束时间
	 *
	 * @param calendar
	 */
	private static void setMaxTimeOfDay(Calendar calendar) {
		calendar.set(Calendar.HOUR_OF_DAY, 23);
		calendar.set(Calendar.SECOND, 59);
		calendar.set(Calendar.MINUTE, 59);
		calendar.set(Calendar.MILLISECOND, 999);
	}