1.根据日期获取星期

/**	 * @name: getWeekOfDate()	 * @param: date	 * @return: week	 */	public String getWeekOfDate(Date date){		String[] arrayWeek={"Sun","Mon","Tues","Wed","Thur","Fir","Sat"};		Calendar cal = Calendar.getInstance();		cal.setTime(date);		int w = cal.get(Calendar.DAY_OF_WEEK);	    return arrayWeek[w-1];	}

 2.将字符类型格式化为规定格式的日期类型

/**	 * @name: formatDate()	 * @param: dateStr	 * @return: date	 */	public Date formatDate(String dateStr) throws ParseException{		SimpleDateFormat df =new SimpleDateFormat("yyyy-MM-dd");		Date date = df.parse(dateStr);		return date;	}