java日期处理

/**
	 * 获取当前日期是星期几
	 * 
	 * @param dt
	 * @return 当前日期是星期几
	 */
	public static String getWeekOfDate(Date dt) {
	    String[] weekDays = {"星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"};
	    Calendar cal = Calendar.getInstance();
	    cal.setTime(dt);
	    int w = cal.get(Calendar.DAY_OF_WEEK) - 1;
	    if (w < 0)
	        w = 0;
	    return weekDays[w];
	}