/**     * 获取当前日期是周几     *     * @param dt     * @return 当前日期是周几     */    public static String getWeekOfDate(Date dt) {        String[] weekDays = {"周日", "周一", "周二", "周三", "周四", "周五", "周六"};        Calendar cal = Calendar.getInstance();        cal.setTime(dt);        int w = cal.get(Calendar.DAY_OF_WEEK) - 1;        if (w < 0)            w = 0;        return weekDays[w];    }