获取当前系统时间是周几

public static StringgetCurrentWeekDay(){

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(new Date(System.currentTimeMillis()));

    int w = cal.get(Calendar.DAY_OF_WEEK) -1;

    if (w <0)

w =0;

    return weekDays[w];

}