Java 判断当前日期星期几

public static int dayForWeek(String pTime) throws Exception {
    SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
    Calendar c = Calendar.getInstance();
    c.setTime(format.parse(pTime));
    int dayForWeek = 0;
    if (c.get(Calendar.DAY_OF_WEEK) == 1) {
        dayForWeek = 7;
    } else {
        dayForWeek = c.get(Calendar.DAY_OF_WEEK) - 1;
    }
    return dayForWeek;
}