java 根据日期获取星期

/**
 * 根据日期获取星期
* @param args
*/
public static void main(String[] args) {
    Calendar calendar = Calendar.getInstance();
    Date date = calendar.getTime();
    String week = dateToWeek(date);
    System.out.println(week);
}


/**
 * 根据日期获取 星期
* @param date
* @return
*/
public static String dateToWeek(Date date) {
    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();
    try {
        cal.setTime(date);
    } catch (Exception e) {
        e.printStackTrace();
    }
    //一周的第几天
    int w = cal.get(Calendar.DAY_OF_WEEK) - 1;
    if (w < 0)
        w = 0;
    return weekDays[w];
}