【Java】根据日期获取星期几

public class Test {
    public static void main(String[] args) throws ParseException {
        String date = "2022-3-26";
        //根据日期获得星期几
        String weekStr = getWeek(date);
        System.out.println(weekStr);
    }

    public static String getWeek(String sdate) throws ParseException {
        // 再转换为时间
        DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
        String[] weeks = {"星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"};
        Date parseDate = dateFormat.parse(sdate);
        Calendar c = Calendar.getInstance();
        c.setTime(parseDate);
        int week_index = c.get(Calendar.DAY_OF_WEEK) - 1;
        if (week_index < 0) {
            week_index = 0;
        }
        return weeks[week_index];
    }

}