public class Test11 {
    public static void main(String[] args) {
        System.out.println(getWeeksInMonthOfDate("2023-03-07"));
    }
    /**
     * 獲取指定日期-XXXX年X月第X周
     * @param dateStr
     * @return
     */
    public static String getWeeksInMonthOfDate(String dateStr){
        SimpleDateFormat df=new SimpleDateFormat("yyyy-MM-dd");
        Calendar calendar = Calendar.getInstance();
        try {
            calendar.setTime(df.parse(dateStr));
        } catch (ParseException e) {
            e.printStackTrace();
        }
        //設置每周第一天為周一 默認每周第一天為周日
        calendar.setFirstDayOfWeek(Calendar.MONDAY);
        //獲取當前日期所在周周日
        calendar.set(Calendar.DAY_OF_WEEK,Calendar.SUNDAY);
        return String.valueOf(calendar.get(Calendar.YEAR)).concat("年").
                concat(String.valueOf(calendar.get(Calendar.MONTH)+1)).concat("月第").
                concat(String.valueOf(calendar.get(Calendar.WEEK_OF_MONTH))).concat("周");
    }
}

function getWeekDay(date1){
	let date2 = new Date(date1.getFullYear(), 0, 1);
	let d = Math.round((date1.valueOf() - date2.valueOf()) / 86400000);
	return Math.ceil((d + ((date2.getDay() + 1) - 1)) / 7);
}
getWeekDay(new Date());