Java日期的格式转化，从一种格式转化为另一种格式

    public static void main(String[] args) {
        String old_str = "12-12月-2022";
        SimpleDateFormat new_format = new SimpleDateFormat("yyyy/MM/dd");
        SimpleDateFormat old_format = new SimpleDateFormat("dd-MM月-yyyy");
        Date date = null;
        try {
            date = old_format.parse(old_str);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        String new_str = new_format.format(date);

        System.out.println(new_str);
        
    }