DateUtil 日期工具类 发现一个错误！

[chorar]

public static int getMonthLength(@NotNull final Date date) {
    int year = get(date, Calendar.YEAR);
    int month = get(date, Calendar.MONTH);
    return getMonthLength(year, month);
}

public static int getMonthLength(int year, int month) {
    if ((month < 1) || (month > 12)) {
        throw new IllegalArgumentException("Invalid month: " + month);
    }
    if (month == 2) {
        return isLeapYear(year) ? 29 : 28;
    }
    return MONTH_LENGTH[month];
}

因为
  int month = get(date, Calendar.MONTH); 获取的月份应该是 0-11 之间
所以
  结果是错误的