CSS没有响应。缓存问题

Question

private int getAge(Date birthDate) {
    int birthYear = Integer.parseInt(DateTimeFormat.getFormat("yyyy").format(birthDate));
    int birthMonth = Integer.parseInt(DateTimeFormat.getFormat("MM").format(birthDate));
    int birthDayOfMonth = Integer.parseInt(DateTimeFormat.getFormat("dd").format(birthDate));
    Date today = new Date();
    int todayYear = Integer.parseInt(DateTimeFormat.getFormat("yyyy").format(today));
    int todayMonth = Integer.parseInt(DateTimeFormat.getFormat("MM").format(today));
    int todayDayOfMonth = Integer.parseInt(DateTimeFormat.getFormat("dd").format(today));

    boolean hasHadBirthdayThisYear;
    if (todayMonth < birthMonth) {
        hasHadBirthdayThisYear = false;
    } else if (todayMonth > birthMonth) {
        hasHadBirthdayThisYear = true;
    } else {
        hasHadBirthdayThisYear = birthDayOfMonth <= todayDayOfMonth;
    }

    int age = todayYear - birthYear;
    if (!hasHadBirthdayThisYear) {
        age--;
    }
    return age;
}

我想对我的css文件进行一些小的更改，但网站没有回复它们。我可以在标题中添加任何类型的缓存HTML代码吗？