Java中两位年份的转化程序代码

public static Date getDate(String strDate) {
    Date date = null;
    if (strDate!= null) {
        SimpleDateFormat formatter = new SimpleDateFormat("yyMM");
        formatter.setLenient(false);
        try {
            date = formatter.parse(strDate);
        }
        catch (Exception e) {
        }
    }
    return date;
}

public static Date getDate(String strDate) {
    Date date = null;
    if (strDate!= null) {
        Calendar startTime = Calendar.getInstance();
        int year = startTime.get(Calendar.YEAR) - 20;
        // 这里初始化时间，然后设置年份。只以年份为基准，不看时间
        startTime.clear();
        startTime.set(Calendar.YEAR, year);

        SimpleDateFormat formatter = new SimpleDateFormat("yyMM");
        formatter.setLenient(false);
        formatter.set2DigitYearStart(startTime.getTime());

        try {
            date = formatter.parse(strDate);
        }
        catch (Exception e) {
        }
    }
    return date;
}