JAVA 根据身份证号码解析出生日期、性别、年龄

public class CertificateNo {
public ResultDTO parseCertificateNo(String certificateNo) {

        ResultDTO resultDTO = new ResultDTO();
        String myRegExpIDCardNo = "^\d{6}(((19|20)\d{2}(0[1-9]|1[0-2])(0[1-9]|[1-2][0-9]|3[0-1])\d{3}([0-9]|x|X))|(\d{2}(0[1-9]|1[0-2])(0[1-9]|[1-2][0-9]|3[0-1])\d{3}))$";
        boolean valid=Pattern.matches(myRegExpIDCardNo,certificateNo)||(certificateNo.length() == 17 && Pattern.matches(myRegExpIDCardNo,certificateNo.substring(0,15)));
        if(!valid){
            resultDTO.setStatueMessage("证件号码不规范!");
            return resultDTO;
        }
        int idxSexStart = 16;
        int birthYearSpan = 4;
        //如果是15位的证件号码
        if(certificateNo.length() == 15) {
            idxSexStart = 14;
            birthYearSpan = 2;
        }

        //性别
        String idxSexStr = certificateNo.substring(idxSexStart, idxSexStart + 1);
        int idxSex = Integer.parseInt(idxSexStr) % 2;
        String sex = (idxSex == 1) ? "M" : "F";
        resultDTO.setSex(sex);

        //出生日期
        String year = (birthYearSpan == 2 ? "19" : "") + certificateNo.substring(6, 6 + birthYearSpan);
        String month = certificateNo.substring(6 + birthYearSpan, 6 + birthYearSpan + 2);
        String day = certificateNo.substring(8 + birthYearSpan, 8 + birthYearSpan + 2);
        String birthday = year + '-' + month + '-' + day;
        resultDTO.setBirthday(birthday);

        //年龄
        Calendar certificateCal = Calendar.getInstance();
        Calendar currentTimeCal = Calendar.getInstance();
        certificateCal.set(Integer.parseInt(year), Integer.parseInt(month)-1, Integer.parseInt(day));
        int yearAge = (currentTimeCal.get(currentTimeCal.YEAR)) - (certificateCal.get(certificateCal.YEAR));
        certificateCal.set(currentTimeCal.get(Calendar.YEAR), Integer.parseInt(month)-1, Integer.parseInt(day));
        int monthFloor = (currentTimeCal.before(certificateCal) ? 1 : 0);
        resultDTO.setAge(yearAge - monthFloor);

        return resultDTO;
    }
}
}