身份证获取生日，性别，年龄算法

import java.util.Calendar;
import java.util.regex.Pattern;
import com.zhongan.contacts.user.dto.ResultDTO;


/**
 * 身份证算法[计算性别,生日,年龄]
 * @author daichangbo
  */
public class CertificateNoUtils { 


public static 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;  
}  
}