신분증 규칙 검증 자바 코드

package com.haier.hmms.util;
import java.text.SimpleDateFormat;
import java.util.Date;
/**
 *              ,               ，             ;        ：6     +8   +3    +1    
 * 
 * @ClassName: CheckIdCard
 * @Description: TODO
 * @author suncy
 * @date 2013-1-4   11:06:09
 * 
 */
public class CheckIdCard {
 private String cardNumber; //         
 private Boolean cacheValidateResult = null; //          ，                
 private Date cacheBirthDate = null; //       ，               
 private final static String BIRTH_DATE_FORMAT = "yyyyMMdd"; //               
 private final static Date MINIMAL_BIRTH_DATE = new Date(-2209017600000L); //           ,1900 1 1 
 private final static int NEW_CARD_NUMBER_LENGTH = 18;
 private final static int OLD_CARD_NUMBER_LENGTH = 15;
 private final static char[] VERIFY_CODE = { '1', '0', 'X', '9', '8', '7',
   '6', '5', '4', '3', '2' }; // 18            
 private final static int[] VERIFY_CODE_WEIGHT = { 7, 9, 10, 5, 8, 4, 2, 1,
   6, 3, 7, 9, 10, 5, 8, 4, 2 };// 18     ，              
 public boolean validate() {
  if (null == cacheValidateResult) {
   boolean result = true;
   result = result && (null != cardNumber); //         
   result = result && NEW_CARD_NUMBER_LENGTH == cardNumber.length(); //        18(  )
   //       17         
   for (int i = 0; result && i < NEW_CARD_NUMBER_LENGTH - 1; i++) {
    char ch = cardNumber.charAt(i);
    result = result && ch >= '0' && ch <= '9';
   }
   //       18     
   result = result
     && (calculateVerifyCode(cardNumber) == cardNumber
       .charAt(NEW_CARD_NUMBER_LENGTH - 1));
   //             ，      1900 
   try {
    Date birthDate = this.getBirthDate();
    result = result && null != birthDate;
    result = result && birthDate.before(new Date());
    result = result && birthDate.after(MINIMAL_BIRTH_DATE);
    /**
     *        、 、     ,       [1,12],     [1,31]，       、  、      ，
     *         
     */
    String birthdayPart = this.getBirthDayPart();
    String realBirthdayPart = this.createBirthDateParser().format(
      birthDate);
    result = result && (birthdayPart.equals(realBirthdayPart));
   } catch (Exception e) {
    result = false;
   }
   cacheValidateResult = Boolean.valueOf(result);// TODO
               //                 
  }
  return cacheValidateResult;
 }
 /**
  *    15      ，      18 
  * 
  * @param cardNumber
  * @return 
  */
 public CheckIdCard(String cardNumber) {
  if (null != cardNumber) {
   cardNumber = cardNumber.trim();
   if (OLD_CARD_NUMBER_LENGTH == cardNumber.length()) {
    cardNumber = contertToNewCardNumber(cardNumber);
   }
  }
  this.cardNumber = cardNumber;
 }
 public String getCardNumber() {
  return cardNumber;
 }
 public String getAddressCode() {
  this.checkIfValid();
  return this.cardNumber.substring(0, 6);
 }
 public Date getBirthDate() {
  if (null == this.cacheBirthDate) {
   try {
    this.cacheBirthDate = this.createBirthDateParser().parse(
      this.getBirthDayPart());
   } catch (Exception e) {
    throw new RuntimeException("          ");
   }
  }
  return new Date(this.cacheBirthDate.getTime());
 }
 public boolean isMale() {
  return 1 == this.getGenderCode();
 }
 public boolean isFemal() {
  return false == this.isMale();
 }
 /**
  *        17 ，     ，     
  * 
  * @return
  */
 private int getGenderCode() {
  this.checkIfValid();
  char genderCode = this.cardNumber.charAt(NEW_CARD_NUMBER_LENGTH - 2);
  return (((int) (genderCode - '0')) & 0x1);
 }
 private String getBirthDayPart() {
  return this.cardNumber.substring(6, 14);
 }
 private SimpleDateFormat createBirthDateParser() {
  return new SimpleDateFormat(BIRTH_DATE_FORMAT);
 }
 private void checkIfValid() {
  if (false == this.validate()) {
   throw new RuntimeException("        ！");
  }
 }
 /**
  *    （     ）：
  * 
  *                S = Sum(Ai * Wi), i = 0...16 ，   17       ；
  * Ai:   i             Wi:   i         Wi: 7 9 10 5 8 4 2 1 6 3 7 9 10 5 8 4
  * 2;     Y = mod(S, 11)<             Y: 0 1 2 3 4 5 6 7 8 9 10    : 1 0 X 9
  * 8 7 6 5 4 3 2
  * 
  * @param cardNumber
  * @return
  */
 private static char calculateVerifyCode(CharSequence cardNumber) {
  int sum = 0;
  for (int i = 0; i < NEW_CARD_NUMBER_LENGTH - 1; i++) {
   char ch = cardNumber.charAt(i);
   sum += ((int) (ch - '0')) * VERIFY_CODE_WEIGHT[i];
  }
  return VERIFY_CODE[sum % 11];
 }
 /**
  *  15         18      

  * 15       18          ：

  * 1、15       ，"    "   2 ，       "19"，  20  

  * 2、15            。18     ，        17   
  * 
  * @param cardNumber
  * @return
  */
 private static String contertToNewCardNumber(String oldCardNumber) {
  StringBuilder buf = new StringBuilder(NEW_CARD_NUMBER_LENGTH);
  buf.append(oldCardNumber.substring(0, 6));
  buf.append("19");
  buf.append(oldCardNumber.substring(6));
  buf.append(CheckIdCard.calculateVerifyCode(buf));
  return buf.toString();
 }
}