Java身份证号码校验工具类详解

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.regex.Pattern;

public class IdcardValidator1 {
 

  public static void main(String[] args) throws Exception { 
     
    String idcard15 = "142431199001145";//15位 
    String idcard18 = "121212121212121212";//18位 
    IdcardValidator1 iv = new IdcardValidator1(); 
    System.out.println(iv.isValidatedAllIdcard(idcard15)); 
    System.out.println(iv.isValidatedAllIdcard(idcard18)); 
    IdcardInfoExtractor ie = new IdcardInfoExtractor(idcard18); 
    System.out.println(ie.toString()); 
  } 
 
 
 /** 
   * 省，直辖市代码表： { 11:"北京",12:"天津",13:"河北",14:"山西",15:"内蒙古", 
   * 21:"辽宁",22:"吉林",23:"黑龙江",31:"上海",32:"江苏", 
   * 33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山东",41:"河南", 
   * 42:"湖北",43:"湖南",44:"广东",45:"广西",46:"海南",50:"重庆", 
   * 51:"四川",52:"贵州",53:"云南",54:"西藏",61:"陕西",62:"甘肃", 
   * 63:"青海",64:"宁夏",65:"新疆",71:"台湾",81:"香港",82:"澳门",91:"国外"} 
   */ 
  protected String codeAndCity[][] = { { "11", "北京" }, { "12", "天津" }, 
      { "13", "河北" }, { "14", "山西" }, { "15", "内蒙古" }, { "21", "辽宁" }, 
      { "22", "吉林" }, { "23", "黑龙江" }, { "31", "上海" }, { "32", "江苏" }, 
      { "33", "浙江" }, { "34", "安徽" }, { "35", "福建" }, { "36", "江西" }, 
      { "37", "山东" }, { "41", "河南" }, { "42", "湖北" }, { "43", "湖南" }, 
      { "44", "广东" }, { "45", "广西" }, { "46", "海南" }, { "50", "重庆" }, 
      { "51", "四川" }, { "52", "贵州" }, { "53", "云南" }, { "54", "西藏" }, 
      { "61", "陕西" }, { "62", "甘肃" }, { "63", "青海" }, { "64", "宁夏" }, 
      { "65", "新疆" }, { "71", "台湾" }, { "81", "香港" }, { "82", "澳门" }, 
      { "91", "国外" } }; 
 
  private String cityCode[] = { "11", "12", "13", "14", "15", "21", "22", 
      "23", "31", "32", "33", "34", "35", "36", "37", "41", "42", "43", 
      "44", "45", "46", "50", "51", "52", "53", "54", "61", "62", "63", 
      "64", "65", "71", "81", "82", "91" }; 
 
  // 每位加权因子 
  private int power[] = { 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2 }; 
 
  // 第18位校检码 
  private String verifyCode[] = { "1", "0", "X", "9", "8", "7", "6", "5", 
      "4", "3", "2" }; 
 
  /** 
   * 验证所有的SFZ的合法性 
   * 
   * @param idcard 
   * @return 
   */ 
  public boolean isValidatedAllIdcard(String idcard) { 
    if (idcard.length() == 15) { 
      idcard = this.convertIdcarBy15bit(idcard); 
    } 
    return this.isValidate18Idcard(idcard); 
  } 
 
  /** 
   * <p> 
   * 判断18位SFZ的合法性 
   * </p> 
   * 根据〖中华人民共和国国家标准GB11643-1999〗中有关公民身份号码的规定，公民身份号码是特征组合码，由十七位数字本体码和一位数字校验码组成。 
   * 排列顺序从左至右依次为：六位数字地址码，八位数字出生日期码，三位数字顺序码和一位数字校验码。 
   * <p> 
   * 顺序码: 表示在同一地址码所标识的区域范围内，对同年、同月、同 日出生的人编定的顺序号，顺序码的奇数分配给男性，偶数分配 给女性。 
   * </p> 
   * <p> 
   * 1.前1、2位数字表示：所在省份的代码； 2.第3、4位数字表示：所在城市的代码； 3.第5、6位数字表示：所在区县的代码； 
   * 4.第7~14位数字表示：出生年、月、日； 5.第15、16位数字表示：所在地的派出所的代码； 
   * 6.第17位数字表示性别：奇数表示男性，偶数表示女性； 
   * 7.第18位数字是校检码：也有的说是个人信息码，一般是随计算机的随机产生，用来检验SFZ的正确性。校检码可以是0~9的数字，有时也用x表示。 
   * </p> 
   * <p> 
   * 第十八位数字(校验码)的计算方法为： 1.将前面的SFZ号码17位数分别乘以不同的系数。从第一位到第十七位的系数分别为：7 9 10 5 8 4 
   * 2 1 6 3 7 9 10 5 8 4 2 
   * </p> 
   * <p> 
   * 2.将这17位数字和系数相乘的结果相加。 
   * </p> 
   * <p> 
   * 3.用加出来和除以11，看余数是多少？ 
   * </p> 
   * 4.余数只可能有0 1 2 3 4 5 6 7 8 9 10这11个数字。其分别对应的最后一位SFZ的号码为1 0 X 9 8 7 6 5 4 3 
   * 2。 
   * <p> 
   * 5.通过上面得知如果余数是2，就会在SFZ的第18位数字上出现罗马数字的Ⅹ。如果余数是10，SFZ的最后一位号码就是2。 
   * </p> 
   * 
   * @param idcard 
   * @return 
   */ 
  public boolean isValidate18Idcard(String idcard) { 
    // 非18位为假 
    if (idcard.length() != 18) { 
      return false; 
    } 
    // 获取前17位 
    String idcard17 = idcard.substring(0, 17); 
    // 获取第18位 
    String idcard18Code = idcard.substring(17, 18); 
    char c[] = null; 
    String checkCode = ""; 
    // 是否都为数字 
    if (isDigital(idcard17)) { 
      c = idcard17.toCharArray(); 
    } else { 
      return false; 
    } 
 
    if (null != c) { 
      int bit[] = new int[idcard17.length()]; 
 
      bit = converCharToInt(c); 
 
      int sum17 = 0; 
 
      sum17 = getPowerSum(bit); 
 
      // 将和值与11取模得到余数进行校验码判断 
      checkCode = getCheckCodeBySum(sum17); 
      if (null == checkCode) { 
        return false; 
      } 
      // 将SFZ的第18位与算出来的校码进行匹配，不相等就为假 
      if (!idcard18Code.equalsIgnoreCase(checkCode)) { 
        return false; 
      } 
    } 
    return true; 
  } 
 
  /** 
   * 验证15位SFZ的合法性,该方法验证不准确，最好是将15转为18位后再判断，该类中已提供。 
   * 
   * @param idcard 
   * @return 
   */ 
  public boolean isValidate15Idcard(String idcard) { 
    // 非15位为假 
    if (idcard.length() != 15) { 
      return false; 
    } 
 
    // 是否全都为数字 
    if (isDigital(idcard)) { 
      String provinceid = idcard.substring(0, 2); 
      String birthday = idcard.substring(6, 12); 
      int year = Integer.parseInt(idcard.substring(6, 8)); 
      int month = Integer.parseInt(idcard.substring(8, 10)); 
      int day = Integer.parseInt(idcard.substring(10, 12)); 
 
      // 判断是否为合法的省份 
      boolean flag = false; 
      for (String id : cityCode) { 
        if (id.equals(provinceid)) { 
          flag = true; 
          break; 
        } 
      } 
      if (!flag) { 
        return false; 
      } 
      // 该SFZ生出日期在当前日期之后时为假 
      Date birthdate = null; 
      try { 
        birthdate = new SimpleDateFormat("yyMMdd").parse(birthday); 
      } catch (ParseException e) { 
        e.printStackTrace(); 
      } 
      if (birthdate == null || new Date().before(birthdate)) { 
        return false; 
      } 
 
      // 判断是否为合法的年份 
      GregorianCalendar curDay = new GregorianCalendar(); 
      int curYear = curDay.get(Calendar.YEAR); 
      int year2bit = Integer.parseInt(String.valueOf(curYear) 
          .substring(2)); 
 
      // 判断该年份的两位表示法，小于50的和大于当前年份的，为假 
      if ((year < 50 && year > year2bit)) { 
        return false; 
      } 
 
      // 判断是否为合法的月份 
      if (month < 1 || month > 12) { 
        return false; 
      } 
 
      // 判断是否为合法的日期 
      boolean mflag = false; 
      curDay.setTime(birthdate); // 将该SFZ的出生日期赋于对象curDay 
      switch (month) { 
      case 1: 
      case 3: 
      case 5: 
      case 7: 
      case 8: 
      case 10: 
      case 12: 
        mflag = (day >= 1 && day <= 31); 
        break; 
      case 2: // 公历的2月非闰年有28天,闰年的2月是29天。 
        if (curDay.isLeapYear(curDay.get(Calendar.YEAR))) { 
          mflag = (day >= 1 && day <= 29); 
        } else { 
          mflag = (day >= 1 && day <= 28); 
        } 
        break; 
      case 4: 
      case 6: 
      case 9: 
      case 11: 
        mflag = (day >= 1 && day <= 30); 
        break; 
      } 
      if (!mflag) { 
        return false; 
      } 
    } else { 
      return false; 
    } 
    return true; 
  } 
 
  /** 
   * 将15位的SFZ转成18位SFZ 
   * 
   * @param idcard 
   * @return 
   */ 
  public String convertIdcarBy15bit(String idcard) { 
    String idcard17 = null; 
    // 非15位SFZ 
    if (idcard.length() != 15) { 
      return null; 
    } 
 
    if (isDigital(idcard)) { 
      // 获取出生年月日 
      String birthday = idcard.substring(6, 12); 
      Date birthdate = null; 
      try { 
        birthdate = new SimpleDateFormat("yyMMdd").parse(birthday); 
      } catch (ParseException e) { 
        e.printStackTrace(); 
      } 
      Calendar cday = Calendar.getInstance(); 
      cday.setTime(birthdate); 
      String year = String.valueOf(cday.get(Calendar.YEAR)); 
 
      idcard17 = idcard.substring(0, 6) + year + idcard.substring(8); 
 
      char c[] = idcard17.toCharArray(); 
      String checkCode = ""; 
 
      if (null != c) { 
        int bit[] = new int[idcard17.length()]; 
 
        // 将字符数组转为整型数组 
        bit = converCharToInt(c); 
        int sum17 = 0; 
        sum17 = getPowerSum(bit); 
 
        // 获取和值与11取模得到余数进行校验码 
        checkCode = getCheckCodeBySum(sum17); 
        // 获取不到校验位 
        if (null == checkCode) { 
          return null; 
        } 
 
        // 将前17位与第18位校验码拼接 
        idcard17 += checkCode; 
      } 
    } else { // SFZ包含数字 
      return null; 
    } 
    return idcard17; 
  } 
 
  /** 
   * 15位和18位SFZ号码的基本数字和位数验校 
   * 
   * @param idcard 
   * @return 
   */ 
  public boolean isIdcard(String idcard) { 
    return idcard == null || "".equals(idcard) ? false : Pattern.matches( 
        "(^\\d{15}$)|(\\d{17}(?:\\d|x|X)$)", idcard); 
  } 
 
  /** 
   * 15位SFZ号码的基本数字和位数验校 
   * 
   * @param idcard 
   * @return 
   */ 
  public boolean is15Idcard(String idcard) { 
    return idcard == null || "".equals(idcard) ? false : Pattern.matches( 
        "^[1-9]\\d{7}((0\\d)|(1[0-2]))(([0|1|2]\\d)|3[0-1])\\d{3}$", 
        idcard); 
  } 
 
  /** 
   * 18位SFZ号码的基本数字和位数验校 
   * 
   * @param idcard 
   * @return 
   */ 
  public boolean is18Idcard(String idcard) { 
    return Pattern 
        .matches( 
            "^[1-9]\\d{5}[1-9]\\d{3}((0\\d)|(1[0-2]))(([0|1|2]\\d)|3[0-1])\\d{3}([\\d|x|X]{1})$", 
            idcard); 
  } 
 
  /** 
   * 数字验证 
   * 
   * @param str 
   * @return 
   */ 
  public boolean isDigital(String str) { 
    return str == null || "".equals(str) ? false : str.matches("^[0-9]*$"); 
  } 
 
  /** 
   * 将SFZ的每位和对应位的加权因子相乘之后，再得到和值 
   * 
   * @param bit 
   * @return 
   */ 
  public int getPowerSum(int[] bit) { 
 
    int sum = 0; 
 
    if (power.length != bit.length) { 
      return sum; 
    } 
 
    for (int i = 0; i < bit.length; i++) { 
      for (int j = 0; j < power.length; j++) { 
        if (i == j) { 
          sum = sum + bit[i] * power[j]; 
        } 
      } 
    } 
    return sum; 
  } 
 
  /** 
   * 将和值与11取模得到余数进行校验码判断 
   * 
   * @param checkCode 
   * @param sum17 
   * @return 校验位 
   */ 
  public String getCheckCodeBySum(int sum17) { 
    String checkCode = null; 
    switch (sum17 % 11) { 
    case 10: 
      checkCode = "2"; 
      break; 
    case 9: 
      checkCode = "3"; 
      break; 
    case 8: 
      checkCode = "4"; 
      break; 
    case 7: 
      checkCode = "5"; 
      break; 
    case 6: 
      checkCode = "6"; 
      break; 
    case 5: 
      checkCode = "7"; 
      break; 
    case 4: 
      checkCode = "8"; 
      break; 
    case 3: 
      checkCode = "9"; 
      break; 
    case 2: 
      checkCode = "x"; 
      break; 
    case 1: 
      checkCode = "0"; 
      break; 
    case 0: 
      checkCode = "1"; 
      break; 
    } 
    return checkCode; 
  } 
 
  /** 
   * 将字符数组转为整型数组 
   * 
   * @param c 
   * @return 
   * @throws NumberFormatException 
   */ 
  public int[] converCharToInt(char[] c) throws NumberFormatException { 
    int[] a = new int[c.length]; 
    int k = 0; 
    for (char temp : c) { 
      a[k++] = Integer.parseInt(String.valueOf(temp)); 
    } 
    return a; 
  } 
 
}

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

public class IdcardInfoExtractor {
 
 
 public static void main(String[] args) { 
    String idcard = "342221199406205511"; 
    IdcardInfoExtractor ie = new IdcardInfoExtractor(idcard); 
    System.out.println(ie.toString()); 
  } 
 
 
 // 省份 
  private String province; 
  // 城市 
  private String city; 
  // 区县 
  private String region; 
  // 年份 
  private int year; 
  // 月份 
  private int month; 
  // 日期 
  private int day; 
  // 性别  1男 2女
  private int gender; 
  // 出生日期 
  private Date birthday; 
 
  private Map<String, String> cityCodeMap = new HashMap<String, String>() { 
    { 
      this.put("11", "北京"); 
      this.put("12", "天津"); 
      this.put("13", "河北"); 
      this.put("14", "山西"); 
      this.put("15", "内蒙古"); 
      this.put("21", "辽宁"); 
      this.put("22", "吉林"); 
      this.put("23", "黑龙江"); 
      this.put("31", "上海"); 
      this.put("32", "江苏"); 
      this.put("33", "浙江"); 
      this.put("34", "安徽"); 
      this.put("35", "福建"); 
      this.put("36", "江西"); 
      this.put("37", "山东"); 
      this.put("41", "河南"); 
      this.put("42", "湖北"); 
      this.put("43", "湖南"); 
      this.put("44", "广东"); 
      this.put("45", "广西"); 
      this.put("46", "海南"); 
      this.put("50", "重庆"); 
      this.put("51", "四川"); 
      this.put("52", "贵州"); 
      this.put("53", "云南"); 
      this.put("54", "西藏"); 
      this.put("61", "陕西"); 
      this.put("62", "甘肃"); 
      this.put("63", "青海"); 
      this.put("64", "宁夏"); 
      this.put("65", "新疆"); 
      this.put("71", "台湾"); 
      this.put("81", "香港"); 
      this.put("82", "澳门"); 
      this.put("91", "国外"); 
    } 
  }; 
 
  private IdcardValidator1 validator = null; 
 
  /** 
   * 通过构造方法初始化各个成员属性 
   */ 
  public IdcardInfoExtractor(String idcard) { 
    try { 
      validator = new IdcardValidator1(); 
      if (validator.isValidatedAllIdcard(idcard)) { 
        if (idcard.length() == 15) { 
          idcard = validator.convertIdcarBy15bit(idcard); 
        } 
        // 获取省份 
        String provinceId = idcard.substring(0, 2); 
        Set<String> key = this.cityCodeMap.keySet(); 
        for (String id : key) { 
          if (id.equals(provinceId)) { 
            this.province = this.cityCodeMap.get(id); 
            break; 
          } 
        } 
 
        // 获取性别 
        String id17 = idcard.substring(16, 17); 
        if (Integer.parseInt(id17) % 2 != 0) { 
          this.gender = 1; //男
        } else { 
          this.gender = 2; //女
        } 
 
        // 获取出生日期 
        String birthday = idcard.substring(6, 14); 
        Date birthdate = new SimpleDateFormat("yyyyMMdd") 
            .parse(birthday); 
        this.birthday = birthdate; 
        GregorianCalendar currentDay = new GregorianCalendar(); 
        currentDay.setTime(birthdate); 
        this.year = currentDay.get(Calendar.YEAR); 
        this.month = currentDay.get(Calendar.MONTH) + 1; 
        this.day = currentDay.get(Calendar.DAY_OF_MONTH); 
      } 
    } catch (Exception e) { 
      e.printStackTrace(); 
    } 
  } 
 
  /** 
   * @return the province 
   */ 
  public String getProvince() { 
    return province; 
  } 
 
  /** 
   * @return the city 
   */ 
  public String getCity() { 
    return city; 
  } 
 
  /** 
   * @return the region 
   */ 
  public String getRegion() { 
    return region; 
  } 
 
  /** 
   * @return the year 
   */ 
  public int getYear() { 
    return year; 
  } 
 
  /** 
   * @return the month 
   */ 
  public int getMonth() { 
    return month; 
  } 
 
  /** 
   * @return the day 
   */ 
  public int getDay() { 
    return day; 
  } 
 
  /** 
   * @return the gender 
   */ 
  public int getGender() { 
    return gender; 
  } 
 
  /** 
   * @return the birthday 
   */ 
  public Date getBirthday() { 
    return birthday; 
  } 
 
  @Override 
  public String toString() { 
    return "省份：" + this.province + ",性别：" + this.gender + ",出生日期：" 
        + this.birthday; 
  } 
}