通过身份证获取年龄值

package com.gson.util;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

/**
* 测试
* @author lenovo
*
*/
public class MyTest {

/**
*
* @param args
*/
public static void main(String[] args) {
int returnAge = getAgeByIdCard("4305811999011160XX");
System.out.println("returnAge="+returnAge);
}

/**
     * 根据身份编号获取年龄
     *
     * @param idCard
     *            身份编号
     * @return 年龄
     */
public static int getAgeByIdCard(String idCard) {
        int iAge = 0;
        if (idCard.length() == CHINA_ID_MIN_LENGTH) {
            idCard = conver15CardTo18(idCard);
        }
        String year = idCard.substring(6, 10);
        Calendar cal = Calendar.getInstance();
        int iCurrYear = cal.get(Calendar.YEAR);
        iAge = iCurrYear - Integer.valueOf(year);
        return iAge;
    }



/**
     * 将15位身份证号码转换为18位
     *
     * @param idCard
     *            15位身份编码
     * @return 18位身份编码
     */
    public static String conver15CardTo18(String idCard) {
        String idCard18 = "";
        if (idCard.length() != CHINA_ID_MIN_LENGTH) {
            return null;
        }
        if (isNum(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 cal = Calendar.getInstance();
            if (birthDate != null)
                cal.setTime(birthDate);
            // 获取出生年(完全表现形式,如：2010)
            String sYear = String.valueOf(cal.get(Calendar.YEAR));
            idCard18 = idCard.substring(0, 6) + sYear + idCard.substring(8);
            // 转换字符数组
            char[] cArr = idCard18.toCharArray();
            if (cArr != null) {
                int[] iCard = converCharToInt(cArr);
                int iSum17 = getPowerSum(iCard);
                // 获取校验位
                String sVal = getCheckCode18(iSum17);
                if (sVal.length() > 0) {
                    idCard18 += sVal;
                } else {
                    return null;
                }
            }
        } else {
            return null;
        }
        return idCard18;
    }
    /**
     * 数字验证
     *
     * @param val
     * @return 提取的数字。
     */
    public static boolean isNum(String val) {
        return val == null || "".equals(val) ? false : val.matches("^[0-9]*$");
    }
    /**
     * 将字符数组转换成数字数组
     *
     * @param ca
     *            字符数组
     * @return 数字数组
     */
    public static int[] converCharToInt(char[] ca) {
        int len = ca.length;
        int[] iArr = new int[len];
        try {
            for (int i = 0; i < len; i++) {
                iArr[i] = Integer.parseInt(String.valueOf(ca[i]));
            }
        } catch (NumberFormatException e) {
            e.printStackTrace();
        }
        return iArr;
    }
    /**
     * 将身份证的每位和对应位的加权因子相乘之后，再得到和值
     *
     * @param iArr
     * @return 身份证编码。
     */
    public static int getPowerSum(int[] iArr) {
        int iSum = 0;
        if (power.length == iArr.length) {
            for (int i = 0; i < iArr.length; i++) {
                for (int j = 0; j < power.length; j++) {
                    if (i == j) {
                        iSum = iSum + iArr[i] * power[j];
                    }
                }
            }
        }
        return iSum;
    }
   
    /**
     * 将power和值与11取模获得余数进行校验码判断
     *
     * @param iSum
     * @return 校验位
     */
    public static String getCheckCode18(int iSum) {
        String sCode = "";
        switch (iSum % 11) {
        case 10:
            sCode = "2";
            break;
        case 9:
            sCode = "3";
            break;
        case 8:
            sCode = "4";
            break;
        case 7:
            sCode = "5";
            break;
        case 6:
            sCode = "6";
            break;
        case 5:
            sCode = "7";
            break;
        case 4:
            sCode = "8";
            break;
        case 3:
            sCode = "9";
            break;
        case 2:
            sCode = "x";
            break;
        case 1:
            sCode = "0";
            break;
        case 0:
            sCode = "1";
            break;
        }
        return sCode;
    }
   
/** 中国公民身份证号码最小长度。 */
    public static final int CHINA_ID_MIN_LENGTH = 15;

    /** 中国公民身份证号码最大长度。 */
    public static final int CHINA_ID_MAX_LENGTH = 18;

    /** 省、直辖市代码表 */
    public static final 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 */
    public static final 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 */
    public static final String verifyCode[] = {
            "1", "0", "X", "9", "8", "7", "6", "5", "4", "3", "2"
    };
    /** 最低年限 */
    public static final int MIN = 1930;
    public static Map<String, String> cityCodes = new HashMap<String, String>();
    /** 台湾身份首字母对应数字 */
    public static Map<String, Integer> twFirstCode = new HashMap<String, Integer>();
    /** 香港身份首字母对应数字 */
    public static Map<String, Integer> hkFirstCode = new HashMap<String, Integer>();
    static {
        cityCodes.put("11", "北京");
        cityCodes.put("12", "天津");
        cityCodes.put("13", "河北");
        cityCodes.put("14", "山西");
        cityCodes.put("15", "内蒙古");
        cityCodes.put("21", "辽宁");
        cityCodes.put("22", "吉林");
        cityCodes.put("23", "黑龙江");
        cityCodes.put("31", "上海");
        cityCodes.put("32", "江苏");
        cityCodes.put("33", "浙江");
        cityCodes.put("34", "安徽");
        cityCodes.put("35", "福建");
        cityCodes.put("36", "江西");
        cityCodes.put("37", "山东");
        cityCodes.put("41", "河南");
        cityCodes.put("42", "湖北");
        cityCodes.put("43", "湖南");
        cityCodes.put("44", "广东");
        cityCodes.put("45", "广西");
        cityCodes.put("46", "海南");
        cityCodes.put("50", "重庆");
        cityCodes.put("51", "四川");
        cityCodes.put("52", "贵州");
        cityCodes.put("53", "云南");
        cityCodes.put("54", "西藏");
        cityCodes.put("61", "陕西");
        cityCodes.put("62", "甘肃");
        cityCodes.put("63", "青海");
        cityCodes.put("64", "宁夏");
        cityCodes.put("65", "新疆");
        cityCodes.put("71", "台湾");
        cityCodes.put("81", "香港");
        cityCodes.put("82", "澳门");
        cityCodes.put("91", "国外");
        twFirstCode.put("A", 10);
        twFirstCode.put("B", 11);
        twFirstCode.put("C", 12);
        twFirstCode.put("D", 13);
        twFirstCode.put("E", 14);
        twFirstCode.put("F", 15);
        twFirstCode.put("G", 16);
        twFirstCode.put("H", 17);
        twFirstCode.put("J", 18);
        twFirstCode.put("K", 19);
        twFirstCode.put("L", 20);
        twFirstCode.put("M", 21);
        twFirstCode.put("N", 22);
        twFirstCode.put("P", 23);
        twFirstCode.put("Q", 24);
        twFirstCode.put("R", 25);
        twFirstCode.put("S", 26);
        twFirstCode.put("T", 27);
        twFirstCode.put("U", 28);
        twFirstCode.put("V", 29);
        twFirstCode.put("X", 30);
        twFirstCode.put("Y", 31);
        twFirstCode.put("W", 32);
        twFirstCode.put("Z", 33);
        twFirstCode.put("I", 34);
        twFirstCode.put("O", 35);
        hkFirstCode.put("A", 1);
        hkFirstCode.put("B", 2);
        hkFirstCode.put("C", 3);
        hkFirstCode.put("R", 18);
        hkFirstCode.put("U", 21);
        hkFirstCode.put("Z", 26);
        hkFirstCode.put("X", 24);
        hkFirstCode.put("W", 23);
        hkFirstCode.put("O", 15);
        hkFirstCode.put("N", 14);
    }
}