java 身份证验证

import java.util.Calendar;
import java.util.GregorianCalendar;
import java.util.HashMap;
import java.util.Map;


public class IDCardUtil {
    public static void main(String[] args) {
        System.out.println(isIDCard(""));//填入身份证
    }
     private final static Map<Integer, String> zoneNum = new HashMap<Integer, String>();
        static {
            zoneNum.put(11, "北京");
            zoneNum.put(12, "天津");
            zoneNum.put(13, "河北");
            zoneNum.put(14, "山西");
            zoneNum.put(15, "内蒙古");
            zoneNum.put(21, "辽宁");
            zoneNum.put(22, "吉林");
            zoneNum.put(23, "黑龙江");
            zoneNum.put(31, "上海");
            zoneNum.put(32, "江苏");
            zoneNum.put(33, "浙江");
            zoneNum.put(34, "安徽");
            zoneNum.put(35, "福建");
            zoneNum.put(36, "江西");
            zoneNum.put(37, "山东");
            zoneNum.put(41, "河南");
            zoneNum.put(42, "湖北");
            zoneNum.put(43, "湖南");
            zoneNum.put(44, "广东");
            zoneNum.put(45, "广西");
            zoneNum.put(46, "海南");
            zoneNum.put(50, "重庆");
            zoneNum.put(51, "四川");
            zoneNum.put(52, "贵州");
            zoneNum.put(53, "云南");
            zoneNum.put(54, "西藏");
            zoneNum.put(61, "陕西");
            zoneNum.put(62, "甘肃");
            zoneNum.put(63, "青海");
            zoneNum.put(64, "新疆");
            zoneNum.put(71, "台湾");
            zoneNum.put(81, "香港");
            zoneNum.put(82, "澳门");
            zoneNum.put(91, "外国");
        }
        
        final static int[] PARITYBIT = {'1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2'};
        final static int[] POWER_LIST = { 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10,
            5, 8, 4, 2};
        
        /**
         * 身份证验证
         *@param certNo  号码内容
         *@return 是否有效 null和"" 都是false
         */
        public static boolean isIDCard(String certNo) {
            if (certNo == null || (certNo.length() != 15 && certNo.length() != 18))
                return false;
            final char[] cs = certNo.toUpperCase().toCharArray();
            //校验位数
            int power = 0;
            for (int i = 0; i < cs.length; i++) {
                if (i == cs.length - 1 && cs[i] == 'X')
                    break;//最后一位可以 是X或x
                if (cs[i] < '0' || cs[i] > '9')
                    return false;
                if (i < cs.length - 1) {
                    power += (cs[i] - '0') * POWER_LIST[i];
                }
            }
     
            //校验区位码
            if (!zoneNum.containsKey(Integer.valueOf(certNo.substring(0, 2)))) {
                return false;
            }
     
            //校验年份
            String year = certNo.length() == 15 ? getIdcardCalendar() + certNo.substring(6, 8) : certNo.substring(6, 10);
     
            final int iyear = Integer.parseInt(year);
            if (iyear < 1900 || iyear > Calendar.getInstance().get(Calendar.YEAR))
                return false;//1900年的PASS，超过今年的PASS
     
            //校验月份
            String month = certNo.length() == 15 ? certNo.substring(8, 10) : certNo.substring(10, 12);
            final int imonth = Integer.parseInt(month);
            if (imonth < 1 || imonth > 12) {
                return false;
            }
     
            //校验天数     
            String day = certNo.length() == 15 ? certNo.substring(10, 12) : certNo.substring(12, 14);
            final int iday = Integer.parseInt(day);
            if (iday < 1 || iday > 31)
                return false;
     
            //校验"校验码"
            return certNo.length() == 15 || cs[cs.length - 1] == PARITYBIT[power % 11];
        }
        
        private static int getIdcardCalendar() {       
             GregorianCalendar curDay = new GregorianCalendar();
             int curYear = curDay.get(Calendar.YEAR);
            return Integer.parseInt(String.valueOf(curYear).substring(2));
        }    
}

 

原文忘记是哪里的； 不好意思，如果原文作者看到联系一下；