java验证身份证号码

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

/**
* 身份证号码验证工具类
* @author zhengchubin
* @date 2013-5-20 下午7:24:46
*/
public class IdcardUtil {
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 s
*      号码内容
*@return 是否有效 null和"" 都是false
*/
public static boolean isIdcard(String s){
if(s == null || (s.length() != 15 && s.length() != 18))
return false;
//校验区位码
if(!zoneNum.containsKey(Integer.valueOf(s.substring(0,2)))){
return false;
}

//校验年份
String year = s.length() == 15 ? "19" + s.substring(6,8) :s
.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 = s.length() == 15 ? s.substring(8, 10) : s.substring(10,12);
final int imonth = Integer.parseInt(month);
if(imonth <1 || imonth >12){
return false;
}

//校验天数

String day = s.length() ==15 ? s.substring(10, 12) : s.substring(12, 14);
final int iday = Integer.parseInt(day);
if(iday < 1 || iday > 31)
return false;

//校验一个合法的年月日
if(!validate(iyear, imonth, iday))
return false;

//校验"校验码"
if(s.length() == 15)
return true;
return true;
}

static boolean validate(int year, int imonth, int iday){
//比如考虑闰月，大小月等
return true;
}

public static void main(String[] args) {
final String s = "445224199112111x";
System.out.println(s+" --> "+isIdcard(s));
}
}