java算法之身份证号码验证

大家好，又见面了，我是全栈君。

调用时直接

new IDCard().verify(身份证id);就可以了

实现代码如下:

public class IDCard {
private String _codeError;
//wi =2(n-1)(mod 11)
final int[] wi = {7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2, 1};
// verify digit
final int[] vi = {1, 0, 'X', 9, 8, 7, 6, 5, 4, 3, 2};
private int[] ai = new int[18];
private static String[] _areaCode={"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"};
private static HashMap<String,Integer> dateMap;
private static HashMap<String,String> areaCodeMap;
static{
dateMap=new HashMap<String,Integer>();
dateMap.put("01",31);
dateMap.put("02",null);
dateMap.put("03",31);
dateMap.put("04",30);
dateMap.put("05",31);
dateMap.put("06",30);
dateMap.put("07",31);
dateMap.put("08",31);
dateMap.put("09",30);
dateMap.put("10",31);
dateMap.put("11",30);
dateMap.put("12",31);
areaCodeMap=new HashMap<String,String>();
for(String code:_areaCode){
areaCodeMap.put(code,null);
}
}
//验证身份证位数,15位和18位身份证
public boolean verifyLength(String code){
int length=code.length();
if(length==15 || length==18){
return true;
}else{
_codeError="错误：输入的身份证号不是15位和18位的";
return false;
}
}
//判断地区码
public boolean verifyAreaCode(String code){
String areaCode=code.substring(0,2);
//            Element child=  _areaCodeElement.getChild("_"+areaCode);
if(areaCodeMap.containsKey(areaCode)){
return true;
}else{
_codeError="错误：输入的身份证号的地区码(1-2位)["+areaCode+"]不符合中国行政区划分代码规定(GB/T2260-1999)";
return false;
}
}
//判断月份和日期
public boolean verifyBirthdayCode(String code){
//验证月份
String month=code.substring(10,12);
boolean isEighteenCode=(18==code.length());
if(!dateMap.containsKey(month)){
_codeError="错误：输入的身份证号"+(isEighteenCode?"(11-12位)":"(9-10位)")+"不存在["+month+"]月份,不符合要求(GB/T7408)";
return false;
}
//验证日期
String dayCode=code.substring(12,14);
Integer day=dateMap.get(month);
String yearCode=code.substring(6,10);
Integer year=Integer.valueOf(yearCode);
//非2月的情况
if(day!=null){
if(Integer.valueOf(dayCode)>day || Integer.valueOf(dayCode)<1){
_codeError="错误：输入的身份证号"+(isEighteenCode?"(13-14位)":"(11-13位)")+"["+dayCode+"]号不符合小月1-30天大月1-31天的规定(GB/T7408)";
return false;
}
}
//2月的情况
else{
//闰月的情况
if((year%4==0&&year%100!=0)||(year%400==0)){
if(Integer.valueOf(dayCode)>29 || Integer.valueOf(dayCode)<1){
_codeError="错误：输入的身份证号"+(isEighteenCode?"(13-14位)":"(11-13位)")+"["+dayCode+"]号在"+year+"闰年的情况下未符合1-29号的规定(GB/T7408)";
return false;
}
}
//非闰月的情况
else{
if (Integer.valueOf(dayCode) > 28 || Integer.valueOf(dayCode) < 1) {
_codeError="错误：输入的身份证号"+(isEighteenCode?"(13-14位)":"(11-13位)")+"["+dayCode+"]号在"+year+"平年的情况下未符合1-28号的规定(GB/T7408)";
return false;
}
}
}
return true;
}
//验证身份除了最后位其他的是否包含字母
public boolean containsAllNumber(String code) {
String str="";
if(code.length()==15){
str=code.substring(0,15);
}else if(code.length()==18){
str=code.substring(0,17);
}
char[] ch = str.toCharArray();
for (int i = 0; i < ch.length; i++) {
if (! (ch[i] >= '0' && ch[i] <= '9')) {
_codeError="错误：输入的身份证号第"+(i+1)+"位包含字母";
return false;
}
}
return true;
}
public String getCodeError(){
return _codeError;
}
//验证身份证
public boolean verify(String idcard) {
_codeError="";
//验证身份证位数,15位和18位身份证
if(!verifyLength(idcard)){
return false;
}
//验证身份除了最后位其他的是否包含字母
if(!containsAllNumber(idcard)){
return false;
}
//如果是15位的就转成18位的身份证
String eifhteencard="";
if (idcard.length() == 15) {
eifhteencard = uptoeighteen(idcard);
}else{
eifhteencard=idcard;
}
//验证身份证的地区码
if(!verifyAreaCode(eifhteencard)){
return false;
}
//判断月份和日期
if(!verifyBirthdayCode(eifhteencard)){
return false;
}
//验证18位校验码,校验码采用ISO 7064：1983，MOD 11-2 校验码系统
if(!verifyMOD(eifhteencard)){
return false;
}
return true;
}
//验证18位校验码,校验码采用ISO 7064：1983，MOD 11-2 校验码系统
public boolean verifyMOD(String code){
String verify = code.substring(17, 18);
if("x".equals(verify)){
code=code.replaceAll("x","X");
verify="X";
}
String verifyIndex=getVerify(code);
if (verify.equals(verifyIndex)) {
return true;
}
//            int x=17;
//            if(code.length()==15){
//                  x=14;
//            }
_codeError="错误：输入的身份证号最末尾的数字验证码错误";
return false;
}
//获得校验位
public String getVerify(String eightcardid) {
int remaining = 0;
if (eightcardid.length() == 18) {
eightcardid = eightcardid.substring(0, 17);
}
if (eightcardid.length() == 17) {
int sum = 0;
for (int i = 0; i < 17; i++) {
String k = eightcardid.substring(i, i + 1);
ai[i] = Integer.parseInt(k);
}
for (int i = 0; i < 17; i++) {
sum = sum + wi[i] * ai[i];
}
remaining = sum % 11;
}
return remaining == 2 ? "X" : String.valueOf(vi[remaining]);
}
//15位转18位身份证
public String uptoeighteen(String fifteencardid) {
String eightcardid = fifteencardid.substring(0, 6);
eightcardid = eightcardid + "19";
eightcardid = eightcardid + fifteencardid.substring(6, 15);
eightcardid = eightcardid + getVerify(eightcardid);
return eightcardid;
}

作者：jason0539

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博客：http://blog.csdn.net/jason0539（转载请说明出处）