Android 身份证号有效性校验工具类

package cn.aikongmeng.demo.utils;

import java.text.NumberFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Random;

/**
* Created by Arjun on 2017/4/25.
* 身份证有效性校验
*/

public class IdentityUtils {
//    位权值数组
private static byte[] Wi = new byte[17];
//    身份证前部分字符数
private static final byte fPart = 6;
//    身份证算法求模关键值
private static final byte fMod = 11;
//    旧身份证长度
private static final byte oldIDLen = 15;
//    新身份证长度
private static final byte newIDLen = 18;
//    新身份证年份标志
private static final String yearFlag = "19";
//    校验码串
private static final String CheckCode = "10X98765432";
//    最小的行政区划码
private static final int minCode = 150000;
//    最大的行政区划码
private static final int maxCode = 700000;
//    旧身份证号码
//    private String oldIDCard="";
//    新身份证号码
//    private String newIDCard="";
//    地区及编码

//private String Area[][2] =
private static void setWiBuffer() {
for (int i = 0; i < Wi.length; i++) {
int k = (int) Math.pow(2, (Wi.length - i));
Wi[i] = (byte) (k % fMod);
}
}

//获取新身份证的最后一位:检验位
private static String getCheckFlag(String idCard) {
int sum = 0;
//进行加权求和
for (int i = 0; i < 17; i++) {
sum += Integer.parseInt(idCard.substring(i, i + 1)) * Wi[i];
}
//取模运算，得到模值
byte iCode = (byte) (sum % fMod);
return CheckCode.substring(iCode, iCode + 1);
}

//判断串长度的合法性
private static boolean checkLength(final String idCard, boolean newIDFlag) {
boolean right = (idCard.length() == oldIDLen) || (idCard.length() == newIDLen);
newIDFlag = false;
if (right) {
newIDFlag = (idCard.length() == newIDLen);
}
return right;
}

//获取时间串
private static String getIDDate(final String idCard, boolean newIDFlag) {
String dateStr = "";
if (newIDFlag)
dateStr = idCard.substring(fPart, fPart + 8);
else
dateStr = yearFlag + idCard.substring(fPart, fPart + 6);
return dateStr;
}

//判断时间合法性
private static boolean checkDate(final String dateSource) {
String dateStr = dateSource.substring(0, 4) + "-" + dateSource.substring(4, 6) + "-" + dateSource.substring(6, 8);
System.out.println(dateStr);
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
try {
Date date = df.parse(dateStr);
return (date != null);
} catch (java.text.ParseException e) {
e.printStackTrace();
return false;
}
}

//旧身份证转换成新身份证号码
public static String getNewIDCard(final String oldIDCard) {
//初始化方法
IdentityUtils.setWiBuffer();
if (!checkIDCard(oldIDCard)) {
return oldIDCard;
}
String newIDCard = oldIDCard.substring(0, fPart);
newIDCard += yearFlag;
newIDCard += oldIDCard.substring(fPart, oldIDCard.length());
String ch = getCheckFlag(newIDCard);
newIDCard += ch;
return newIDCard;
}

//新身份证转换成旧身份证号码
public static String getOldIDCard(final String newIDCard) {
//初始化方法
IdentityUtils.setWiBuffer();
if (!checkIDCard(newIDCard)) {
return newIDCard;
}
String oldIDCard = newIDCard.substring(0, fPart) +
newIDCard.substring(fPart + yearFlag.length(), newIDCard.length() - 1);
return oldIDCard;
}

//判断身份证号码的合法性
public static boolean checkIDCard(final String idCard) {
//初始化方法
IdentityUtils.setWiBuffer();

int length = idCard.length();
boolean isNew;
if (length == oldIDLen) isNew = false;
else if (length == newIDLen) isNew = true;
else return false;

//String message = "";
if (!checkLength(idCard, isNew)) {
//message = "ID长度异常";
return false;
}
String idDate = getIDDate(idCard, isNew);
if (!checkDate(idDate)) {
//message = "ID时间异常";
return false;
}
if (isNew) {
String checkFlag = getCheckFlag(idCard);
String theFlag = idCard.substring(idCard.length() - 1, idCard.length());
if (!checkFlag.equals(theFlag)) {
//message = "新身份证校验位异常";
return false;
}
}
return true;
}

//获取一个随机的"伪"身份证号码
public static String getRandomIDCard(final boolean idNewID) {
//初始化方法
IdentityUtils.setWiBuffer();
Random ran = new Random();
String idCard = getAddressCode(ran) + getRandomDate(ran, idNewID) + getIDOrder(ran);
if (idNewID) {
String ch = getCheckFlag(idCard);
idCard += ch;
}
return idCard;
}

//产生随机的地区编码
private static String getAddressCode(Random ran) {
if (ran == null) {
return "";
} else {
int addrCode = minCode + ran.nextInt(maxCode - minCode);
return Integer.toString(addrCode);
}
}

//产生随机的出生日期
private static String getRandomDate(Random ran, boolean idNewID) {
// TODO Auto-generated method stub
if (ran == null) {
return "";
}
int year = 0;
if (idNewID) {
year = 1900 + ran.nextInt(2017 - 1900);
} else {
year = 1 + ran.nextInt(99);
}
int month = 1 + ran.nextInt(12);
int day = 0;
if (month == 2) {
day = 1 + ran.nextInt(28);
} else if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12) {
day = 1 + ran.nextInt(31);
} else {
day = 1 + ran.nextInt(30);
}
NumberFormat nf = NumberFormat.getIntegerInstance();
nf.setMaximumIntegerDigits(2);
nf.setMinimumIntegerDigits(2);
String dateStr = Integer.toString(year) + nf.format(month) + nf.format(day);
return dateStr;
}

//产生随机的序列号
private static String getIDOrder(Random ran) {
// TODO Auto-generated method stub
NumberFormat nf = NumberFormat.getIntegerInstance();
nf.setMaximumIntegerDigits(3);
nf.setMinimumIntegerDigits(3);
if (ran == null) {
return "";
} else {
int order = 1 + ran.nextInt(999);
return nf.format(order);
}
}

public IdentityUtils() {
setWiBuffer();
}

/**
* @param args
*/
public static void main(String[] args) {

boolean checkFlag = IdentityUtils.checkIDCard("512501197203035172");

System.out.println(checkFlag);

}
}