Our ID card number contains a lot of information, the following code provides the ID card analysis function, see the comments for details, it has been written in full
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Scanner;
/**
* @author Rob Sivan
* @date 2022/9/19 20:30
* @describe 身份证解析工具类
*/
public class IDCardUtil {
public static void main(String[] args) {
//预获取身份证号码
System.out.println("请输入身份证号码：");
String SId = new Scanner(System.in).nextLine();
if (SId.length() == 15) {
SId = SIdConversion(SId);
}
if (SId.length() != 18) {
System.out.println("请输入有效的身份证号码！");
} else if (IDVerification(SId)) {
// 前六位表示地址码，精确到县
char[] areaCode = new char[6];
for (int i = 0; i < 6; i++) {
areaCode[i] = SId.charAt(i);
}
String area = new String(areaCode);
// 从身份证中获取出生年月日并转换为String
char[] birthDate = new char[8];
for (int i = 0; i < 8; i++) {
birthDate[i] = SId.charAt(i + 6);
}
//获取当前日期并转换为字符串
Date date = new Date();
SimpleDateFormat df = new SimpleDateFormat("yyyyMMdd");
String nowDate = df.format(date);
//根据二者转换出年龄
int age = (Integer.parseInt(nowDate) - Integer.parseInt(String.valueOf(birthDate))) / 10000;
StringBuilder sb = new StringBuilder(String.valueOf(birthDate));
sb.insert(4, "-");
sb.insert(7, "-");
String birth = sb.toString();
// 得到17位性别码
String gender = SId.charAt(16) % 2 == 1 ? "男" : "女";
// 执行输出方法
printInfo(area, birth, gender, age);
}
}
// 15位身份证转18位方法
public static String SIdConversionE(String SId) {
// 解析版
String sid;
// 前六位表示地址码，精确到县
char[] areaCode = new char[8];
for (int i = 0; i < 6; i++) {
areaCode[i] = SId.charAt(i);
}
String area = new String(areaCode);
// 第七到十二位为出生年月日，较18位身份证少了年的前两位
char[] birthDate = new char[8];
birthDate[0] = '1';
birthDate[1] = '9';
for (int i = 2; i < 8; i++) {
birthDate[i] = SId.charAt(i + 4);
}
String birth = new String(birthDate);
// 第十三到十四位
char[] otherNum = new char[2];
for (int i = 0; i < 2; i++) {
otherNum[i] = SId.charAt(i + 12);
}
String other = new String(otherNum);
// 第十五位性别
String gander = SId.substring(14);
// 通过最后三位得到此时的17位身份证
String SIdTemp = area + birth + other + gander;
// 将此时15+2=17位的身份证与对应加权位数字相乘并相加
final int[] WEIGHTING_FACTOR = {
7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2}; // 加权因子
int sum = 0;
for (int i = 0; i < 18; i++) {
int a = SIdTemp.charAt(i);
int b = WEIGHTING_FACTOR[i];
sum = sum + (a * b);
}
// 将和对11取模得到最后一位校验码
final String[] CHECK_CODE = {
"1", "0", "X", "9", "8", "7", "6", "5", "4", "3", "2"}; // 校验码
String check = CHECK_CODE[((sum / 11) - 1)];
// 17位身份证加上最后一位校验码得到18位身份证
sid = SIdTemp + check;
return sid;
}
public static String SIdConversion(String SId) {
StringBuilder sb = new StringBuilder(SId);
sb.insert(6, "19");
String s = sb.toString();
System.out.println(s);
final int[] WEIGHTING_FACTOR = {
7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2}; // 加权因子
int sum = 0;
for (int i = 0; i < 17; i++) {
int a = s.charAt(i) - 48;
int b = WEIGHTING_FACTOR[i];
sum += a * b;
}
System.out.println(sum);
int checkNum = sum % 11;
String[] CHECK_CODE = {
"1", "0", "X", "9", "8", "7", "6", "5", "4", "3", "2"}; // 校验码
return s + CHECK_CODE[checkNum];
}
// 验证身份证是否正确
public static boolean IDVerification(String SId) {
String check = SId.substring(17);
final int[] WEIGHTING_FACTOR = {
7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2}; // 加权因子
int sum = 0;
for (int i = 0; i < 17; i++) {
int a = SId.charAt(i) - 48;
int b = WEIGHTING_FACTOR[i];
sum += a * b;
}
int checkNum = sum % 11;
// System.out.println(checkNum);
final String[] CHECK_CODE = {
"1", "0", "X", "9", "8", "7", "6", "5", "4", "3", "2"}; // 校验码
return check.equals(CHECK_CODE[checkNum]);
}
// 输出方法
public static void printInfo(String area, String birth, String gender, int age) {
System.out.println("-----身份证ID解析成功！-----");
System.out.println("该身份证持有人的地区码为：" + area +
"\n出生日期为：" + birth +
"\n性别为" + gender +
"\n当前年龄为：" + age);
}
}
First, it will judge whether the input number satisfies 18 digits or 15 digits. If it is not satisfied, an exception will be thrown directly, and then the 15 digits will be converted to 18 digits. After cutting, the area code and birthday will be obtained, and the sex code will be used to determine the gender. Finally, the current date will be calculated through the birthday Age, the final output, the specific usage scenario will definitely not be called this way, it is mostly used after the ID number is obtained from the front-end, the back-end directly parses the user's information, directly stores it in the database, reduces user input, and can be fed back to the front-end part User information is used for display.
Well, that's all, mainly through thinking, Xiao Afan continued to slip~
