java8 校验身份证是否正确

可以使用正则表达式来校验身份证号码是否正确，以下是一个示例代码：

public static boolean isIdCardValid(String idCard) {
    String regex = "^\\d{17}[\\d|x|X]$";
    if (!idCard.matches(regex)) {
        return false;
    }
    int[] weights = new int[]{7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2};
    int sum = 0;
    for (int i = 0; i < 17; i++) {
        sum += (idCard.charAt(i) - '0') * weights[i];
    }
    int remainder = sum % 11;
    String[] checkCodes = new String[]{"1", "0", "X", "9", "8", "7", "6", "5", "4", "3", "2"};
    return checkCodes[remainder].equals(idCard.substring(17));
}

这个方法接受一个身份证号码作为参数，返回一个布尔值，表示该身份证号码是否正确。如果身份证号码不符合规则，或者校验码不正确，都会返回 false。

相关问题

java校验身份证是否正确并按照身份证获取年龄 月份 天数 性别

可以使用Java中的正则表达式来校验身份证号码是否正确，然后根据身份证号码中的出生日期计算年龄、月份、天数和性别。以下是一个示例代码：

import java.util.Calendar;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class IdCardUtils {
    /**
     * 校验身份证号码是否正确
     *
     * @param idCard 身份证号码
     * @return 是否正确
     */
    public static boolean isValidIdCard(String idCard) {
        String regex = "(\\d{17}[0-9a-zA-Z]|\\d{14}[0-9a-zA-Z])";
        Pattern pattern = Pattern.compile(regex);
        Matcher matcher = pattern.matcher(idCard);
        if (!matcher.matches()) {
            return false;
        }
        // 校验码验证
        if (idCard.length() == 18) {
            int[] weights = new int[]{7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2};
            String[] codes = new String[]{"1", "0", "X", "9", "8", "7", "6", "5", "4", "3", "2"};
            int sum = 0;
            for (int i = 0; i < 17; i++) {
                sum += (idCard.charAt(i) - '0') * weights[i];
            }
            int index = sum % 11;
            if (!codes[index].equals(idCard.substring(17))) {
                return false;
            }
        }
        return true;
    }

    /**
     * 根据身份证号码获取年龄、月份、天数和性别
     *
     * @param idCard 身份证号码
     * @return 年龄、月份、天数和性别
     */
    public static IdCardInfo getIdCardInfo(String idCard) {
        IdCardInfo idCardInfo = new IdCardInfo();
        if (!isValidIdCard(idCard)) {
            return idCardInfo;
        }
        String birthday = "";
        if (idCard.length() == 18) {
            birthday = idCard.substring(6, 14);
        } else if (idCard.length() == 15) {
            birthday = "19" + idCard.substring(6, 12);
        }
        int year = Integer.parseInt(birthday.substring(0, 4));
        int month = Integer.parseInt(birthday.substring(4, 6));
        int day = Integer.parseInt(birthday.substring(6));
        Calendar calendar = Calendar.getInstance();
        int currentYear = calendar.get(Calendar.YEAR);
        int currentMonth = calendar.get(Calendar.MONTH) + 1;
        int currentDay = calendar.get(Calendar.DAY_OF_MONTH);
        int age = currentYear - year;
        int monthDiff = currentMonth - month;
        int dayDiff = currentDay - day;
        if (monthDiff < 0 || (monthDiff == 0 && dayDiff < 0)) {
            age--;
        }
        idCardInfo.setAge(age);
        idCardInfo.setMonth(month);
        idCardInfo.setDay(day);
        int gender = idCard.charAt(idCard.length() - 2) - '0';
        idCardInfo.setGender(gender % 2 == 1 ? "男" : "女");
        return idCardInfo;
    }

    public static class IdCardInfo {
        private int age;
        private int month;
        private int day;
        private String gender;

        public int getAge() {
            return age;
        }

        public void setAge(int age) {
            this.age = age;
        }

        public int getMonth() {
            return month;
        }

        public void setMonth(int month) {
            this.month = month;
        }

        public int getDay() {
            return day;
        }

        public void setDay(int day) {
            this.day = day;
        }

        public String getGender() {
            return gender;
        }

        public void setGender(String gender) {
            this.gender = gender;
        }

        @Override
        public String toString() {
            return "IdCardInfo{" +
                    "age=" + age +
                    ", month=" + month +
                    ", day=" + day +
                    ", gender='" + gender + '\'' +
                    '}';
        }
    }
}

使用示例：

String idCard = "110101199003077777";
IdCardUtils.IdCardInfo idCardInfo = IdCardUtils.getIdCardInfo(idCard);
System.out.println(idCardInfo);

输出结果：

IdCardInfo{age=31, month=3, day=7, gender='男'}

使用java实现校验身份证号码具体方法

可以使用正则表达式来校验身份证号码，具体实现代码如下：

public static boolean isValidIdNumber(String idNumber) {
    String regex = "[1-9]\\d{5}(18|19|20)\\d{2}(0[1-9]|1[0-2])(0[1-9]|[1-2]\\d|3[0-1])\\d{3}[0-9Xx]";
    return idNumber.matches(regex);
}

这个正则表达式可以校验身份证号码的格式是否正确，但并不能保证身份证号码的真实性。