身份证号码校验规则:
1、身份证号码是18位数,分别是17位数字和1位校验码。
具体含义分别是:6位地址码+8位出生日期+3位顺序码+1位校验码,校验码可能为字母
2、顺序码如果是奇数代表男性,偶数代表女性。
3、最后1位校验码是根据前17位数字算出来的
public final class IdCardUtil {
private IdCardUtil() {
}
// 身份证校验码
private static final int[] COEFFICIENT_ARRAY = {7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2};
// 身份证号的尾数规则
private static final String[] IDENTITY_MANTISSA = {"1", "0", "X", "9", "8", "7", "6", "5", "4", "3", "2"};
private static final String IDENTITY_PATTERN = "^[0-9]{17}[0-9Xx]$";
//校验身份证号是否合法
public static boolean isLegalPattern(String identity) {
if (identity == null || identity.length() != 18 || !identity.matches(IDENTITY_PATTERN)) {
return false;
}
char[] chars = identity.toCharArray();
long sum = IntStream.range(0, 17).map(index -> {
char ch = chars[index];
int digit = Character.digit(ch, 10);
int coefficient = COEFFICIENT_ARRAY[index];
return digit * coefficient;
}).summaryStatistics().getSum();
String mantissa = IDENTITY_MANTISSA[(int) (sum % 11)];
return identity.substring(17).equalsIgnoreCase(mantissa);
}
}