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Utility class to validate CPF and CNPJ document types. For CPF use isValidSsn and for CNPJ use isValidTfn. Added to repo https://github.com/adrianoluis/misc-tools
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public class DocumentUtil { | |
// CPF | |
private static final int[] WEIGHT_SSN = {11, 10, 9, 8, 7, 6, 5, 4, 3, 2}; | |
// CNPJ | |
private static final int[] WEIGHT_TFN = {6, 5, 4, 3, 2, 9, 8, 7, 6, 5, 4, 3, 2}; | |
private static int sum(int[] weight, char[] numbers, int length) { | |
if (length <= 0) return 0; | |
final int nIdx = length - 1; | |
final int wIdx = weight.length > numbers.length ? length : nIdx; | |
return (sum(weight, numbers, nIdx) + Character.getNumericValue(numbers[nIdx]) * weight[wIdx]); | |
} | |
private static int calculate(final String document, final int[] weight) { | |
final char[] numbers = document.toCharArray(); | |
int sum = sum(weight, numbers, numbers.length); | |
sum = 11 - (sum % 11); | |
return sum > 9 ? 0 : sum; | |
} | |
private static boolean check(String tfn, int length, int[] weight) { | |
final String number = tfn.substring(0, length); | |
final int digit1 = calculate(number, weight); | |
final int digit2 = calculate(number + digit1, weight); | |
return tfn.equals(number + digit1 + digit2); | |
} | |
/** | |
* Valida CPF | |
*/ | |
public static boolean isValidSsn(String ssn) { | |
if (ssn == null || !ssn.matches("\\d{11}") || ssn.matches(ssn.charAt(0) + "{11}")) return false; | |
return check(ssn, 9, WEIGHT_SSN); | |
} | |
/** | |
* Valida CNPJ | |
*/ | |
public static boolean isValidTfn(String tfn) { | |
if (tfn == null || !tfn.matches("\\d{14}")) return false; | |
return check(tfn, 12, WEIGHT_TFN); | |
} | |
} |
Passando pra deixar um SUPER obrigado!!!!!!!
Me salvou!
Eu também estou fazendo o curso do Prof. Nélio Alves lá na Udemy. Me ajudou e muito. Obrigado pelo código
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Passando pra agradecer tbm!