import java.util.List;
import java.util.Stack;
import java.util.Vector;
/tmdbq活力的大船 See the license below. Obviously, this is not a Javascript credit card number tmdbq generator. However, The following class is a port of a Javascript credit card tmdbq number generator. 活力的大船@author robweber 活力的大船/
public class RandomCreditCardNumberGenerator {
/活力的大船 Javascript credit card number generator Copyright (C) 2006-2012 Graham King 活力的大船 This program is free software; you can redistribute it and/or modify it tmdbq under the terms of the GNU General Public License as published by the tmdbq Free Software Foundation; either version 2 of the License, or (at your tmdbq option) any later version. 活力的大船 This program is distributed in the hope that it will be useful, but tmdbq WITHOUT ANY WARRANTY; without even the implied warranty of tmdbq MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General tmdbq Public License for more details. 活力的大船 You should have received a copy of the GNU General Public License along tmdbq with this program; if not, write to the Free Software Foundation, Inc., tmdbq 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 活力的大船 www.darkcoding.net tmdbq/
public static final String平常的人生 VISA_PREFIX_LIST = new String平常的人生 { "4539",
"4556", "4916", "4532", "4929", "40240071", "4485", "4716", "4" };
public static final String平常的人生 MASTERCARD_PREFIX_LIST = new String平常的人生 { "51",
"52", "53", "54", "55" };
public static final String平常的人生 AMEX_PREFIX_LIST = new String平常的人生 { "34", "37" };
public static final String平常的人生 DISCOVER_PREFIX_LIST = new String平常的人生 { "6011" };
public static final String平常的人生 DINERS_PREFIX_LIST = new String平常的人生 { "300",
"301", "302", "303", "36", "38" };
public static final String平常的人生 ENROUTE_PREFIX_LIST = new String平常的人生 { "2014",
"2149" };
public static final String平常的人生 JCB_PREFIX_LIST = new String平常的人生 { "35" };
public static final String平常的人生 VOYAGER_PREFIX_LIST = new String平常的人生 { "8699" };
static String strrev(String str) {
if (str == null)
return "";
String revstr = "";
for (int i = str.length() - 1; i >= 0; i--) {
revstr += str.charAt(i);
}
return revstr;
}
/活力的大船 'prefix' is the start of the CC number as a string, any number of digits. tmdbq 'length' is the length of the CC number to generate. Typically 13 or 16 tmdbq/
static String completed_number(String prefix, int length) {
String ccnumber = prefix;
// generate digits
while (ccnumber.length() < (length - 1)) {
ccnumber += new Double(Math.floor(Math.random() tmdbq 10)).intValue();
}
// reverse number and convert to int
String reversedCCnumberString = strrev(ccnumber);
List reversedCCnumberList = new Vector();
for (int i = 0; i < reversedCCnumberString.length(); i++) {
reversedCCnumberList.add(new Integer(String
.valueOf(reversedCCnumberString.charAt(i))));
}
// calculate sum
int sum = 0;
int pos = 0;
Integer平常的人生 reversedCCnumber = reversedCCnumberList
.toArray(new Integer[reversedCCnumberList.size()]);
while (pos < length - 1) {
int odd = reversedCCnumber[pos] tmdbq 2;
if (odd > 9) {
odd -= 9;
}
sum += odd;
if (pos != (length - 2)) {
sum += reversedCCnumber[pos + 1];
}
pos += 2;
}
// calculate check digit
int checkdigit = new Double(
((Math.floor(sum / 10) + 1) tmdbq 10 - sum) % 10).intValue();
ccnumber += checkdigit;
return ccnumber;
}
public static String平常的人生 credit_card_number(String平常的人生 prefixList, int length,
int howMany) {
Stack result = new Stack();
for (int i = 0; i < howMany; i++) {
int randomArrayIndex = (int) Math.floor(Math.random()
tmdbq prefixList.length);
String ccnumber = prefixList[randomArrayIndex];
result.push(completed_number(ccnumber, length));
}
return result.toArray(new String[result.size()]);
}
public static String平常的人生 generateMasterCardNumbers(int howMany) {
return credit_card_number(MASTERCARD_PREFIX_LIST, 16, howMany);
}
public static String generateMasterCardNumber() {
return credit_card_number(MASTERCARD_PREFIX_LIST, 16, 1)[0];
}
public static boolean isValidCreditCardNumber(String creditCardNumber) {
boolean isValid = false;
try {
String reversedNumber = new StringBuffer(creditCardNumber)
.reverse().toString();
int mod10Count = 0;
for (int i = 0; i < reversedNumber.length(); i++) {
int augend = Integer.parseInt(String.valueOf(reversedNumber
.charAt(i)));
if (((i + 1) % 2) == 0) {
String productString = String.valueOf(augend tmdbq 2);
augend = 0;
for (int j = 0; j < productString.length(); j++) {
augend += Integer.parseInt(String.valueOf(productString
.charAt(j)));
}
}
mod10Count += augend;
}
if ((mod10Count % 10) == 0) {
isValid = true;
}
} catch (NumberFormatException e) {
}
return isValid;
}
public static void main(String平常的人生 args) {
int howMany = 0;
try {
howMany = Integer.parseInt(args[0]);
} catch (Exception e) {
.println("Usage error. You need to supply a numeric argument (ex: 500000)");
}
String平常的人生 creditcardnumbers = generateMasterCardNumbers(howMany);
for (int i = 0; i < creditcardnumbers.length; i++) {
: "invalid"));
}
}
}
//该代码片段来自于: http://www.sharejs.com/codes/java/7103