package com.shopping.test;import java.util.List;import java.util.Stack;import java.util.Vector;/** * 随机生成仿信用卡的会员号 * 20190819 */public class RandomCreditCardNumberGenerator {    public static final String[] VISA_PREFIX_LIST = new String[]{"4539",            "4556", "4916", "4532", "4929", "40240071", "4485", "4716", "4"};    public static final String[] MASTERCARD_PREFIX_LIST = new String[]{"51",            "52", "53", "54", "55"};    public static final String[] AMEX_PREFIX_LIST = new String[]{"34", "37"};    public static final String[] DISCOVER_PREFIX_LIST = new String[]{"6011"};    public static final String[] DINERS_PREFIX_LIST = new String[]{"300",            "301", "302", "303", "36", "38"};    public static final String[] ENROUTE_PREFIX_LIST = new String[]{"2014",            "2149"};    public static final String[] JCB_PREFIX_LIST = new String[]{"35"};    public static final String[] VOYAGER_PREFIX_LIST = new String[]{"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;    }    /**     * 生成卡号     * @param prefix 前缀     * @param length 卡号长度 13或者16位     */    static String completed_number(String prefix, int length) {        String ccnumber = prefix;        while (ccnumber.length() < (length - 1)) {            ccnumber += new Double(Math.floor(Math.random() * 10)).intValue();        }        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))));        }        int sum = 0;        int pos = 0;        Integer[] reversedCCnumber = reversedCCnumberList                .toArray(new Integer[reversedCCnumberList.size()]);        while (pos < length - 1) {            int odd = reversedCCnumber[pos] * 2;            if (odd > 9) {                odd -= 9;            }            sum += odd;            if (pos != (length - 2)) {                sum += reversedCCnumber[pos + 1];            }            pos += 2;        }        int checkdigit = new Double(                ((Math.floor(sum / 10) + 1) * 10 - sum) % 10).intValue();        ccnumber += checkdigit;        return ccnumber;    }    /**     * 信用卡号码     * @param prefixList 前缀的数组     * @param length 长度     * @param howMany 数量     * @return     */    public static String[] credit_card_number(String[] prefixList, int length, int howMany) {        Stack
       
         result = new Stack
        
         ();        for (int i = 0; i < howMany; i++) {            int randomArrayIndex = (int) Math.floor(Math.random() * prefixList.length);            String ccnumber = prefixList[randomArrayIndex];            result.push(completed_number(ccnumber, length));        }        return result.toArray(new String[result.size()]);    }    /**     * 生成一个卡号的数组     * @param howMany 卡号的数量     * @return String[] 数组     */    public static String[] 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 * 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[] args) {        int howMany = 500;        String[] creditcardnumbers = generateMasterCardNumbers(howMany);        for (int i = 0; i < creditcardnumbers.length; i++) {            System.out.println(creditcardnumbers[i]);        }    }}