package com.yeshi.fanli.util;
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import java.math.BigDecimal;
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import java.math.BigInteger;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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/**
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* 口令工具
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*
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* @author Administrator
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*
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*/
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public class TokenUtil {
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private static String convert10To62(Long num) {
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String numbers = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
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BigDecimal numBig = new BigDecimal(num);
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int ge = numBig.divideAndRemainder(new BigDecimal(numbers.length()))[1].intValue();
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int n = 1;
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String result = "";
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result += numbers.charAt(ge);
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while (numBig.divideAndRemainder(new BigDecimal(numbers.length()).pow(n))[0].compareTo(new BigDecimal(0)) > 0) {
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int w = numBig.divideAndRemainder(new BigDecimal(numbers.length()).pow(n))[0]
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.divideAndRemainder(new BigDecimal(numbers.length()))[1].intValue();
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result = numbers.charAt(w) + result;
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n++;
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}
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return result;
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}
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/**
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* 生成口令
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*
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* @param id
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* @return
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*/
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public static String createToken(Long id) {// 生成口令
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long fid = 10000000000000L * ((int) (Math.random() * 1000) + 1) + id;
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return "&" + convert10To62(fid) + "&";
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}
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/**
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* 提取口令
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*
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* @param content
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* @return
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*/
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public static String parseToken(String content) {
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String regex = "&[A-Za-z0-9]{6,10}&";
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Pattern pattern = Pattern.compile(regex);
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String source = content;
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Matcher matcher = pattern.matcher(source);
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while (matcher.find()) {
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String result = matcher.group(0);
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return result;
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}
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return null;
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}
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}
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