原文：仿新浪微博 短链接地址生成工具 ShortUrlGenerator.java

源代码下载地址：http://www.zuidaima.com/share/1550463378934784.htm

仿新浪微博 短链接地址生成工具

ShortUrlGenerator.java

String sLongUrl = "http://www.zuidaima.com/share/1550463378934784.htm"; // 3BD768E58042156E54626860E241E999

String[] aResult = shortUrl(sLongUrl);

// 打印出结果

for (int i = 0; i < aResult.length; i++) {

          System.out.println("[" + i + "]:::" + aResult[i]);

}

/ 控制台输出如下： [0]:::7nUFJn [1]:::f6Zzy2 [2]:::j6jmQb [3]:::2eAjea

/**    Copyright 2012-2013 The Haohui Network Corporation*/
package com.zuidaima.haohui.common.utils;/*** @project baidamei* @author cevencheng <cevencheng@gmail.com> www.zuidaima.com* @create 2012-11-10 上午1:15:05*/
public class ShortUrlGenerator {/*** @param args*/public static void main(String[] args) {// 长连接： http://www.zuidaima.com/share/1550463378934784.htm// 新浪解析后的短链接为： http://t.cn/h1jGSCString sLongUrl = "http://www.zuidaima.com/share/1550463378934784.htm"; // 3BD768E58042156E54626860E241E999String[] aResult = shortUrl(sLongUrl);// 打印出结果for (int i = 0; i < aResult.length; i++) {System.out.println("[" + i + "]:::" + aResult[i]);}}public static String[] shortUrl(String url) {// 可以自定义生成 MD5 加密字符传前的混合 KEYString key = "wuguowei";// 要使用生成 URL 的字符String[] chars = new String[] { "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x","y", "z", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P","Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z"};// 对传入网址进行 MD5 加密
//		String sMD5EncryptResult = (new CMyEncrypt()).getMD5OfStr(key + url);String sMD5EncryptResult = MD5.md5Encode(key +  url);String hex = sMD5EncryptResult;String[] resUrl = new String[4];for (int i = 0; i < 4; i++) {// 把加密字符按照 8 位一组 16 进制与 0x3FFFFFFF 进行位与运算String sTempSubString = hex.substring(i * 8, i * 8 + 8);// 这里需要使用 long 型来转换，因为 Inteper .parseInt() 只能处理 31 位 , 首位为符号位 , 如果不用// long ，则会越界long lHexLong = 0x3FFFFFFF & Long.parseLong(sTempSubString, 16);String outChars = "";for (int j = 0; j < 6; j++) {// 把得到的值与 0x0000003D 进行位与运算，取得字符数组 chars 索引long index = 0x0000003D & lHexLong;// 把取得的字符相加outChars += chars[(int) index];// 每次循环按位右移 5 位lHexLong = lHexLong >> 5;}// 把字符串存入对应索引的输出数组resUrl[i] = outChars;}return resUrl;}
}