短网址

目前很多短信后面会有一个短网址,点击可以进入APP或者进入APP下载页面
下面是如何生成短网址和解析短网址

private static char[] charSet = “0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz”.toCharArray();

/** * 将10进制转化为62进制,给定长度,不足填充0  * @param length * @param number     * @return */public static String convertTo62(Long number,int length) {    Long rest = number;    Stack<Character> stack = new Stack<Character>();    StringBuilder result = new StringBuilder(0);    while (rest != 0) {        stack.add(charSet[new Long((rest - (rest / 62) * 62)).intValue()]);        rest = rest / 62;    }    for (; !stack.isEmpty();) {        result.append(stack.pop());    }    int result_length = result.length();      StringBuilder temp0 = new StringBuilder();      for(int i = 0; i < length - result_length; i++){          temp0.append('0');      }      return temp0.toString() + result.toString();}

window.onload = function() { //通过模板直接获取数据 var shortLink = document.getElementById("shortLink").innerText; var iosUrl = document.getElementById("iosUrl").innerText; var androidUrl = document.getElementById("androidUrl").innerText; window.location.href = shortLink; var flag = checkIOSorAndroid(); window.setTimeout(function() { if (flag == 0) { window.location.href = androidUrl;//打开app下载地址 } else if (flag == 1) { window.location.href = iosUrl;//打开app下载地址 } }, 2000) } function checkIOSorAndroid() { var u = navigator.userAgent; var isAndroid = u.indexOf('Android') > -1 || u.indexOf('Adr') > -1; //android终端 var isiOS = !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/); //ios终端 if (isAndroid) { return 0; } else if (isiOS) { return 1; } }