前言

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需求

随机生成一定位数的密码，有最小个数和最大个数，必须包含数字、大小写字母，和特殊字符比如（- _ #）；

代码

function createPassword(min,max) { //可以生成随机密码的相关数组 var num = ["0","1","2","3","4","5","6","7","8","9"]; var english = ["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"]; var ENGLISH = ["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"]; var special = ["-","_","#"]; var config = num.concat(english).concat(ENGLISH).concat(special); //先放入一个必须存在的 var arr = []; arr.push(getOne(num)); arr.push(getOne(english)); arr.push(getOne(ENGLISH)); arr.push(getOne(special)); //获取需要生成的长度 var len = min + Math.floor(Math.random()*(max-min+1)); for(var i=4; i<len; i++){ //从数组里面抽出一个 arr.push(config[Math.floor(Math.random()*config.length)]); } //乱序 var newArr = []; for(var j=0; j<len; j++){ newArr.push(arr.splice(Math.random()*arr.length,1)[0]); } //随机从数组中抽出一个数值 function getOne(arr) { return arr[Math.floor(Math.random()*arr.length)]; } return newArr.join(""); }

使用

传入一个生成的密码的最小位数，和最大位数，即可返回一个随机密码

console.log(createPassword(8,15));

总结

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