利用javascript如何隨機生成一定位數的密碼

2019-11-19 15:19:57

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前言

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需求

隨機生成一定位數的密碼，有最小個數和最大個數，必須包含數字、大小寫字母，和特殊字符比如（- _ #）；

代碼

function createPassword(min,max) { //可以生成隨機密碼的相關數組 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); //先放入一個必須存在的 var arr = []; arr.push(getOne(num)); arr.push(getOne(english)); arr.push(getOne(ENGLISH)); arr.push(getOne(special)); //獲取需要生成的長度 var len = min + Math.floor(Math.random()*(max-min+1)); for(var i=4; i<len; i++){  //從數組里面抽出一個  arr.push(config[Math.floor(Math.random()*config.length)]); } //亂序 var newArr = []; for(var j=0; j<len; j++){  newArr.push(arr.splice(Math.random()*arr.length,1)[0]); } //隨機從數組中抽出一個數值 function getOne(arr) {  return arr[Math.floor(Math.random()*arr.length)]; } return newArr.join(""); }

使用

傳入一個生成的密碼的最小位數，和最大位數，即可返回一個隨機密碼