利用javascript如何随机生成一定位数的密码
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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