javascript随机生成一定位数的密码

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//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; jMath.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));