JS进制转换

二进制转十进制

var num1 = 1111;
var returnNum = parseInt(num1,2).toString(10);

console.log(returnNum)   //'15'

二进制转八进制

var num1 = 1111;
var returnNum = parseInt(num1,2).toString(8);

console.log(returnNum)   //'17'

二进制转十六进制

var num1 = 1111;
var returnNum = parseInt(num1,2).toString(16);

console.log(returnNum)   //'f'