JavaScript:ip与Integer转换

function ipToNumber(ip) { var ips = 0, numbers = ip.split("."); // return parseInt(numbers[0])*256*256*256 + // parseInt(numbers[1])*256*256 + // parseInt(numbers[2])*256 + // parseInt(numbers[3]); //等价上面 for (var i = 0; i < 4; ++i) { ips = ips << 8 | parseInt(numbers[i]); } return ips; } function numberToIp(number) { // return (Math.floor(number/(256*256*256))) + "." + // (Math.floor(number%(256*256*256)/(256*256))) + "." + // (Math.floor(number%(256*256)/256)) + "." + // (Math.floor(number%6)); //等价上面 var ip = []; for (var i = 3; i >= 0; i--) { ip[i] = number & 0xff; number = number >> 8; } return ip.join("."); }