将ip转为长整型

import scala.math.pow

def ipToLong(ip:String): Long= {
var addrArray = ip.split("\.")
var num: Long = 0
for (i <- 0 until addrArray.size) {
var power = 3 - i
num += ((addrArray(i).toInt % 256 * pow(256, power).toLong))
}
num
}