java ip地址转换为长整型
java ip地址转换为长整型；
public class Util {
/**
* 字符串ip转换为long
* @param 字符串ip
* @return
*/
public static long getStringIpToLong(String ip) {
String[] ips = ip.split("[.]");
long num = 16777216L*Long.parseLong(ips[0]) +
65536L*Long.parseLong(ips[1]) + 256*Long.parseLong(ips[2]) +
Long.parseLong(ips[3]);
return num;
}
/**
* 长整型ip转换为string
* @param long型ip
* @return
*/
public static String getLongIpToString(long ipLong) {
long mask[] = {0x000000FF,0x0000FF00,0x00FF0000,0xFF000000};
long num = 0;
StringBuffer ipInfo = new StringBuffer();
for(int i=0;i<4;i++){
num = (ipLong & mask[i])>>(i*8);
if(i>0) ipInfo.insert(0,".");
ipInfo.insert(0,Long.toString(num,10));
}
return ipInfo.toString();
}
}
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