Java IP Address to Long ipToLong(String ipStr)

Description

Ip converted to type long.

License

Open Source License

Parameter

Parameter	Description
ipStr	string of ip

Return

ipLongArr[]

Declaration

public static long[] ipToLong(String ipStr) 

Method Source Code

//package com.java2s;

public class Main {
    /**/*  ww w  . j  a  va 2 s . c  o  m*/
     * Ip converted to type long.
     * 
     * @param ipStr
     *            string of ip
     * @return ipLongArr[]
     */
    public static long[] ipToLong(String ipStr) {
        long[] ipLongArr = new long[2];
        final int leftShift3 = 24;
        final int leftShift2 = 16;
        final int leftShift1 = 8;
        if (ipStr.indexOf(".") >= 0) {
            String[] ip = ipStr.split("\\.");
            ipLongArr[1] = (Long.parseLong(ip[0]) << leftShift3) + (Long.parseLong(ip[1]) << leftShift2)
                    + (Long.parseLong(ip[2]) << leftShift1) + Long.parseLong(ip[3]);
            ipLongArr[0] = 0;
        } else {
            return ipV6ToLong(ipStr);
        }
        return ipLongArr;
    }

    /**
     * string of IpV6 converted to long.
     * 
     * @param longip
     *            a ipv6 string
     * @return long[]
     */
    public static long[] ipV6ToLong(String longip) {
        String[] strings = expandShortNotation(longip).split(":");
        long[] longs = new long[strings.length];

        long high = 0L;
        long low = 0L;
        final int radix = 16;
        final int fieldSize = 4;
        for (int i = 0; i < strings.length; i++) {
            if (i >= 0 && i < fieldSize) {
                high |= (Long.parseLong(strings[i], radix) << ((longs.length - i - 1) * radix));
            } else {
                low |= (Long.parseLong(strings[i], radix) << ((longs.length - i - 1) * radix));
            }
        }
        longs[0] = high;
        if (longs.length > 1) {
            longs[1] = low;
        }
        return longs;
    }

    /**
     * The abbreviated IPv6 converted into a standard wording.
     * 
     * @param strIp
     *            ip string
     * @return ipv6String
     */
    public static String expandShortNotation(String strIp) {
        final String strDoubleColon = "::";
        final String strSingleColon = ":";
        final int allIpV6Colons = 7;
        int allColons = allIpV6Colons;
        if (!strIp.contains(strDoubleColon)) {
            return strIp;
        } else if (strIp.equals(strDoubleColon)) {
            return generateZeroes(allColons + 1);
        } else {
            final int numberOfColons = countOccurrences(strIp, ':');

            if (strIp.indexOf(".") >= 0) {
                allColons -= 1;
            }
            if (strIp.startsWith(strDoubleColon)) {
                return strIp.replace(strDoubleColon, generateZeroes((allColons + 2) - numberOfColons));
            } else if (strIp.endsWith(strDoubleColon)) {
                return strIp.replace(strDoubleColon,
                        strSingleColon + generateZeroes((allColons + 2) - numberOfColons));
            } else {
                return strIp.replace(strDoubleColon,
                        strSingleColon + generateZeroes((allColons + 2 - 1) - numberOfColons));
            }
        }
    }

    /**
     * Generated IPv6 address 0.
     * 
     * @param number
     *            from number to string
     * @return ipv6String
     */
    public static String generateZeroes(int number) {
        final StringBuilder builder = new StringBuilder();
        for (int i = 0; i < number; i++) {
            builder.append("0:");
        }

        return builder.toString();
    }

    /**
     * The record ipv6 address: Number of.
     * 
     * @param haystack
     *            the string
     * @param needle
     *            the split char
     * @return count
     */
    public static int countOccurrences(String haystack, char needle) {
        int count = 0;
        for (int i = 0; i < haystack.length(); i++) {
            if (haystack.charAt(i) == needle) {
                count++;
            }
        }
        return count;
    }
}

Related

1. ipToLong(String ip)
2. ipToLong(String ip)
3. ipToLong(String ip)
4. ipToLong(String ipAddress)
5. ipToLong(String ipAddress)
6. ipToLong(String sip)
7. ipToLong(String strIP)
8. ipv4(long ip)
9. ipV4AddressToLong(String ipAddress)