Zi 字媒體
2017-07-25T20:27:27+00:00
C# IP位址與數位（長整數）之間的轉換(參考JAVA 改過來的)
資料來源: http://www.iteye.com/topic/254742
https://github.com/jash-git/CS-IP-Int64-Conversion-
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace CS_IP_Long
{
/*
JAVA code-http://www.iteye.com/topic/254742
public static long ip2long(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;
}
public static String long2ip(long ipLong) {
//long ipLong = 1037591503;
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();
}
*/
class Program
{
public static Int64 ip2long(String ip)
{
String[] ips = ip.Split(‘.‘);
Int64 num = 16777216L * Convert.ToInt64(ips[0], 10) + 65536L * Convert.ToInt64(ips[1], 10) + 256 * Convert.ToInt64(ips[2], 10) + Convert.ToInt64(ips[3], 10);
return num;
}
public static String long2ip(Int64 ipLong)
{
//long ipLong = 1037591503;
Int64[] mask = new Int64[] { 0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000 };
Int64 num = 0;
string Buf = ““;
for(int i=0;i<4;i++){
num = (ipLong & mask[i])>>(i*8);
Buf = “.“+num + Buf;
}
return Buf.Substring(1);
}
public static void pause()
{
Console.Write(“Press any key to continue . . . “);
Console.ReadKey(true);
}
static void Main(string[] args)
{
Int64 val01 = ip2long(“1.2.3.4“);
String Str01 = long2ip(val01);
Int64 val02 = ip2long(“1.2.3.10“);
String Str02 = long2ip(val02);
Int64 val03 = ip2long(“192.168.0.5“);
String Str03 = long2ip(val03);
//–
String Str04 = long2ip(3439438016);//驗證API數字
Int64 val04 = ip2long(Str04);
pause();
}
}
}
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