Based on the IP address of the Java implementation, can be \ t-delimited IP, address format (beginning ip\t end of the ip\t country \ \ \ n) into an ascending binary format, through a binary lookup can be found in the 50-150MS IP address information.
Raw data can be generated iplook. Code:
/**
* 4|4|4|4|4# Total record number |ip Offset | index Offset | data offset
* (4|4|2|2) * #起始IP | end ip| Country Index | Zone index
* (2|4) * #2位索引, 4-bit offset (pointing to the corresponding country|local start position) (countrynull|localnull) *
*
* @author Starfire
*
*/
public class Iptool {
Private String DataPath;
Private Randomaccessfile RAF;
Private Ipfile ipfile;
Private byte[] buffer = new BYTE[40];
Private Ipinfo Mininfo = new Ipinfo ();
Private Ipinfo Maxinfo = new Ipinfo ();
public static int str2ip (String IP) throws unknownhostexception {
InetAddress address = inetaddress.getbyname (IP);
byte[] bytes = address.getaddress ();
int A, B, C, D;
A = Byte2int (Bytes[0]);
b = Byte2int (bytes[1]);
c = Byte2int (bytes[2]);
D = Byte2int (bytes[3]);
int result = (a << 24) | (b << 16) | (c << 8) | D
return result;
}
public static int Byte2int (byte b) {
int L = b & 0x07f;
if (b < 0) {
L |= 0x80;
}
return l;
}
public static void Format (string datapath, String TargetPath)
Throws IOException {
Long time = System.currenttimemillis ();
BufferedReader in = new BufferedReader (New InputStreamReader (
New FileInputStream (DataPath)));
FileOutputStream fos = new FileOutputStream (TargetPath);
DataOutputStream out = new DataOutputStream (FOS);
String Line;
ArrayList iplist = new ArrayList (150000);
HashMap map = new HashMap (65535);
ArrayList dataList = new ArrayList (65535);
Iterator iterator = null;
while (line = In.readline ())!= null) {
StringTokenizer token = new StringTokenizer (line, "T");
String start;
String end;
String Country;
String Local;
if (token.counttokens () = = 4) {
Start = Token.nexttoken ();
End = Token.nexttoken ();
Country = Token.nexttoken (). Trim ();
Local = Token.nexttoken ();
if (Local.startswith ("/")) {
Local = local.substring (1);
}
Local = Local.trim ();
try {
Iporigininfo info = new Iporigininfo ();
Info.startip = Str2ip (start);
Info.endip = Str2ip (end);
Info.country = country;
info.local = local;
Iplist.add (info);
Object obj = map.put (country, New Integer (Map.size ()));
if (obj!=null) {
Map.put (Country,obj);
}
else {
Datalist.add (country);
}
obj = map.put (local, New Integer (Map.size ()));
if (obj!=null) {
Map.put (Local,obj);
}
else {
Datalist.add (local);
}
catch (Unknownhostexception e) {
Continue
}
}
}
Sort
Collections.sort (IPList, New Comparator () {
public int Compare (object O1, Object O2) {
Iporigininfo info1 = (iporigininfo) O1;
Iporigininfo Info2 = (iporigininfo) O2;
Long start = Int2long (Info1.startip);
Long end = Int2long (Info2.startip);
return (int) (start-end);
}
});
Write IP information
iterator = Iplist.iterator ();
while (Iterator.hasnext ()) {
Iporigininfo info = (iporigininfo) iterator.next ();
Out.writeint (Info.startip);
Out.writeint (INFO.ENDIP);
Short S = ((Integer) Map.get (Info.country)). Shortvalue ();
Out.writeshort (s);
s = ((Integer) Map.get (info.local)). Shortvalue ();
Out.writeshort (s);
}
Out.flush ();
Write index information
int position = Ipfile.dataoffset;
int num = 0;
iterator = Datalist.iterator ();
while (Iterator.hasnext ()) {
String value = (string) iterator.next ();
Out.writeshort (num++);
Out.writeint (position);
if (Position > 2729877) {
System.err.println ("error:" + position);
}
Position + + value.getbytes (). length + 1;
}
Out.flush ();
Write country|local data
iterator = Sort.iterator ();
int size = Datalist.size ();
for (int i = 0; i < size; i++) {
String value = (string) datalist.get (i);
Out.write (Value.getbytes ());
Out.write ((byte) 0);
}
Out.flush ();
public static void Main (string[] args) throws Exception {
int ip = STR2IP ("192.168.0.1");
SYSTEM.OUT.PRINTLN (Ip2long (IP));
Format ("Ipdata.txt", "Result.dat");
Iptool tool = new Iptool ("Result.dat");
Ipinfo info = tool.find ("211.155.224.222");
System.out.println (Info.getcountry () + "" + info.getlocal ());
}
}
Class Iporigininfo {
public int startip;
public int EndIP;
Public String country;
public String Local;
}
Class Ipfile {
public static final int MAGIC = 0x05080321;
public static final int header_size = 20;
public static final int ip_info_size = 12;
public static final int index_size = 6;
Public final int magic = magic;
public int totalrecords;
public int ipoffset = header_size;
public int indexoffset;
public int dataoffset;
int datacount;
int ipcount;
Long Minip;
Long Maxip;
}
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