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根据ip找地址的java实现,能将\t分隔的ip,地址格式(起始ip\t结束ip\t国家\t地区\n)转化为升序的二进制格式,通过二分查找能在50-150ms内找到对应ip的地址信息.
原始数据可用iplook生成. 代码:
iptool.java
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/*
* 创建日期 2004-10-23
*
*/
package starfire.proxy.ip;
import java.io.bufferedreader;
import java.io.dataoutputstream;
import java.io.file;
import java.io.fileinputstream;
import java.io.fileoutputstream;
import java.io.ioexception;
import java.io.inputstreamreader;
import java.io.randomaccessfile;
import java.net.inetaddress;
import java.net.unknownhostexception;
import java.util.arraylist;
import java.util.collections;
import java.util.comparator;
import java.util.hashmap;
import java.util.iterator;
import java.util.stringtokenizer;
/**
* 4|4|4|4|4#总纪录数|ip偏移量|索引偏移量|数据偏移量
* (4|4|2|2)*#起始ip|结束ip|国家索引|区域索引
* (2|4)*#2位索引,4位偏移量(指向对应country|local开始位置) (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;
}
}
}
ipfile ipfile = new ipfile();
ipfile.totalrecords = iplist.size();
ipfile.ipoffset = ipfile.header_size;
ipfile.indexoffset = ipfile.ipoffset + iplist.size()
* ipfile.ip_info_size;
ipfile.dataoffset = ipfile.indexoffset + map.size() * ipfile.index_size;
system.out.println("totalrecords:" + ipfile.totalrecords);
system.out.println("ipoffset:" + ipfile.ipoffset);
system.out.println("indexoffset:" + ipfile.indexoffset);
system.out.println("dataoffset:" + ipfile.dataoffset);
system.out.println("data size:" + map.size());
//system.out.println("total size:"+total);
out.writeint(ipfile.magic);
out.writeint(ipfile.totalrecords);
out.writeint(ipfile.ipoffset);
out.writeint(ipfile.indexoffset);
out.writeint(ipfile.dataoffset);
out.flush();
//排序
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);
}
});
//写ip信息
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();
//写索引信息
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();
//写country|local数据
//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();
in.close();
out.close();
system.out.println("used " + (system.currenttimemillis() – time) / 1000
+ " seconds");
}
public iptool(string datapath) throws ioexception {
this.datapath = datapath;
this.ipfile = new ipfile();
load(datapath);
}
void load(string datapath) throws ioexception {
file f = new file(datapath);
raf = new randomaccessfile(f, "r");
int magic = raf.readint();
if (magic != ipfile.magic) {
throw new ioexception("bad format,magic number not match");
}
ipfile.totalrecords = raf.readint();
ipfile.ipoffset = raf.readint();
ipfile.indexoffset = raf.readint();
ipfile.dataoffset = raf.readint();
ipfile.datacount = (ipfile.dataoffset – ipfile.indexoffset)
/ ipfile.index_size;
if (raf.length() < ipfile.dataoffset) {
throw new ioexception("bad format,length not match");
}
ipfile.ipcount = (ipfile.indexoffset – ipfile.ipoffset)
/ ipfile.ip_info_size;
ipfile.minip = int2long(raf.readint());
raf.seek(ipfile.indexoffset – ipfile.ip_info_size);
ipfile.maxip = int2long(raf.readint());
//system.out.println(ipfile.ipcount);
//fillinfo(0,mininfo);
//fillinfo(ipfile.ipcount-1,maxinfo);
}
private void fillinfo(int pos, ipinfo info) throws ioexception {
raf.seek(ipfile.ipoffset + pos * ipfile.ip_info_size + 8);
int ci = short2int(raf.readshort());
int li = short2int(raf.readshort());
raf.seek(ipfile.indexoffset + ci * ipfile.index_size + 2);
ci = raf.readint();
raf.seek(ipfile.indexoffset + li * ipfile.index_size + 2);
li = raf.readint();
long cl = int2long(ci);
long ll = int2long(li);
//system.out.println("ci=" + cl + " li=" + ll);
raf.seek(cl);
int ret = raf.read(buffer);
int i = 0;
for (; i < ret; i++) {
if (buffer[i] == 0) {
break;
}
}
info.setcountry(new string(buffer, 0, i));
raf.seek(ll);
ret = raf.read(buffer);
for (i = 0; i < ret; i++) {
if (buffer[i] == 0) {
break;
}
}
info.setlocal(new string(buffer, 0, i));
//system.out.println(ll+" length="+raf.length());
}
public synchronized ipinfo find(string ip) {
ipinfo info = new ipinfo();
info.setip(ip);
try {
//long time = system.currenttimemillis();
long ipnum = ip2long(ip);
int pos = -1;
if (ipnum == ipfile.minip) {
pos = 0;
} else if (ipnum == ipfile.maxip) {
pos = ipfile.ipcount – 1;
} else {
pos = find(0, ipfile.ipcount – 1, ipnum);
}
if (pos != -1) {
fillinfo(pos, info);
}
//system.out.println("time="+(system.currenttimemillis()-time));
} catch (unknownhostexception e) {
} catch (ioexception e) {
e.printstacktrace();
}
return info;
}
public int find(int start, int end, long target) throws ioexception {
if (start >= end) {
return -1;
}
int middle = (end + start) / 2;
raf.seek(ipfile.ipoffset + middle * ipfile.ip_info_size);
long i = int2long(raf.readint());
long j = int2long(raf.readint());
if (target >= i && target <= j) {
return middle;
}
if (target < i) {
end = middle;
} else {
start = middle;
}
return find(start, end, target);
}
public static long ip2long(string ip) throws unknownhostexception {
int ipnum = str2ip(ip);
return int2long(ipnum);
}
public static long int2long(int i) {
long l = i & 0x7fffffffl;
if (i < 0) {
l |= 0x080000000l;
}
return l;
}
public static int short2int(short s) {
int i = s & 0x7fff;
if (s < 0) {
s |= 0x08000;
}
return s;
}
protected void finalize() {
if (raf != null) {
try {
raf.close();
} catch (ioexception e) {
}
}
}
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;
}
ipinfo.java
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/*
* 创建日期 2004-10-23
*
*/
package starfire.proxy.ip;
/**
* @author starfire
*
*/
public class ipinfo {
private string ip;
private string country = "";
private string local = "";
/**
* @return 返回 country。
*/
public string getcountry() {
return country;
}
/**
* @param country 要设置的 country。
*/
public void setcountry(string country) {
this.country = country;
}
/**
* @return 返回 ip。
*/
public string getip() {
return ip;
}
/**
* @param ip 要设置的 ip。
*/
public void setip(string ip) {
this.ip = ip;
}
/**
* @return 返回 local。
*/
public string getlocal() {
return local;
}
/**
* @param local 要设置的 local。
*/
public void setlocal(string local) {
this.local = local;
}
}
用iptool的format(string datapath, string targetpath)可将原始数据文件转化为内部使用格式.
