当前位置导航:炫浪网>>网络学院>>网页制作>>JSP教程

根据IP找地址的java实现

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
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
/*
* 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
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
/*
* 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.


相关内容
赞助商链接