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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 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. 返回类别: 教程 上一教程: Java的网络功能与编程 一 下一教程: 一个简朴的定时器应用： VarTimer (java) 您可以阅读与"根据IP找地址的java实现"相关的教程: · java中实现IP地址的各种表现形式之间的转变 · [j2se]利用JAVA获得IP地址的法子 · 利用JAVA完成域名和IP地址的转变 · 编写一个JAVA小程序取得IP地址 · JSP+JAVASCRIPT实现类似MSDN CSDN导航树效果 |
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