LumaQQ与IP查询二（转）
陈业
下面是改进了一点点的版本：
1 IPSeeker.java
package com.worthtech.app.util.ip;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.ByteOrder;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
import java.util.ArrayList;
import java.util.Hashtable;
import java.util.List;
/**
* <pre>
* 用来读取QQwry.dat文件，以根据ip获得好友位置，QQwry.dat的格式是
* 一. 文件头，共8字节
* 1. 第一个起始IP的绝对偏移， 4字节
* 2. 最后一个起始IP的绝对偏移， 4字节
* 二. "结束地址/国家/区域"记录区
* 四字节ip地址后跟的每一条记录分成两个部分
* 1. 国家记录
* 2. 地区记录
* 但是地区记录是不一定有的。而且国家记录和地区记录都有两种形式
* 1. 以0结束的字符串
* 2. 4个字节，一个字节可能为0x1或0x2
* a. 为0x1时，表示在绝对偏移后还跟着一个区域的记录，注意是绝对偏移之后，而不是这四个字节之后
* b. 为0x2时，表示在绝对偏移后没有区域记录
* 不管为0x1还是0x2，后三个字节都是实际国家名的文件内绝对偏移
* 如果是地区记录，0x1和0x2的含义不明，但是如果出现这两个字节，也肯定是跟着3个字节偏移，如果不是
* 则为0结尾字符串
* 三. "起始地址/结束地址偏移"记录区
* 1. 每条记录7字节，按照起始地址从小到大排列
* a. 起始IP地址，4字节
* b. 结束ip地址的绝对偏移，3字节
*
* 注意，这个文件里的ip地址和所有的偏移量均采用little-endian格式，而java是采用
* big-endian格式的，要注意转换
* </pre>
*
* @author 马若劼
*/
public class IPSeeker {
/**
* <pre>
* 用来封装ip相关信息，目前只有两个字段，ip所在的国家和地区
* </pre>
*
* @author 马若劼
*/
private class IPLocation {
public String country;
public String area;
public IPLocation() {
country = area = "";
}
public IPLocation getCopy() {
IPLocation ret = new IPLocation();
ret.country = country;
ret.area = area;
return ret;
}
}
private static final String IP_FILE = IPSeeker.class.getResource(
"qqwry.dat").toString().substring(5);
// 一些固定常量，比如记录长度等等
private static final int IP_RECORD_LENGTH = 7;
private static final byte AREA_FOLLOWED = 0x01;
private static final byte NO_AREA = 0x2;
// 用来做为cache，查询一个ip时首先查看cache，以减少不必要的重复查找
private final Hashtable ipCache;
// 随机文件访问类
private RandomAccessFile ipFile;
// 内存映射文件
private MappedByteBuffer mbb;
// 单一模式实例
private static IPSeeker instance = new IPSeeker();
// 起始地区的开始和结束的绝对偏移
private long ipBegin, ipEnd;
// 为提高效率而采用的临时变量
private final IPLocation loc;
// private final byte[] buf;//不需要了
private final byte[] b4;
private final byte[] b3;
/**
* 私有构造函数
*/
private IPSeeker() {
ipCache = new Hashtable();
loc = new IPLocation();
// buf = new byte[100];//不需要了，这里初始化不好!
b4 = new byte[4];
b3 = new byte[3];
try {
ipFile = new RandomAccessFile(IP_FILE, "r");
} catch (FileNotFoundException e) {
System.out.println(IPSeeker.class.getResource("QQWry.dat").toString());
System.out.println(IP_FILE);
System.out.println("IP地址信息文件没有找到，IP显示功能将无法使用");
ipFile = null;
}
// 如果打开文件成功，读取文件头信息
if (ipFile != null) {
try {
ipBegin = readLong4(0);
ipEnd = readLong4(4);
if (ipBegin == -1 || ipEnd == -1) {
ipFile.close();
ipFile = null;
}
} catch (IOException e) {
System.out.println("IP地址信息文件格式有错误，IP显示功能将无法使用");
ipFile = null;
}
}
}
/**
* @return 单一实例
*/
public static IPSeeker getInstance() {
return instance;
}
/**
* 给定一个地点的不完全名字，得到一系列包含s子串的IP范围记录
*
* @param s
* 地点子串
* @return 包含IPEntry类型的List
*/
public List getIPEntriesDebug(String s) {
List ret = new ArrayList();
long endOffset = ipEnd + 4;
for (long offset = ipBegin + 4; offset <= endOffset; offset += IP_RECORD_LENGTH) {
// 读取结束IP偏移
long temp = readLong3(offset);
// 如果temp不等于-1，读取IP的地点信息
if (temp != -1) {
IPLocation loc = getIPLocation(temp);
// 判断是否这个地点里面包含了s子串，如果包含了，添加这个记录到List中，如果没有，继续
if (loc.country.indexOf(s) != -1 || loc.area.indexOf(s) != -1) {
IPEntry entry = new IPEntry();
entry.country = loc.country;
entry.area = loc.area;
// 得到起始IP
readIP(offset - 4, b4);
entry.beginIp = Util.getIpStringFromBytes(b4);
// 得到结束IP
readIP(temp, b4);
entry.endIp = Util.getIpStringFromBytes(b4);
// 添加该记录
ret.add(entry);
}
}
}
return ret;
}
/**
* 给定一个地点的不完全名字，得到一系列包含s子串的IP范围记录
*
* @param s
* 地点子串
* @return 包含IPEntry类型的List
*/
public List getIPEntries(String s) {
List ret = new ArrayList();
try {
// 映射IP信息文件到内存中
if (mbb == null) {
FileChannel fc = ipFile.getChannel();
mbb = fc.map(FileChannel.MapMode.READ_ONLY, 0, ipFile.length());
mbb.order(ByteOrder.LITTLE_ENDIAN);
}
int endOffset = (int) ipEnd;
for (int offset = (int) ipBegin + 4; offset <= endOffset; offset += IP_RECORD_LENGTH) {
int temp = readInt3(offset);
if (temp != -1) {
IPLocation loc = getIPLocation(temp);
// 判断是否这个地点里面包含了s子串，如果包含了，添加这个记录到List中，如果没有，继续
if (loc.country.indexOf(s) != -1
|| loc.area.indexOf(s) != -1) {
IPEntry entry = new IPEntry();
entry.country = loc.country;
entry.area = loc.area;
// 得到起始IP
readIP(offset - 4, b4);
entry.beginIp = Util.getIpStringFromBytes(b4);
// 得到结束IP
readIP(temp, b4);
entry.endIp = Util.getIpStringFromBytes(b4);
// 添加该记录
ret.add(entry);
}
}
}
} catch (IOException e) {
System.out.println(e.getMessage());
}
return ret;
}
/**
* 从内存映射文件的offset位置开始的3个字节读取一个int
*
* @param offset
* @return
*/
private int readInt3(int offset) {
mbb.position(offset);
return mbb.getInt() & 0x00FFFFFF;
}
/**
* 从内存映射文件的当前位置开始的3个字节读取一个int
*
* @return
*/
private int readInt3() {
return mbb.getInt() & 0x00FFFFFF;
}
/**
* 根据IP得到国家名
*
* @param ip
* ip的字节数组形式
* @return 国家名字符串
*/
public String getCountry(byte[] ip) {
// 检查ip地址文件是否正常
if (ipFile == null)
return "错误的IP数据库文件";
// 保存ip，转换ip字节数组为字符串形式
String ipStr = Util.getIpStringFromBytes(ip);
// 先检查cache中是否已经包含有这个ip的结果，没有再搜索文件
if (ipCache.containsKey(ipStr)) {
IPLocation loc = (IPLocation) ipCache.get(ipStr);
return loc.country;
} else {
IPLocation loc = getIPLocation(ip);
ipCache.put(ipStr, loc.getCopy());
return loc.country;
}
}
/**
* 根据IP得到国家名
*
* @param ip
* IP的字符串形式
* @return 国家名字符串
*/
public String getCountry(String ip) {
return getCountry(Util.getIpByteArrayFromString(ip));
}
/**
* 根据IP得到地区名
*
* @param ip
* ip的字节数组形式
* @return 地区名字符串
*/
public String getArea(byte[] ip) {
// 检查ip地址文件是否正常
if (ipFile == null)
return "错误的IP数据库文件";
// 保存ip，转换ip字节数组为字符串形式
String ipStr = Util.getIpStringFromBytes(ip);
// 先检查cache中是否已经包含有这个ip的结果，没有再搜索文件
if (ipCache.containsKey(ipStr)) {
IPLocation loc = (IPLocation) ipCache.get(ipStr);
return loc.area;
} else {
IPLocation loc = getIPLocation(ip);
ipCache.put(ipStr, loc.getCopy());
return loc.area;
}
}
/**
* 根据IP得到地区名
*
* @param ip
* IP的字符串形式
* @return 地区名字符串
*/
public String getArea(String ip) {
return getArea(Util.getIpByteArrayFromString(ip));
}
/**
* 根据ip搜索ip信息文件，得到IPLocation结构，所搜索的ip参数从类成员ip中得到
*
* @param ip
* 要查询的IP
* @return IPLocation结构
*/
private IPLocation getIPLocation(byte[] ip) {
IPLocation info = null;
long offset = locateIP(ip);
if (offset != -1)
info = getIPLocation(offset);
if (info == null) {
info = new IPLocation();
info.country = "未知国家";
info.area = "未知地区";
}
return info;
}
/**
* 从offset位置读取4个字节为一个long，因为java为big-endian格式，所以没办法 用了这么一个函数来做转换
*
* @param offset
* @return 读取的long值，返回-1表示读取文件失败
*/
private long readLong4(long offset) {
long ret = 0;
try {
ipFile.seek(offset);
ret |= (ipFile.readByte() & 0xFF);
ret |= ((ipFile.readByte() << 8) & 0xFF00);
ret |= ((ipFile.readByte() << 16) & 0xFF0000);
ret |= ((ipFile.readByte() << 24) & 0xFF000000);
return ret;
} catch (IOException e) {
return -1;
}
}
/**
* 从offset位置读取3个字节为一个long，因为java为big-endian格式，所以没办法 用了这么一个函数来做转换
*
* @param offset
* @return 读取的long值，返回-1表示读取文件失败
*/
private long readLong3(long offset) {
long ret = 0;
try {
ipFile.seek(offset);
ipFile.readFully(b3);
ret |= (b3[0] & 0xFF);
ret |= ((b3[1] << 8) & 0xFF00);
ret |= ((b3[2] << 16) & 0xFF0000);
return ret;
} catch (IOException e) {
return -1;
}
}
/**
* 从当前位置读取3个字节转换成long
*
* @return
*/
private long readLong3() {
long ret = 0;
try {
ipFile.readFully(b3);
ret |= (b3[0] & 0xFF);
ret |= ((b3[1] << 8) & 0xFF00);
ret |= ((b3[2] << 16) & 0xFF0000);
return ret;
} catch (IOException e) {
return -1;
}
}
/**
* 从offset位置读取四个字节的ip地址放入ip数组中，读取后的ip为big-endian格式，但是
* 文件中是little-endian形式，将会进行转换
*
* @param offset
* @param ip
*/
private void readIP(long offset, byte[] ip) {
try {
ipFile.seek(offset);
ipFile.readFully(ip);
byte temp = ip[0];
ip[0] = ip[3];
ip[3] = temp;
temp = ip[1];
ip[1] = ip[2];
ip[2] = temp;
} catch (IOException e) {
System.out.println(e.getMessage());
}
}
/**
* 从offset位置读取四个字节的ip地址放入ip数组中，读取后的ip为big-endian格式，但是
* 文件中是little-endian形式，将会进行转换
*
* @param offset
* @param ip
*/
private void readIP(int offset, byte[] ip) {
mbb.position(offset);
mbb.get(ip);
byte temp = ip[0];
ip[0] = ip[3];
ip[3] = temp;
temp = ip[1];
ip[1] = ip[2];
ip[2] = temp;
}
/**
* 把类成员ip和beginIp比较，注意这个beginIp是big-endian的
*
* @param ip
* 要查询的IP
* @param beginIp
* 和被查询IP相比较的IP
* @return 相等返回0，ip大于beginIp则返回1，小于返回-1。
*/
private int compareIP(byte[] ip, byte[] beginIp) {
for (int i = 0; i < 4; i++) {
int r = compareByte(ip[i], beginIp[i]);
if (r != 0)
return r;
}
return 0;
}
/**
* 把两个byte当作无符号数进行比较
*
* @param b1
* @param b2
* @return 若b1大于b2则返回1，相等返回0，小于返回-1
*/
private int compareByte(byte b1, byte b2) {
if ((b1 & 0xFF) > (b2 & 0xFF)) // 比较是否大于
return 1;
else if ((b1 ^ b2) == 0)// 判断是否相等
return 0;
else
return -1;
}
/**
* 这个方法将根据ip的内容，定位到包含这个ip国家地区的记录处，返回一个绝对偏移 方法使用二分法查找。
*
* @param ip
* 要查询的IP
* @return 如果找到了，返回结束IP的偏移，如果没有找到，返回-1
*/
private long locateIP(byte[] ip) {
long m = 0;
int r;
// 比较第一个ip项
readIP(ipBegin, b4);
r = compareIP(ip, b4);
if (r == 0)
return ipBegin;
else if (r < 0)
return -1;
// 开始二分搜索
for (long i = ipBegin, j = ipEnd; i < j;) {
m = getMiddleOffset(i, j);
readIP(m, b4);
r = compareIP(ip, b4);
// log.debug(Utils.getIpStringFromBytes(b));
if (r > 0)
i = m;
else if (r < 0) {
if (m == j) {
j -= IP_RECORD_LENGTH;
m = j;
} else
j = m;
} else
return readLong3(m + 4);
}
// 如果循环结束了，那么i和j必定是相等的，这个记录为最可能的记录，但是并非
// 肯定就是，还要检查一下，如果是，就返回结束地址区的绝对偏移
m = readLong3(m + 4);
readIP(m, b4);
r = compareIP(ip, b4);
if (r <= 0)
return m;
else
return -1;
}
/**
* 得到begin偏移和end偏移中间位置记录的偏移
*
* @param begin
* @param end
* @return
*/
private long getMiddleOffset(long begin, long end) {
long records = (end - begin) / IP_RECORD_LENGTH;
records >>= 1;
if (records == 0)
records = 1;
return begin + records * IP_RECORD_LENGTH;
}
/**
* 给定一个ip国家地区记录的偏移，返回一个IPLocation结构
*
* @param offset
* @return
*/
private IPLocation getIPLocation(long offset) {
try {
// 跳过4字节ip
ipFile.seek(offset + 4);
// 读取第一个字节判断是否标志字节
byte b = ipFile.readByte();
if (b == AREA_FOLLOWED) {
// 读取国家偏移
long countryOffset = readLong3();
// 跳转至偏移处
ipFile.seek(countryOffset);
// 再检查一次标志字节，因为这个时候这个地方仍然可能是个重定向
b = ipFile.readByte();
if (b == NO_AREA) {
loc.country = readString(readLong3());
ipFile.seek(countryOffset + 4);
} else
loc.country = readString(countryOffset);
// 读取地区标志
loc.area = readArea(ipFile.getFilePointer());
} else if (b == NO_AREA) {
loc.country = readString(readLong3());
loc.area = readArea(offset + 8);
} else {
loc.country = readString(ipFile.getFilePointer() - 1);
loc.area = readArea(ipFile.getFilePointer());
}
return loc;
} catch (IOException e) {
return null;
}
}
/**
* @param offset
* @return
*/
private IPLocation getIPLocation(int offset) {
// 跳过4字节ip
mbb.position(offset + 4);
// 读取第一个字节判断是否标志字节
byte b = mbb.get();
if (b == AREA_FOLLOWED) {
// 读取国家偏移
int countryOffset = readInt3();
// 跳转至偏移处
mbb.position(countryOffset);
// 再检查一次标志字节，因为这个时候这个地方仍然可能是个重定向
b = mbb.get();
if (b == NO_AREA) {
loc.country = readString(readInt3());
mbb.position(countryOffset + 4);
} else
loc.country = readString(countryOffset);
// 读取地区标志
loc.area = readArea(mbb.position());
} else if (b == NO_AREA) {
loc.country = readString(readInt3());
loc.area = readArea(offset + 8);
} else {
loc.country = readString(mbb.position() - 1);
loc.area = readArea(mbb.position());
}
return loc;
}
/**
* 从offset偏移开始解析后面的字节，读出一个地区名
*
* @param offset
* @return 地区名字符串
* @throws IOException
*/
private String readArea(long offset) throws IOException {
ipFile.seek(offset);
byte b = ipFile.readByte();
if (b == 0x01 || b == 0x02) {
long areaOffset = readLong3(offset + 1);
if (areaOffset == 0)
return "未知地区";
else
return readString(areaOffset);
} else
return readString(offset);
}
/**
* @param offset
* @return
*/
private String readArea(int offset) {
mbb.position(offset);
byte b = mbb.get();
if (b == 0x01 || b == 0x02) {
int areaOffset = readInt3();
if (areaOffset == 0)
return "未知地区";
else
return readString(areaOffset);
} else
return readString(offset);
}
/**
* 从offset偏移处读取一个以0结束的字符串
*
* @param offset
* @return 读取的字符串，出错返回空字符串
*/
private String readString(long offset) {
try {
ipFile.seek(offset);
//int i;
//for (i = 0, buf[i] = ipFile.readByte(); buf[i] != 0; buf[++i] = ipFile.readByte());
//上面的写法读取数据如果超过100个字节就会报数组越界异常
int i = 0;
byte[] buf = new byte[256];
while ((buf[i] = ipFile.readByte()) != 0) {
++ i;
if (i >= buf.length) {
byte[] tmp = new byte[i + 100];
System.arraycopy(buf, 0, tmp, 0, i);
buf = tmp;
}
}
/
if (i != 0)
return Util.getString(buf, 0, i, "GBK");
} catch (IOException e) {
System.out.println(e.getMessage());
}
return "";
}
/**
* 从内存映射文件的offset位置得到一个0结尾字符串
*
* @param offset
* @return
*/
private String readString(int offset) {
try {
mbb.position(offset);
//int i;
//for (i = 0, buf[i] = mbb.get(); buf[i] != 0; buf[++i] = mbb.get());
int i = 0;
byte[] buf = new byte[256];
while ((buf[i] = mbb.get()) != 0) {
++ i;
if (i >= buf.length) {
byte[] tmp = new byte[i + 100];
System.arraycopy(buf, 0, tmp, 0, i);
buf = tmp;
}
}
if (i != 0)
return Util.getString(buf, 0, i, "GBK");
} catch (IllegalArgumentException e) {
System.out.println(e.getMessage());
}
return "";
}
public String getAddress(String ip) {
String country = getCountry(ip).equals(" CZ88.NET") ? ""
: getCountry(ip);
String area = getArea(ip).equals(" CZ88.NET") ? "" : getArea(ip);
String address = country + " " + area;
return address.trim();
}
public static void main(String[] args) {
IPSeeker ipseeker = IPSeeker.getInstance();
String sip[] = { "60.177.69.138", "124.91.62.239", "124.91.62.239",
"59.40.87.8", "221.222.73.88", "60.51.114.120",
"222.212.223.146", "60.51.114.120", "60.51.114.120",
"60.51.114.120", "60.51.114.120", "211.99.23.121",
"58.45.85.107", "58.45.85.107", "121.32.94.204",
"117.22.46.178", "218.19.2.195", "58.218.23.10",
"58.218.23.10", "202.173.10.2", "60.178.167.241",
"58.213.137.5", "58.38.165.221", "58.38.165.221",
"61.150.15.25", "58.45.82.76", "218.8.200.210", "59.33.24.233",
"60.176.240.196", "60.9.86.85", "60.51.114.120",
"60.51.114.120", "125.120.155.45", "219.140.61.180",
"219.140.61.180", "59.49.158.100", "59.49.158.100",
"58.218.23.10", "221.220.25.54", "222.71.176.119",
"220.168.115.124", "58.38.165.221", "218.3.251.246",
"58.213.137.5", "218.3.251.246", "121.33.219.235",
"222.130.195.225", "60.51.114.120", "218.3.251.246",
"219.140.61.180", "219.140.61.180", "125.120.155.45",
"60.9.97.186", "124.228.44.177", "218.19.2.195",
"222.70.225.180", "58.38.165.221", "58.38.165.221",
"60.168.67.99", "58.38.165.221", "58.38.165.221",
"61.29.214.76", "220.234.156.254", "60.51.114.120",
"60.51.114.120", "60.51.114.120", "222.168.148.111",
"117.24.28.13", "59.49.158.100", "60.209.253.61",
"61.150.15.83", "60.208.156.110", "124.227.192.131",
"125.120.155.90", "218.83.58.250", "60.191.89.102",
"222.71.176.119", "60.178.167.241", "60.208.111.203",
"222.74.231.66", "58.221.253.118", "122.89.146.55",
"60.51.114.120", "58.221.253.118", "59.49.158.100",
"218.10.158.162", "220.160.38.98", "124.227.192.131",
"219.245.44.214", "211.158.41.214", "219.245.44.185",
"218.0.113.43", "211.158.41.214", "218.68.82.73",
"125.120.144.14", "125.120.155.90", "60.171.169.251",
"124.78.165.8", "124.78.165.8", "218.22.186.125",
"202.98.224.68","218.21.40.190","218.202.208.0",
"58.18.118.0","218.21.68.175"};
for (int i = 0; i < sip.length; i++) {
//较详细的信息：
// System.out.println(ipseeker.getAddress(sip[i]));
//只打印国家省份信息:
System.out.println(ipseeker.getCountry(sip[i]));
}
}
}
2 IPEntry.java
/*
* LumaQQ - Java QQ Client
*
* Copyright (C) 2004 luma <stubma@163.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package com.worthtech.app.util.ip;
/**
* <pre>
* 一条IP范围记录，不仅包括国家和区域，也包括起始IP和结束IP
* </pre>
*
* @author luma
*/
public class IPEntry {
public String beginIp;
public String endIp;
public String country;
public String area;
/**
* 构造函数
*/
public IPEntry() {
beginIp = endIp = country = area = "";
}
}
3 Util.java
package com.worthtech.app.util.ip;
import java.io.UnsupportedEncodingException;
import java.util.StringTokenizer;
import org.apache.log4j.Level;
import com.showtime.util.LogFactory;
/**
* 工具类，提供一些方便的方法
*/
public class Util {
private static StringBuilder sb = new StringBuilder();
/**
* 从ip的字符串形式得到字节数组形式
* @param ip 字符串形式的ip
* @return 字节数组形式的ip
*/
public static byte[] getIpByteArrayFromString(String ip) {
byte[] ret = new byte[4];
StringTokenizer st = new StringTokenizer(ip, ".");
try {
ret[0] = (byte)(Integer.parseInt(st.nextToken()) & 0xFF);
ret[1] = (byte)(Integer.parseInt(st.nextToken()) & 0xFF);
ret[2] = (byte)(Integer.parseInt(st.nextToken()) & 0xFF);
ret[3] = (byte)(Integer.parseInt(st.nextToken()) & 0xFF);
} catch (Exception e) {
LogFactory.log("从ip的字符串形式得到字节数组形式报错", Level.ERROR, e);
}
return ret;
}
/**
* @param ip ip的字节数组形式
* @return 字符串形式的ip
*/
public static String getIpStringFromBytes(byte[] ip) {
sb.delete(0, sb.length());
sb.append(ip[0] & 0xFF);
sb.append('.');
sb.append(ip[1] & 0xFF);
sb.append('.');
sb.append(ip[2] & 0xFF);
sb.append('.');
sb.append(ip[3] & 0xFF);
return sb.toString();
}
/**
* 根据某种编码方式将字节数组转换成字符串
* @param b 字节数组
* @param offset 要转换的起始位置
* @param len 要转换的长度
* @param encoding 编码方式
* @return 如果encoding不支持，返回一个缺省编码的字符串
*/
public static String getString(byte[] b, int offset, int len, String encoding) {
try {
return new String(b, offset, len, encoding);
} catch (UnsupportedEncodingException e) {
return new String(b, offset, len);
}
}
}
网上还有许多人在改进它，可以参照：
http://kenai.com/projects/ipseeker/sources/subversion/show/IPSeeker
等，可以在google上输入ipseeker.java搜索它们来，改进上也没改进多少，可能就是一些小的地方。
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