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java读取纯真IP数据库QQwry.dat的源代码


zhuan(http://www.edongcn.com/blog/article.asp?id=76)
java读取纯真IP数据库QQwry.dat的源代码,要运行此程序必须有
到网上下载QQwry.da,由于太大,我这里就不提供了。
一、IPEntry.java
/** *
* 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 *

*
* @author 马若劼
*/
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 = "";
    }
    
    public String toString(){
       retur        this.area+"  "+this.country+"IP范围:"+this.beginIp+"-"+this.endIp;
    }
   }


二、Utils.java


/*
* Created on 2004-8-4
*
*/


import java.io.UnsupportedEncodingException;

/**
* @author LJ-silver
*/
public class Utils {
    /**
     * 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];
        java.util.StringTokenizer st = new java.util.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) {
            System.out.println(e.getMessage());
        }
        return ret;
    }
    
    public static void main(String args[]){
         byte[] a=getIpByteArrayFromString(args[0]);
          for(int i=0;i< a.length;i++)
                System.out.println(a[i]);
          System.out.println(getIpStringFromBytes(a));
    }
    /**
     * 对原始字符串进行编码转换,如果失败,返回原始的字符串
     * @param s 原始字符串
     * @param srcEncoding 源编码方式
     * @param destEncoding 目标编码方式
     * @return 转换编码后的字符串,失败返回原始字符串
     */
    public static String getString(String s, String srcEncoding, String destEncoding) {
        try {
            return new String(s.getBytes(srcEncoding), destEncoding);
        } catch (UnsupportedEncodingException e) {
            return s;
        }
    }
    
    /**
     * 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 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, String encoding) {
        try {
            return new String(b, encoding);
        } catch (UnsupportedEncodingException e) {
            return new String(b);
        }
    }
    
    /**
     * 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);
        }
    }
    
    /**
     * @param ip ip的字节数组形式
     * @return 字符串形式的ip
     */
    public static String getIpStringFromBytes(byte[] ip) {
        StringBuffer sb = new StringBuffer();
        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();
    }

}


三、IPSeeker.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
*/



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;




/**
*  * 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
*
*
* @author 马若劼
*/
public class IPSeeker {
    /**
     *      * 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
     *
     *
     * @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 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 IPLocation loc;
    private byte[] buf;
    private byte[] b4;
    private byte[] b3;

    /**
     * 私有构造函数
     */
    private IPSeeker()  {
        ipCache = new Hashtable();
        loc = new IPLocation();
        buf = new byte[100];
        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 = Utils.getIpStringFromBytes(b4);
                    // 得到结束IP
                    readIP(temp, b4);
                    entry.endIp = Utils.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 = Utils.getIpStringFromBytes(b4);
                        // 得到结束IP
                        readIP(temp, b4);
                        entry.endIp = Utils.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 = Utils.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(Utils.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 = Utils.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(Utils.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());
            if(i != 0)
                return Utils.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());
            if(i != 0)
                return Utils.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();
    }
}

posted on 2009-04-09 10:58 找个美女做老婆 阅读(982) 评论(0)  编辑  收藏


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