??xml version="1.0" encoding="utf-8" standalone="yes"?>精品国产成人av,亚州色图欧美色图,亚洲字幕久久http://www.aygfsteel.com/lcs868/category/36640.htmlzh-cnTue, 16 Dec 2008 08:09:25 GMTTue, 16 Dec 2008 08:09:25 GMT60java实现ip查询http://www.aygfsteel.com/lcs868/archive/2008/12/16/246644.htmllcs868lcs868Tue, 16 Dec 2008 07:56:00 GMThttp://www.aygfsteel.com/lcs868/archive/2008/12/16/246644.htmlhttp://www.aygfsteel.com/lcs868/comments/246644.htmlhttp://www.aygfsteel.com/lcs868/archive/2008/12/16/246644.html#Feedback0http://www.aygfsteel.com/lcs868/comments/commentRss/246644.htmlhttp://www.aygfsteel.com/lcs868/services/trackbacks/246644.html 用java实现对纯真IP数据库的查询Q首先到|上下蝲QQwry.da文gQ读取代码如下:
1.IP记录实体c?br />

package com.guess.tools;

/** *
* 一条IP范围记录Q不仅包括国家和区域Q也包括起始IP和结束IP *

 *
 * @author swallow */
public class IPEntry {
    public String beginIp;
    public String endIp;
    public String country;
    public String area;
   
    /** *//**
     * 构造函?br />      */
  
 

 public IPEntry() {
        beginIp = endIp = country = area = "";
    }
   
    public String toString(){
       return        this.area+"  "+this.country+"IP范围:"+this.beginIp+"-"+this.endIp;
    }
   }
2.dQQwry.dat文gc?/span>

package com.guess.tools;

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dQQwry.dat文gQ以Ҏip获得好友位置QQQwry.dat的格式是
 * 一. 文g_?字节
 *        1. W一个v始IP的绝对偏U, 4字节
 *     2. 最后一个v始IP的绝对偏U, 4字节
 * ? "l束地址/国家/区域"记录?br />  *     四字节ip地址后跟的每一条记录分成两个部?br />  *     1. 国家记录
 *     2. 地区记录
 *     但是地区记录是不一定有的。而且国家记录和地录都有两UŞ?br />  *     1. ?l束的字W串
 *     2. 4个字节,一个字节可能ؓ0x1?x2
 *           a. ?x1Ӟ表示在绝对偏Udq跟着一个区域的记录Q注意是l对偏移之后Q而不是这四个字节之后
 *        b. ?x2Ӟ表示在绝对偏Ud没有区域记录
 *        不管?x1q是0x2Q后三个字节都是实际国家名的文g内绝对偏U?br />  *           如果是地录,0x1?x2的含义不明,但是如果出现q两个字节,也肯定是跟着3个字节偏U,如果不是
 *        则ؓ0l尾字符?br />  * ? "起始地址/l束地址偏移"记录?br />  *     1. 每条记录7字节Q按照v始地址从小到大排列
 *        a. 起始IP地址Q?字节
 *        b. l束ip地址的绝对偏U,3字节
 *
 * 注意Q这个文仉的ip地址和所有的偏移量均采用little-endian格式Q而java是采?br />  * big-endian格式的,要注意{?br />  *
 *
 * @author 马若?br />  */
public class IPSeeker {
    /** *//**
     *      * 用来装ip相关信息Q目前只有两个字D,ip所在的国家和地?br />      *
     *
     * @author swallow     */
    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
    private static final int IP_RECORD_LENGTH = 7;
    private static final byte AREA_FOLLOWED = 0x01;
    private static final byte NO_AREA = 0x2;

     // 用来做ؓcacheQ查询一个ip旉先查看cacheQ以减少不必要的重复查找
    private Hashtable ipCache;
    // 随机文g讉Kc?br />     private RandomAccessFile ipFile;
    // 内存映射文g
    private MappedByteBuffer mbb;
    // 单一模式实例
    private static IPSeeker instance = new IPSeeker();
    // 起始地区的开始和l束的绝对偏U?br />     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;

    /** *//**
     * U有构造函?br />      */
    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g没有扑ֈQIP昄功能无法?);
            ipFile = null;

        }
        // 如果打开文g成功Q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g格式有错误,IP昄功能无法?);
                ipFile = null;
            }
        }
    }

    /** *//**
     * @return 单一实例
     */
    public static IPSeeker getInstance() {
        return instance;
    }

    /** *//**
     * l定一个地点的不完全名字,得到一pd包含s子串的IP范围记录
     * @param s 地点子串
     * @return 包含IPEntrycd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) {
            // dl束IP偏移
            long temp = readLong3(offset);
            // 如果temp不等?1Q读取IP的地点信?br />             if(temp != -1) {
                IPLocation loc = getIPLocation(temp);
                // 判断是否q个地点里面包含了s子串Q如果包含了Q添加这个记录到List中,如果没有Ql?br />                 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l束IP
                    readIP(temp, b4);
                    entry.endIp = Utils.getIpStringFromBytes(b4);
                    // d该记?br />                     ret.add(entry);
                }
            }
        }
        return ret;
    }

    /** *//**
     * l定一个地点的不完全名字,得到一pd包含s子串的IP范围记录
     * @param s 地点子串
     * @return 包含IPEntrycd的List
     */
    public List getIPEntries(String s) {
        List ret = new ArrayList();
        try {
            // 映射IP信息文g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q个地点里面包含了s子串Q如果包含了Q添加这个记录到List中,如果没有Ql?br />                     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l束IP
                        readIP(temp, b4);
                        entry.endIp = Utils.getIpStringFromBytes(b4);
                        // d该记?br />                         ret.add(entry);
                    }
                }
            }
        } catch (IOException e) {
            System.out.println(e.getMessage());
        }
        return ret;
    }

    /** *//**
     * 从内存映文件的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;
    }

    /** *//**
     * ҎIP得到国家?br />      * @param ip ip的字节数lŞ?br />      * @return 国家名字W串
     */
    public String getCountry(byte[] ip) {
        // 查ip地址文g是否正常
        if(ipFile == null) return "错误的IP数据库文?;
        // 保存ipQ{换ip字节数组为字W串形式
        String ipStr = Utils.getIpStringFromBytes(ip);
        // 先检查cache中是否已l包含有q个ip的结果,没有再搜索文?br />         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;
        }
    }

    /** *//**
     * ҎIP得到国家?br />      * @param ip IP的字W串形式
     * @return 国家名字W串
     */
    public String getCountry(String ip) {
        return getCountry(Utils.getIpByteArrayFromString(ip));
    }

    /** *//**
     * ҎIP得到地区?br />      * @param ip ip的字节数lŞ?br />      * @return 地区名字W串
     */
    public String getArea(byte[] ip) {
        // 查ip地址文g是否正常
        if(ipFile == null) return "错误的IP数据库文?;
        // 保存ipQ{换ip字节数组为字W串形式
        String ipStr = Utils.getIpStringFromBytes(ip);
        // 先检查cache中是否已l包含有q个ip的结果,没有再搜索文?br />         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;
        }
    }

    /** *//**
     * ҎIP得到地区?br />      * @param ip IP的字W串形式
     * @return 地区名字W串
     */
    public String getArea(String ip) {
        return getArea(Utils.getIpByteArrayFromString(ip));
    }

    /** *//**
     * Ҏip搜烦ip信息文gQ得到IPLocationl构Q所搜烦的ip参数从类成员ip中得?br />      * @param ip 要查询的IP
     * @return IPLocationl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d4个字节ؓ一个longQ因为java为big-endian格式Q所以没办法
     * 用了q么一个函数来做{?br />      * @param offset
     * @return d的long|q回-1表示d文gp|
     */
    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d3个字节ؓ一个longQ因为java为big-endian格式Q所以没办法
     * 用了q么一个函数来做{?br />      * @param offset
     * @return d的long|q回-1表示d文gp|
     */
    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|读?个字节{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d四个字节的ip地址攑օip数组中,d后的ip为big-endian格式Q但?br />      * 文g中是little-endian形式Q将会进行{?br />      * @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d四个字节的ip地址攑օip数组中,d后的ip为big-endian格式Q但?br />      * 文g中是little-endian形式Q将会进行{?br />      * @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Q注意这个beginIp是big-endian?br />      * @param ip 要查询的IP
     * @param beginIp 和被查询IP相比较的IP
     * @return 相等q回0Qip大于beginIp则返?Q小于返?1?br />      */
    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hq行比较
     * @param b1
     * @param b2
     * @return 若b1大于b2则返?Q相{返?Q小于返?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;
    }

    /** *//**
     * q个Ҏ根据ip的内容,定位到包含这个ip国家地区的记录处Q返回一个绝对偏U?br />      * Ҏ使用二分法查找?br />      * @param ip 要查询的IP
     * @return 如果扑ֈ了,q回l束IP的偏U,如果没有扑ֈQ返?1
     */
    private long locateIP(byte[] ip) {
        long m = 0;
        int r;
        // 比较W一个ip?br />         readIP(ipBegin, b4);
        r = compareIP(ip, b4);
        if(r == 0) return ipBegin;
        else if(r < 0) return -1;
        // 开始二分搜?br />         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l束了,那么i和j必定是相{的Q这个记录ؓ最可能的记录,但是q
        //     肯定是Q还要检查一下,如果是,p回结束地址区的l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U?br />      * @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;
    }

    /** *//**
     * l定一个ip国家地区记录的偏U,q回一个IPLocationl构
     * @param offset
     * @return
     */
    private IPLocation getIPLocation(long offset) {
        try {
            // 跌4字节ip
            ipFile.seek(offset + 4);
            // dW一个字节判断是否标志字?br />             byte b = ipFile.readByte();
            if(b == AREA_FOLLOWED) {
                // d国家偏移
                long countryOffset = readLong3();
                // 跌{臛_Ud
                ipFile.seek(countryOffset);
                // 再检查一ơ标志字节,因ؓq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);
                // d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) {
        // 跌4字节ip
        mbb.position(offset + 4);
        // dW一个字节判断是否标志字?br />         byte b = mbb.get();
        if(b == AREA_FOLLOWED) {
            // d国家偏移
            int countryOffset = readInt3();
            // 跌{臛_Ud
            mbb.position(countryOffset);
            // 再检查一ơ标志字节,因ؓq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);
            // d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Q读Z个地区名
     * @param offset
     * @return 地区名字W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0l束的字W串
     * @param offset
     * @return d的字W串Q出错返回空字符?br />      */
    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 "";
    }

    /** *//**
     * 从内存映文件的offset位置得到一?l尾字符?br />      * @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();
    }
    public static void main(String args[]) {
     List list=IPSeeker.getInstance().getIPEntriesDebug("江省杭州市");
     
     
     
    }
}

 



lcs868 2008-12-16 15:56 发表评论
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