本文主要是介绍java读取纯真IP数据库QQwry.dat的源代码，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
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 swallow */ 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; } } 
/**/ /* * 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 这篇关于java读取纯真IP数据库QQwry.dat的源代码的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！
