JFinal Web 开发记录 11： （番外）JFinal 项目集成 ip2region

介绍

原文 JFinal Web 开发记录 11： （番外）JFinal 项目集成 ip2region

github https://github.com/snowfigure/ip2region
> 数据 https://github.com/snowfigure/ip2region/tree/master/data/ip2region.db

gitee https://gitee.com/lionsoul/ip2region
> 数据 https://gitee.com/lionsoul/ip2region/tree/master/data/ip2region.db

ip2region - 最自由的 ip 地址查询库，ip 到地区的映射库，提供 Binary,B 树和纯内存三种查询算法，妈妈再也不用担心我的 ip 地址定位。

Maven 仓库

<dependency>
    <groupId>org.lionsoul</groupId>
    <artifactId>ip2region</artifactId>
    <version>1.7.2</version>
</dependency>

操作

把 ip2region.db 复制到 maven 项目的 resources 目录下（当前项目为 properties 目录）.

工具类代码

package ink.fdq.snowy.core.kits;


import java.lang.reflect.Method;

import org.lionsoul.ip2region.DataBlock;
import org.lionsoul.ip2region.DbConfig;
import org.lionsoul.ip2region.DbSearcher;

import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class IpKit {
 public static boolean isIPAddress(String ipaddr) {
        boolean flag = false;
        Pattern pattern = Pattern.compile("\\b((?!\\d\\d\\d)\\d+|1\\d\\d|2[0-4]\\d|25[0-5])\\.((?!\\d\\d\\d)\\d+|1\\d\\d|2[0-4]\\d|25[0-5])\\.((?!\\d\\d\\d)\\d+|1\\d\\d|2[0-4]\\d|25[0-5])\\.((?!\\d\\d\\d)\\d+|1\\d\\d|2[0-4]\\d|25[0-5])\\b");
        Matcher m = pattern.matcher(ipaddr);
        flag = m.matches();
        return flag;
    }

    /**
     * 获取IP地址所在地
     *  国内地址 　类似：中国|0|四川省|成都市|电信        中国|0|上海|上海市|联通      中国|0|北京|北京市|阿里云
     *  国外地址　　类似：日本|0|东京都|东京|0          美国|0|加利福尼亚|0|0
     * @param ip
     * @return
     */
    public static String getCityInfo(String ip){

        //db
        String dbPath = IpKit.class.getResource("/ip/ip2region.db").getPath();

        File file = new File(dbPath);
        if ( file.exists() == false ) {
            System.out.println("Error: Invalid ip2region.db file");
        }

        //查询算法
        int algorithm = DbSearcher.BTREE_ALGORITHM; //B-tree
        //DbSearcher.BINARY_ALGORITHM //Binary
        //DbSearcher.MEMORY_ALGORITYM //Memory
        try {
            DbConfig config = new DbConfig();
            DbSearcher searcher = new DbSearcher(config, dbPath);

            //define the method
            Method method = null;
            switch ( algorithm )
            {
                case DbSearcher.BTREE_ALGORITHM:
                    method = searcher.getClass().getMethod("btreeSearch", String.class);
                    break;
                case DbSearcher.BINARY_ALGORITHM:
                    method = searcher.getClass().getMethod("binarySearch", String.class);
                    break;
                case DbSearcher.MEMORY_ALGORITYM:
                    method = searcher.getClass().getMethod("memorySearch", String.class);
                    break;
            }

            DataBlock dataBlock = null;
            if ( isIPAddress(ip) == false ) {
                System.out.println("Error: Invalid ip address");
                return null;
            }

            dataBlock  = (DataBlock) method.invoke(searcher, ip);

            return dataBlock.getRegion();

        } catch (Exception e) {
            e.printStackTrace();
        }

        return null;
    }

    public static void main(String[] args)  throws Exception{

        System.err.println(getCityInfo("47.95.208.126"));
    }
}

本期代码

本期代码参考 https://github.com/snowfigure/snowy/tree/v0.1.1