JAVA解析IP地址

POM文件

    4.0.0

    com.ccj.pxj.ip
    IpTets
    1.0-SNAPSHOT
  
      
          org.lionsoul
          ip2region
          1.7.2
      
  

package com.ccj.pxj;

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

import java.io.File;
import java.lang.reflect.Method;

public class JobIPUtil {
    public static String parseIP(String ip){

        //db
        String dbPath = IPUtil.class.getResource("/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 ( Util.isIpAddress(ip) == false ) {
                System.out.println("Error: Invalid ip address");
            }

            dataBlock  = (DataBlock) method.invoke(searcher, ip);
            String IP = dataBlock.getRegion();
            StringBuilder sb = new StringBuilder(IP);
            sb.replace(IP.indexOf("|")+1,(IP.indexOf("|",IP.indexOf("|")+1)),"-");

            return sb.toString();

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

        return null;
    }

    public static void main(String[] args) {
        //打印位置信息（格式：国家|大区|省份|城市|运营商）
        System.out.println(parseIP("171.15.58.181"));


    }

}

总结：

StringBuilder sb = new StringBuilder(IP);
sb.replace(IP.indexOf("|")+1,(IP.indexOf("|",IP.indexOf("|")+1)),"-");//替换某个位置的字符串方法
 IP.indexOf("|")+1,(IP.indexOf("|",IP.indexOf("|")+1);//找第二个字符位置

ip2region.db下载地址：

https://github.com/lionsoul2014/ip2region.git

测试结果：

中国|-|河南省|鹤壁市|电信

作者：pxj(潘陈)
日期：2020-02-12 凌晨1:25:30