获取ip属地

引入依赖

<dependency>
     <groupId>org.lionsoulgroupId>
     <artifactId>ip2regionartifactId>
     <version>1.7.2version>
 dependency>
 <dependency>
     <groupId>org.springframework.bootgroupId>
     <artifactId>spring-boot-starter-webartifactId>
 dependency>

获取ip2region.db文件，放在resources
https://github.com/lionsoul2014/ip2region

工具类

package com.example.ipdemo.utils;

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

import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.lang.reflect.Method;
import java.net.URL;

public class IpUtil {

    /**
     * 获取IP地址
     * @param request
     * @return
     */

    public static String getIpAddr(HttpServletRequest request) {
        String ip = request.getHeader("x-forwarded-for");
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("X-Real-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
        if ("0:0:0:0:0:0:0:1".equals(ip)) {
            ip = "127.0.0.1";
        }
        if (ip.split(",").length > 1) {
            ip = ip.split(",")[0];
        }
        return ip;
    }

    /**
     * 根据IP地址获取城市
     * @param ip
     * @return
     */
    public static String getCityInfo(String ip) {
        URL url = IpUtil.class.getClassLoader().getResource("ip2region.db");
        File file;
        if (url != null) {
            file = new File(url.getFile());
        } else {
            return null;
        }
        if (!file.exists()) {
            System.out.println("Error: Invalid ip2region.db file, filePath：" + file.getPath());
            return null;
        }
        //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, file.getPath());
            Method method;
            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;
                default:
                    return null;
            }
            DataBlock dataBlock;
            if (!Util.isIpAddress(ip)) {
                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;
    }

}

测试

其它
部署服务器后，resources下文件获取不到，是因为本地是目录结构获取，打成jar后，就获取不到了，得用InputStream

Error: Invalid ip2region.db file, filePath：file:/usr/local/download/jarPackage/ipdemo-0.0.1-SNAPSHOT.jar!/BOOT-INF/classes!/ip2region.db

参考：https://blog.csdn.net/sco5282/article/details/126210398
getCityInfo方法修改后

    /**
     * 根据IP地址获取城市
     * @param ip
     * @return
     */
    public static String getCityInfo(String ip) throws IOException {
//        URL url = IpUtil.class.getClassLoader().getResource("ip2region.db");
        ClassPathResource classPathResource = new ClassPathResource("ip2region.db");
        InputStream in = classPathResource.getInputStream();
        File tmpFile = File.createTempFile("temp",".temp");
        OutputStream out=new FileOutputStream(tmpFile);
        byte[] data = new byte[1024];
        int len ;
        while ((len =in.read(data))!=-1){
            out.write(data,0,len);
        }
        in.close();
        out.close();
        File file=new File(tmpFile.getAbsolutePath());
        System.out.println("--------------------------------:"+file.getAbsolutePath());
        if (!file.exists()) {
            System.out.println("Error: Invalid ip2region.db file, filePath：" + file.getPath());
            return null;
        }
        //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, file.getPath());
            Method method;
            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;
                default:
                    return null;
            }
            DataBlock dataBlock;
            if (!Util.isIpAddress(ip)) {
                System.out.println("Error: Invalid ip address");
                return null;
            }
            dataBlock  = (DataBlock) method.invoke(searcher, ip);
            return dataBlock.getRegion();
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            tmpFile.delete();
        }
        return null;
    }