Java根据ip地址获取归属地实例详解

public class IpUtils {
    /**
     * 获取ip地址
     * @param request
     * @return
     */
    public static String getIpAddr(HttpServletRequest request){
        String ipAddress = null;
        try {
            ipAddress = request.getHeader("X-Forwarded-For");
            if (ipAddress != null && ipAddress.length() != 0 && !"unknown".equalsIgnoreCase(ipAddress)) {
                // 多次反向代理后会有多个ip值，第一个ip才是真实ip
                if (ipAddress.indexOf(",") != -1) {
                    ipAddress = ipAddress.split(",")[0];
                }
            }
            if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                ipAddress = request.getHeader("Proxy-Client-IP");
            }
            if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                ipAddress = request.getHeader("WL-Proxy-Client-IP");
            }
            if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                ipAddress = request.getHeader("HTTP_CLIENT_IP");
            }
            if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                ipAddress = request.getRemoteAddr();
            }
        }catch (Exception e) {
            log.error("IPUtils ERROR ",e);
        }
        return ipAddress;
    }

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

/**
 * 获取ip属地
 * @param ip
 * @return
 * @throws Exception
 */
public static String getCityInfo(String ip) throws Exception {
    //获得文件流时，因为读取的文件是在打好jar文件里面，不能直接通过文件资源路径拿到文件，但是可以在jar包中拿到文件流
    ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
    Resource[] resources = resolver.getResources("ip2region.db");
    Resource resource = resources[0];
    InputStream is = resource.getInputStream();
    File target = new File("ip2region.db");
    FileUtils.copyInputStreamToFile(is, target);
    is.close();
    if (StringUtils.isEmpty(String.valueOf(target))) {
        log.error("Error: Invalid ip2region.db file");
        return null;
    }
    DbConfig config = new DbConfig();
    DbSearcher searcher = new DbSearcher(config, String.valueOf(target));
    //查询算法
    //B-tree, B树搜索（更快）
    int algorithm = DbSearcher.BTREE_ALGORITHM;
    try {
        //define the method
        Method method;
        method = searcher.getClass().getMethod("btreeSearch", String.class);
        DataBlock dataBlock;
        if (!Util.isIpAddress(ip)) {
            log.error("Error: Invalid ip address");
        }
        dataBlock = (DataBlock) method.invoke(searcher, ip);
        String ipInfo = dataBlock.getRegion();
        if (!StringUtils.isEmpty(ipInfo)) {
            ipInfo = ipInfo.replace("|0", "");
            ipInfo = ipInfo.replace("0|", "");
        }
        return ipInfo;
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

public static String getIpPossession(String ip) throws Exception {
    String cityInfo = IpUtils.getCityInfo(ip);
    if (!StringUtils.isEmpty(cityInfo)) {
        cityInfo = cityInfo.replace("|", " ");
        String[] cityList = cityInfo.split(" ");
        if (cityList.length > 0) {
            // 国内的显示到具体的省
            if ("中国".equals(cityList[0])) {
                if (cityList.length > 1) {
                    return cityList[1];
                }
            }
            // 国外显示到国家
            return cityList[0];
        }
    }
    return "未知";
}

public static void main(String[] args) throws Exception {
    //国内ip
    String ip1 = "220.248.12.158";
    String cityInfo1 = IpUtils.getCityInfo(ip1);
    System.out.println(cityInfo1);
    String address1 = IpUtils.getIpPossession(ip1);
    System.out.println(address1);
    //国外ip
    String ip2 = "67.220.90.13";
    String cityInfo2 = IpUtils.getCityInfo(ip2);
    System.out.println(cityInfo2);
    String address2 = IpUtils.getIpPossession(ip2);
    System.out.println(address2);
}

<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-api</artifactId>
    <version>1.7.36</version>
</dependency>
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <version>1.18.10</version>
</dependency>
<dependency>
    <groupId>org.lionsoul</groupId>
    <artifactId>ip2region</artifactId>
    <version>1.7.2</version>
</dependency>
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>servlet-api</artifactId>
    <version>2.5</version>
    <scope>provided</scope>
</dependency>
<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-lang3</artifactId>
    <version>3.12.0</version>
</dependency>
<dependency>
    <groupId>commons-io</groupId>
    <artifactId>commons-io</artifactId>
    <version>2.11.0</version>
</dependency>