1.添加依赖

  <dependency>
    <groupId>org.lionsoul</groupId>
    <artifactId>ip2region</artifactId>
    <version>2.6.5</version>
  </dependency>

pom.xml

<build>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**.*</include>
                    <include>**/*.*</include><!-- i18n能读取到 -->
                    <include>**/*/*.*</include>
                </includes>
            </resource>
        </resources>
    </build>

2.添加工具类RegionUtil.java

import java.io.File;
import java.io.InputStream;

import com.wxbd.zhsl.common.core.utils.StringUtils;
import org.apache.commons.io.FileUtils;
import org.lionsoul.ip2region.xdb.Searcher;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.io.ClassPathResource;

/**
 * 根据ip离线查询地址
 *
 * @author
 */
public class RegionUtil
{
    private static final Logger log = LoggerFactory.getLogger(RegionUtil.class);

    private static final String JAVA_TEMP_DIR = "java.io.tmpdir";

    static Searcher searcher = null;

    /**
     * 初始化IP库
     */
    static
    {
        try
        {

            // 因为jar无法读取文件,复制创建临时文件
            String dbPath = RegionUtil.class.getResource("/ip2region/ip2region.xdb").getPath();
            File file = new File(dbPath);
            byte[] cBuff = new byte[(int)file.length()];
            if (!file.exists())
            {
                String tmpDir = System.getProperties().getProperty(JAVA_TEMP_DIR);
                dbPath = tmpDir + "ip2region.xdb";
                file = new File(dbPath);
                ClassPathResource cpr = new ClassPathResource("ip2region" + File.separator + "ip2region.xdb");
                InputStream resourceAsStream = cpr.getInputStream();
                if (resourceAsStream != null)
                {
                    FileUtils.copyInputStreamToFile(resourceAsStream, file);
                }
                cBuff = Searcher.loadContentFromFile(dbPath);

            }
            searcher = Searcher.newWithBuffer(cBuff);
            log.info("bean [{}]", searcher);
        }
        catch (Exception e)
        {
            log.error("init ip region error:{}", e);
        }
    }

    /**
     * 解析IP
     *
     * @param ip
     * @return
     */
    public static String getRegion(String ip)
    {
        try
        {
            // db
            if (searcher == null || StringUtils.isEmpty(ip))
            {
                log.error("DbSearcher is null");
                return StringUtils.EMPTY;
            }
            long startTime = System.currentTimeMillis();

            String result = searcher.search(ip);
            long endTime = System.currentTimeMillis();
            log.debug("region use time[{}] result[{}]", endTime - startTime, result);
            return result;

        }
        catch (Exception e)
        {
            log.error("error:{}", e);
        }
        return StringUtils.EMPTY;
    }

}

3.获取地址

import com.wxbd.zhsl.common.core.utils.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


/**
 * 获取地址类
 *
 * @author
 */
public class AddressUtils
{
    private static final Logger log = LoggerFactory.getLogger(AddressUtils.class);

    // 未知地址
    public static final String UNKNOWN = "XX XX";

    public static String getRealAddressByIP(String ip)
    {
        String address = UNKNOWN;
        // 内网不查询
        if (IpUtils.internalIp(ip))
        {
            return "内网IP";
        }

        try {
            String rspStr = RegionUtil.getRegion(ip);
            if (StringUtils.isEmpty(rspStr)) {
                log.error("获取地理位置异常 {}", ip);
                return UNKNOWN;
            }
            String[] obj = rspStr.split("\\|");
            String region = obj[2];
            String city = obj[3];

            return String.format("%s %s", region, city);
        } catch (Exception e) {
            log.error("获取地理位置异常 {}", e);
        }

        return address;
    }
}

4.添加离线IP地址库

在src/main/resources下新建ip2region复制文件ip2region.xdb到目录下。

5.调用

AddressUtils.getRealAddressByIP("22.22.22.22");

参考

ip2region库
java官方示例