package com.dl.common.utils.ip;
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import cn.hutool.core.io.FileUtil;
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import cn.hutool.core.io.resource.ClassPathResource;
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import cn.hutool.core.util.ObjectUtil;
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import com.dl.common.exception.ServiceException;
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import com.dl.common.utils.file.FileUtils;
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import lombok.extern.slf4j.Slf4j;
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import org.lionsoul.ip2region.xdb.Searcher;
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import java.io.File;
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/**
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* 根据ip地址定位工具类,离线方式
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* 参考地址:<a href="https://gitee.com/lionsoul/ip2region/tree/master/binding/java">集成 ip2region 实现离线IP地址定位库</a>
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*
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* @author lishuyan
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*/
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@Slf4j
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public class RegionUtils {
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private static final Searcher SEARCHER;
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static {
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String fileName = "/ip2region.xdb";
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File existFile = FileUtils.file(FileUtil.getTmpDir() + FileUtil.FILE_SEPARATOR + fileName);
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if (!FileUtils.exist(existFile)) {
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ClassPathResource fileStream = new ClassPathResource(fileName);
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if (ObjectUtil.isEmpty(fileStream.getStream())) {
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throw new ServiceException("RegionUtils初始化失败,原因:IP地址库数据不存在!");
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}
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FileUtils.writeFromStream(fileStream.getStream(), existFile);
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}
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String dbPath = existFile.getPath();
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// 1、从 dbPath 加载整个 xdb 到内存。
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byte[] cBuff;
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try {
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cBuff = Searcher.loadContentFromFile(dbPath);
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} catch (Exception e) {
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throw new ServiceException("RegionUtils初始化失败,原因:从ip2region.xdb文件加载内容失败!" + e.getMessage());
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}
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// 2、使用上述的 cBuff 创建一个完全基于内存的查询对象。
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try {
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SEARCHER = Searcher.newWithBuffer(cBuff);
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} catch (Exception e) {
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throw new ServiceException("RegionUtils初始化失败,原因:" + e.getMessage());
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}
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}
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/**
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* 根据IP地址离线获取城市
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*/
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public static String getCityInfo(String ip) {
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try {
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ip = ip.trim();
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// 3、执行查询
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String region = SEARCHER.search(ip);
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return region.replace("0|", "").replace("|0", "");
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} catch (Exception e) {
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log.error("IP地址离线获取城市异常 {}", ip);
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return "未知";
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}
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}
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}
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