/**
 * @Description：獲取客戶端外網(wǎng)ip 此方法要接入互聯(lián)網(wǎng)才行，內(nèi)網(wǎng)不行
 **/
public static String getPublicIp() {
    try {
        String path = "http://www.net.cn/static/customercare/yourip.asp";// 要獲得html頁(yè)面內(nèi)容的地址(萬(wàn)網(wǎng))

        URL url = new URL(path);// 創(chuàng)建url對(duì)象

        HttpURLConnection conn = (HttpURLConnection) url.openConnection();// 打開(kāi)連接

        conn.setRequestProperty("contentType", "GBK"); // 設(shè)置url中文參數(shù)編碼

        conn.setConnectTimeout(5 * 1000);// 請(qǐng)求的時(shí)間

        conn.setRequestMethod("GET");// 請(qǐng)求方式

        InputStream inStream = conn.getInputStream();
        // readLesoSysXML(inStream);

        BufferedReader in = new BufferedReader(new InputStreamReader(
                inStream, "GBK"));
        StringBuilder buffer = new StringBuilder();
        String line;
        // 讀取獲取到內(nèi)容的最后一行,寫(xiě)入
        while ((line = in.readLine()) != null) {
            buffer.append(line);
        }
        List<String> ips = new ArrayList<>();

        //用正則表達(dá)式提取String字符串中的IP地址
        String regEx="((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)";
        String str = buffer.toString();
        Pattern p = Pattern.compile(regEx);
        Matcher m = p.matcher(str);
        while (m.find()) {
            String result = m.group();
            ips.add(result);
        }

        // 返回公網(wǎng)IP值
        return ips.get(0);

    } catch (Exception e) {
        System.out.println("獲取公網(wǎng)IP連接超時(shí)");
        return "";
    }
}

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

@Log4j2
public class IPUtils {

    /**
     * 根據(jù)IP獲取地址
     *
     * @return 國(guó)家|區(qū)域|省份|城市|ISP
     */
    public static String getAddress(String ip) {
        return getAddress(ip, DbSearcher.BTREE_ALGORITHM);
    }

    /**
     * 根據(jù)IP獲取地址
     *
     * @param ip
     * @param algorithm 查詢算法
     * @return 國(guó)家|區(qū)域|省份|城市|ISP
     * @see DbSearcher
     * DbSearcher.BTREE_ALGORITHM; //B-tree
     * DbSearcher.BINARY_ALGORITHM //Binary
     * DbSearcher.MEMORY_ALGORITYM //Memory
     */
    @SneakyThrows
    public static String getAddress(String ip, int algorithm) {
        if (!Util.isIpAddress(ip)) {
            log.error("錯(cuò)誤格式的ip地址: {}", ip);
            return "";
        }
        String dbPath = IPUtils.class.getResource("/db/ip2region.db").getPath();
        File file = new File(dbPath);
        if (!file.exists()) {
            log.error("地址庫(kù)文件不存在");
            return "";
        }
        DbSearcher searcher = new DbSearcher(new DbConfig(), dbPath);
        DataBlock dataBlock;
        switch (algorithm) {
            case DbSearcher.BTREE_ALGORITHM:
                dataBlock = searcher.btreeSearch(ip);
                break;
            case DbSearcher.BINARY_ALGORITHM:
                dataBlock = searcher.binarySearch(ip);
                break;
            case DbSearcher.MEMORY_ALGORITYM:
                dataBlock = searcher.memorySearch(ip);
                break;
            default:
                log.error("未傳入正確的查詢算法");
                return "";
        }
        searcher.close();
        return dataBlock.getRegion();
    }

@GetMapping("/weather")
@DecryptBody(encode = true) //響應(yīng)加密
public Result getWeather(){
    String publicIp = GetIPUtils.getPublicIp();//獲取外網(wǎng)IP
    if (StringUtils.isBlank(publicIp)) return ResultUtils.error("獲取失敗");
    String cityInfo = IPUtils.getAddress(publicIp);//國(guó)家|區(qū)域|省份|城市|ISP
    if (StringUtils.isBlank(cityInfo)) return ResultUtils.error("獲取失敗");
    String[] split = cityInfo.split("\|");
    String city = "";
    for (String aSplit : split) if (aSplit.contains("市")) city = aSplit;//拿取市級(jí)名稱
    if (StringUtils.isBlank(city)) return ResultUtils.error("獲取失敗");
    String weatherInformation = HttpUtil.get("http://portalweather.comsys.net.cn/weather03/api/weatherService/getDailyWeather?cityName=" + city);//調(diào)用天氣接口
    if (StringUtils.isBlank(weatherInformation)) return ResultUtils.error("獲取失敗");
    Object o = ObjectMapperUtils.strToObj(weatherInformation,Object.class);
    return ResultUtils.success("獲取成功",o);
}