IP获取归属地区（免费）

IP获取归属地区

使用 http://whois.pconline.com.cn/ipJson.jsp 这个 URL 来获取 IP 地址的归属城市信息

import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Objects;
import javax.servlet.http.HttpServletRequest;

import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class IpAddressUtils {
    private static final Logger log = LoggerFactory.getLogger(IpAddressUtils.class);

    /**
     * 获取当前网络ip
     *
     * @param request
     * @return
     */
    public static String getIpAddr(HttpServletRequest request) {
        String ipAddress = request.getHeader("x-forwarded-for");
        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.getRemoteAddr();
            if (ipAddress.equals("127.0.0.1") || ipAddress.equals("0:0:0:0:0:0:0:1")) {
                //根据网卡取本机配置的IP
                InetAddress inet = null;
                try {
                    inet = InetAddress.getLocalHost();
                } catch (UnknownHostException e) {
                    log.error("Error occurred when getIpAddr method was invoked.ex:", e);
                }
                ipAddress = inet.getHostAddress();
            }
        }
        //对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
        if (ipAddress != null && ipAddress.length() > 15) { //"***.***.***.***".length() = 15
            if (ipAddress.indexOf(",") > 0) {
                ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
            }
        }
        return ipAddress;
    }


    /**
     * IP获取归属地区
     * @param ipAddress
     * @return
     */
    public static String getAddress(String ipAddress) {
        CloseableHttpClient httpClient = null;
        CloseableHttpResponse response = null;
        String address = null;
        try {
            // 创建 HttpClient 实例
            httpClient = HttpClients.createDefault();

            // 构建 API 请求 URL
            String apiUrl = "http://whois.pconline.com.cn/ipJson.jsp?ip=" + ipAddress;

            // 创建 HttpGet 请求
            HttpGet httpGet = new HttpGet(apiUrl);

            // 发送请求并获取响应
            response = httpClient.execute(httpGet);

            // 解析响应
            if (response.getStatusLine().getStatusCode() == 200) {
                String jsonResponse = EntityUtils.toString(response.getEntity(), "GBK");
                address = jsonResponse.substring(jsonResponse.indexOf("addr") + 7, jsonResponse.indexOf("regionNames") - 3);
            }

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            close(httpClient, response);
            return address;
        }
    }


    public static void close(CloseableHttpClient httpClient, CloseableHttpResponse response) {
        try {
            if (Objects.nonNull(response)) {
                response.close();
            }
            if(Objects.nonNull(httpClient)){
                httpClient.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}