【java】获取客户端访问的公网ip和归属地

 import com.alibaba.druid.support.json.JSONUtils;
 import org.thymeleaf.util.StringUtils;

 import javax.servlet.http.HttpServletRequest;
 import java.io.*;
 import java.net.*;
 import java.util.Map;

 /**
  * Created with IntelliJ IDEA.
  * User: xiaostudy
  * Date: 2019/7/18
  * Time: 19:58
  * Description: No Description
  */
 public class IpUtil {

     private static String urlStr = "http://ip.taobao.com/service/getIpInfo2.php";

     public static String getIpAddr(HttpServletRequest request) {
         String ipAddress;
         try {
             ipAddress = request.getHeader("x-forwarded-for");
             System.out.println("ipAddress:" + ipAddress);
             if (null == ipAddress || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                 ipAddress = request.getHeader("Proxy-Client-IP");
             }
             if (null == ipAddress || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                 ipAddress = request.getHeader("WL-Proxy-Client-IP");
             }
             if (null == ipAddress || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                 ipAddress = request.getHeader("HTTP_CLIENT_IP");
             }
             if (null == ipAddress || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                 ipAddress = request.getHeader("HTTP_X_FORWARDED_FOR");
             }
             if (null == ipAddress || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                 ipAddress = request.getHeader("X-Real-IP");
             }
             if (null == ipAddress || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                 ipAddress = request.getRemoteAddr();
                 if ("127.0.0.1".equals(ipAddress) || "0:0:0:0:0:0:0:1".equals(ipAddress)) {
                     // 根据网卡取本机配置的IP
                     InetAddress inet = null;
                     try {
                         inet = InetAddress.getLocalHost();
                     } catch (UnknownHostException e) {
                         e.printStackTrace();
                     }
                     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) {
                 if (ipAddress.indexOf(',') > 0) {
                     ipAddress = ipAddress.substring(0, ipAddress.indexOf(','));
                 }
             }
         } catch (Exception e) {
             ipAddress = "";
         }

         return ipAddress;
     }

     /**
      * 通过ip获取归属地
      *
      * @param ip
      * @return
      */
     public static String ipToBelonging(String ip) {
         System.out.println(getAddresses("ip=myip"));
         return getAddresses("ip=" + ip);
     }

     private static String getAddresses(String content) {
         String returnStr = getResult(urlStr, content, "utf-8");
         System.out.println(returnStr);
         if(!StringUtils.isEmpty(returnStr)) {
             Object parse = JSONUtils.parse(returnStr);
             if(parse instanceof Map) {
                 Map result = (Map) parse;
                 Object code = result.get("code");
                 Object data = result.get("data");
                 if(null == code || !"0".equals(code.toString()) || null == data) {
                     return "ip解析真实地址出错";
                 } else if(data instanceof Map) {
                     Map map = (Map) data;
                     String country = map.get("country").toString();
                     if("XX".equals(country)) {
                         return "内网地址";
                     }
                     String isp = map.get("isp").toString() + "-";
                     if("内网IP-".equals(isp)) {
                         isp = "";
                     }
                     String region = map.get("region").toString();
                     if("XX".equals(region)) {
                         region = "";
                     }
                     String city = map.get("city").toString();
                     if("XX".equals(city)) {
                         city = "";
                     }
                     String county = map.get("county").toString();
                     if("XX".equals(county)) {
                         county = "";
                     }
                     return isp + country + region + city + county;
                 } else {
                     return "ip解析真实地址出错";
                 }
             }
         }
         return returnStr;
     }

     /**
      * @param urlStr   请求的地址
      * @param content  请求的参数 格式为：name=xxx&pwd=xxx
      * @param encoding 服务器端请求编码。如GBK,UTF-8等
      * @return
      */
     private static String getResult(String urlStr, String content, String encoding) {
         if(null == content) {
             content = "";
         }
         if(StringUtils.isEmpty(encoding)) {
             encoding = "utf-8";
         }
         URL url;
         HttpURLConnection connection = null;
         try {
             url = new URL(urlStr);
             connection = (HttpURLConnection) url.openConnection(); // 新建连接实例
             connection.setConnectTimeout(2000); // 设置连接超时时间，单位毫秒
             connection.setReadTimeout(2000); // 设置读取数据超时时间，单位毫秒
             connection.setDoOutput(true); // 是否打开输出流 true|false
             connection.setDoInput(true); // 是否打开输入流true|false
             connection.setRequestMethod("POST"); // 提交方法POST|GET
             connection.setUseCaches(false); // 是否缓存true|false
             connection.connect(); // 打开连接端口
             DataOutputStream out = new DataOutputStream(connection.getOutputStream());// 打开输出流往对端服务器写数据
             out.writeBytes(content); // 写数据,也就是提交你的表单 name=xxx&pwd=xxx
             out.flush(); // 刷新
             out.close(); // 关闭输出流
             BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), encoding));// 往对端写完数据对端服务器返回数据
             // ,以BufferedReader流来读取
             StringBuffer buffer = new StringBuffer();
             String line = "";
             while ((line = reader.readLine()) != null) {
                 buffer.append(line);
             }
             reader.close();
             return buffer.toString();
         } catch (IOException e) {
             e.printStackTrace();
         } finally {
             if (connection != null) {
                 connection.disconnect(); // 关闭连接
             }
         }
         return null;
     }
 }