IPUtils

最新推荐文章于 2025-09-12 18:08:49 发布

转载最新推荐文章于 2025-09-12 18:08:49 发布 · 82 阅读

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原文链接：http://www.cnblogs.com/strive-study/p/5161754.html

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#java

package com.cc.hkjc.util;

import java.net.InetAddress;
import java.net.UnknownHostException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class IPUtils {
   //到客户端查询用户的ip地址
   public static String getIp(HttpServletRequest request, HttpServletResponse response) {
         String ipAddress = null;
         //ipAddress = this.getRequest().getRemoteAddr();
         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")){
           //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){ //"***.***.***.***".length() = 15
             if(ipAddress.indexOf(",")>0){
                 ipAddress = ipAddress.substring(0,ipAddress.indexOf(","));
             }
         }
         return ipAddress;
      }
}