Java里面获取当前服务器(linux环境)的IP地址--与请求者的真实IP

雨点打透心脏的1/2处 2021-12-03 15:39 489阅读 0赞

1 package com.wfd360.Util;
      2 
      3 import javax.servlet.http.HttpServletRequest;
      4 import java.net.Inet4Address;
      5 import java.net.InetAddress;
      6 import java.net.NetworkInterface;
      7 import java.net.SocketException;
      8 import java.util.Enumeration;
      9 import java.util.HashMap;
     10 import java.util.Map;
     11 
     12 /**
     13  * @Copyright (C) 
     14  * @Author: 姿势帝
     15  * @Date: 6/3 16:37
     16  * @Description:
     17  */
     18 public class HostUtil {
     19     private static String ipstr = "127.0.0.1";
     20     private static Map<String, String> map = new HashMap();
     21 
     22     static {
     23         map.put("ip", getLinuxLocalIp());
     24     }
     25 
     26     public static String getHostIp() {
     27         String ip = map.get("ip");
     28         if (ip == null) {
     29             String ip1 = getLinuxLocalIp();
     30             map.put("ip", ip1);
     31             return ip1;
     32         }
     33         return ip;
     34     }
     35     
     36 
     37     /**
     38      * 获取Linux下的IP地址
     39      *
     40      * @return IP地址
     41      * @throws SocketException
     42      */
     43     private static String getLinuxLocalIp() {
     44         String ip = "";
     45         try {
     46             for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements(); ) {
     47                 NetworkInterface intf = en.nextElement();
     48                 String name = intf.getName();
     49                 if (!name.contains("docker") && !name.contains("lo")) {
     50                     for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements(); ) {
     51                         InetAddress inetAddress = enumIpAddr.nextElement();
     52                         if (!inetAddress.isLoopbackAddress()) {
     53                             String ipaddress = inetAddress.getHostAddress().toString();
     54                             if (!ipaddress.contains("::") && !ipaddress.contains("0:0:") && !ipaddress.contains("fe80")) {
     55                                 ip = ipaddress;
     56                             }
     57                         }
     58                     }
     59                 }
     60             }
     61         } catch (SocketException ex) {
     62             ip = "127.0.0.1";
     63             ex.printStackTrace();
     64         }
     65         return ip;
     66     }
     67 
     68     /**
     69      * 获取请求者的ip地址
     70      *
     71      * @param request
     72      * @return
     73      */
     74     public static String getIpAdrress(HttpServletRequest request) {
     75         String ip = null;
     76 
     77         //X-Forwarded-For：Squid 服务代理
     78         String ipAddresses = request.getHeader("X-Forwarded-For");
     79         String unknown = "unknown";
     80         if (ipAddresses == null || ipAddresses.length() == 0 || unknown.equalsIgnoreCase(ipAddresses)) {
     81             //Proxy-Client-IP：apache 服务代理
     82             ipAddresses = request.getHeader("Proxy-Client-IP");
     83         }
     84 
     85         if (ipAddresses == null || ipAddresses.length() == 0 || unknown.equalsIgnoreCase(ipAddresses)) {
     86             //WL-Proxy-Client-IP：weblogic 服务代理
     87             ipAddresses = request.getHeader("WL-Proxy-Client-IP");
     88         }
     89 
     90         if (ipAddresses == null || ipAddresses.length() == 0 || unknown.equalsIgnoreCase(ipAddresses)) {
     91             //HTTP_CLIENT_IP：有些代理服务器
     92             ipAddresses = request.getHeader("HTTP_CLIENT_IP");
     93         }
     94 
     95         if (ipAddresses == null || ipAddresses.length() == 0 || unknown.equalsIgnoreCase(ipAddresses)) {
     96             //X-Real-IP：nginx服务代理
     97             ipAddresses = request.getHeader("X-Real-IP");
     98         }
     99 
    100         //有些网络通过多层代理，那么获取到的ip就会有多个，一般都是通过逗号（,）分割开来，并且第一个ip为客户端的真实IP
    101         if (ipAddresses != null && ipAddresses.length() != 0) {
    102             ip = ipAddresses.split(",")[0];
    103         }
    104 
    105         //还是不能获取到，最后再通过request.getRemoteAddr();获取
    106         if (ip == null || ip.length() == 0 || unknown.equalsIgnoreCase(ipAddresses)) {
    107             ip = request.getRemoteAddr();
    108         }
    109         return ip;
    110     }
    111 
    112 
    113 }

转载于:https://www.cnblogs.com/newAndHui/p/11200775.html