获取http请求的真实IP地址

Posted 2020-09-07

1. /** 
2.      * 获取http请求的真实IP地址  
3.      * @param request 
4.      * @return 
5.      */  
6.     // cjianquan 2016/8/2  
7.     public static String getIPAddr(HttpServletRequest request){  
8.         if (request == null)  
9.             return null;  
10.         String ip = request.getHeader("X-Forwarded-For");  
11.         if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip))  
12.             ip = request.getHeader("Proxy-Client-IP");  
13.         if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip))  
14.             ip = request.getHeader("WL-Proxy-Client-IP");  
15.         if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip))  
16.             ip = request.getHeader("HTTP_CLIENT_IP");  
17.         if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip))  
18.             ip = request.getHeader("HTTP_X_FORWARDED_FOR");  
19.         if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip))  
20.             ip = request.getRemoteAddr();  
21.         if ("127.0.0.1".equals(ip) || "0:0:0:0:0:0:0:1".equals(ip))  
22.             try {  
23.                 ip = InetAddress.getLocalHost().getHostAddress();  
24.             }  
25.             catch (UnknownHostException unknownhostexception) {  
26.             }  
27.         return ip;  
28.     }