Java - Get Visitor/Client ip address : JSP : Servlet

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The previous post show how to get Visitor or client ip address in C# / ASP.NET .

This post will show how to get ip address of client / visitor from jsp / servlet application. In order to make this method work, you need to test this method on the server and you are accessing the server from your computer. Otherwise you will get your local ipaddress or ::1 value.

The getClientIpAddr Method

     public static String getClientIpAddr(HttpServletRequest request) {  
        String ip = request.getHeader("X-FORWARDED-FOR");  
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  
            ip = request.getHeader("Proxy-Client-IP");  
        }  
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  
            ip = request.getHeader("WL-Proxy-Client-IP");  
        }  
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  
            ip = request.getHeader("HTTP_CLIENT_IP");  
        }  
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  
            ip = request.getHeader("HTTP_X_FORWARDED_FOR");  
        }  
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  
            ip = request.getRemoteAddr();  
        }  
        return ip;  
    }


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