获取客户端的IP地址[复制](Getting IP address of client [dupli

这个问题已经在这里有一个答案：

我如何在servlet的客户端的远程地址？ 10个回答

我正在开发使用JSP，Servlet的（容器：Glassfish的 ）Web应用程序中，我需要得到客户的IP Address 。

我收到客户端的IP地址，因为我想给访问某些网页（例如客户维护表单）只能在电脑withing办公室，我想限制访问这些页面之外的办公室。

以下是我到目前为止的代码：

WAY1

String ipAddress =  request.getRemoteAddr();
System.out.println("IP Address: "+ipAddress);

way2

String ipAddress=null;
String getWay = request.getHeader("VIA");   // Gateway
ipAddress = request.getHeader("X-FORWARDED-FOR");   // proxy
if(ipAddress==null)
{
    ipAddress = request.getRemoteAddr();
}
System.out.println("IP Address: "+ipAddress);

上面的代码给了我different IP Address每次当我重新启动我的电脑上（Shutdown->启动或重新启动）。

我越来越IP6 ，如：

fe80:0:0:0:20ca:1776:f5ff:ff15%13

让我知道什么是错的代码？

Answer 1:

正如@马丁和这个答案解释，它是复杂的。有获取客户端的IP地址没有防弹方式。

你能做的最好是尝试解析"X-Forwarded-For"和依靠request.getRemoteAddr();

public static String getClientIpAddress(HttpServletRequest request) {
    String xForwardedForHeader = request.getHeader("X-Forwarded-For");
    if (xForwardedForHeader == null) {
        return request.getRemoteAddr();
    } else {
        // As of https://en.wikipedia.org/wiki/X-Forwarded-For
        // The general format of the field is: X-Forwarded-For: client, proxy1, proxy2 ...
        // we only want the client
        return new StringTokenizer(xForwardedForHeader, ",").nextToken().trim();
    }
}

Answer 2:

我用下面的静态辅助方法来获取客户端的IP：

public static String getClientIpAddr(HttpServletRequest request) {  
    String ip = request.getHeader("X-Forwarded-For");  
    if (ip == null || ip.length() == 0 || ip.equalsIgnoreCase("unknown")) {  
        ip = request.getHeader("Proxy-Client-IP");  
    }  
    if (ip == null || ip.length() == 0 || ip.equalsIgnoreCase("unknown")) {  
        ip = request.getHeader("WL-Proxy-Client-IP");  
    }  
    if (ip == null || ip.length() == 0 || ip.equalsIgnoreCase("unknown")) {  
        ip = request.getHeader("HTTP_X_FORWARDED_FOR");  
    }  
    if (ip == null || ip.length() == 0 || ip.equalsIgnoreCase("unknown")) {  
        ip = request.getHeader("HTTP_X_FORWARDED");  
    }  
    if (ip == null || ip.length() == 0 || ip.equalsIgnoreCase("unknown")) {  
        ip = request.getHeader("HTTP_X_CLUSTER_CLIENT_IP");  
    }  
    if (ip == null || ip.length() == 0 || ip.equalsIgnoreCase("unknown")) {  
        ip = request.getHeader("HTTP_CLIENT_IP");  
    }  
    if (ip == null || ip.length() == 0 || ip.equalsIgnoreCase("unknown")) {  
        ip = request.getHeader("HTTP_FORWARDED_FOR");  
    }  
    if (ip == null || ip.length() == 0 || ip.equalsIgnoreCase("unknown")) {  
        ip = request.getHeader("HTTP_FORWARDED");  
    }  
    if (ip == null || ip.length() == 0 || ip.equalsIgnoreCase("unknown")) {  
        ip = request.getHeader("HTTP_VIA");  
    }  
    if (ip == null || ip.length() == 0 || ip.equalsIgnoreCase("unknown")) {  
        ip = request.getHeader("REMOTE_ADDR");  
    }  
    if (ip == null || ip.length() == 0 || ip.equalsIgnoreCase("unknown")) {  
        ip = request.getRemoteAddr();  
    }  
    return ip;  
}

Answer 3:

我不这样，你可以试试

public String getIpAddr(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.getRemoteAddr();      
   }      
   return ip;      
}

Answer 4:

作为basZero提到，X - 转发，对于应检查逗号。（请看： http://en.wikipedia.org/wiki/X-Forwarded-For ）。该字段的一般格式为：X - 转发，对于：clientIP，PROXY1，Proxy2将...等等。因此，我们将看到这样的事情：X-转发-FOR：129.77.168.62，129.77.63.62。