java - JSP获取客户端IP地址

Question

我需要在JSP页面中获取客户端的IP地址。我尝试了以下方法:

request.getRemoteAddr()
request.getHeader("X_FORWARDED_FOR")
request.getHeader("HTTP_CLIENT_IP")
request.getHeader("WL-Proxy-Client-IP")
request.getHeader("Proxy-Client-IP")
request.getHeader("REMOTE_ADDR")

但是，这些方法都没有返回所需的 IP 地址。如何获取JSP页面中客户端的IP地址？

Answer 1

为了获取客户端的IP地址，我使用了以下方法

<%   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();  
        }
        %>

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