jsp中获取客户端的IP

1.public static String getIpAddr(HttpServletRequest request) {  
2.        String ip = request.getHeader("X-Forwarded-For");  
3.        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  
4.            ip = request.getHeader("Proxy-Client-IP");  
5.        }  
6.        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  
7.            ip = request.getHeader("WL-Proxy-Client-IP");  
8.        }  
9.        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  
10.            ip = request.getHeader("HTTP_CLIENT_IP");  
11.        }  
12.        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  
13.            ip = request.getHeader("HTTP_X_FORWARDED_FOR");  
14.        }  
15.        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  
16.            ip = request.getRemoteAddr();  
17.        }  
18.        return ip;  
19.    }