获取访问站点用户的IP地址

转 http://lidaoping12345.iteye.com/blog/1533734

获取用户的IP地址，作为防钓鱼的一种方法
String clientIp = request.getHeader("x-forwarded-for");
        if ((clientIp == null) || (clientIp.length() == 0)
                || ("unknown".equalsIgnoreCase(clientIp))) {
            clientIp = request.getHeader("Proxy-Client-IP");
        }
        if ((clientIp == null) || (clientIp.length() == 0)
                || ("unknown".equalsIgnoreCase(clientIp))) {
            clientIp = request.getHeader("WL-Proxy-Client-IP");
        }
        if ((clientIp == null) || (clientIp.length() == 0)
                || ("unknown".equalsIgnoreCase(clientIp))) {
            clientIp = request.getRemoteAddr();
        }
        String ipAddress = clientIp;
有时候可能会根据本公司的nginx的设置，根据具体的来更改上面代码，从而获取ip地址