Web项目中得到访问者的真实ip

Web项目中得到访问者的真实ip

描述：最近要实现个功能是要记录管理员登录的真实ip，但在项目中如果直接使用request.getRemoteAddr()获得ip的话，获得的可能不是真实ip，是因为使用代理的一些原因，所以我们要自己找个方法，具体方法如下：

public class Utils {

	/**
	 * 获取ip
	 * @param request
	 * @return
	 */
	public static String getIp(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;
	}

}

这样就能去除代理的一些因素，得到真实的ip。