ip判断

java web 取用户真实ip..包括部分使用代理服务器来上网的用户。但好象对高度匿名的代理服务器是无效的。

public String getIpAddr(HttpServletRequest request) {
		String ip = request.getHeader("X-Forwarded-For");
		if (ip == null || ip.length() == 0) {
			ip = request.getHeader("Proxy-Client-IP");
		}
		if (ip == null || ip.length() == 0) {
			ip = request.getHeader("WL-Proxy-Client-IP");
		}
		if (ip == null || ip.length() == 0) {
			ip = request.getRemoteAddr();
		}
		return ip;
	}