在项目中获取客户端IP地址

在项目中记录日志时一般需要记录客户端的IP地址，如何获取呢？下面是一个封装的方法：

/**
 * 获取Ip地址
 * @return
 */
protected String getIpAddr() {
	HttpServletRequest request = ServletActionContext.getRequest();
	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.getRemoteAddr();
	}
	return ip;
}

另外一种：

String s = request.getRemoteAddr(); 
if (s.equals("127.0.0.1"))
	s = InetAddress.getLocalHost().getHostAddress();