获取客户端请求的真实ip地址

public String getIp(HttpServletRequest request, HttpServletResponse response) throws Exception {
String loginip = "";
if (request.getHeader("x-forwarded-for") == null) {
loginip = request.getRemoteAddr();
} else {
loginip = request.getHeader("x-forwarded-for");
}
return loginip;
}