[Server] Nginx와 tomcat 연동시 tomcat에서 client ip 받는 방법

 HttpServletRequest req = ((ServletRequestAttributes) RequestContextHolder.currentRequestAttributes()).getRequest();
//                    String ip = req.getRemoteAddr();
                    //nginx에서 주는 ip를 사용해야함.
                    String ip = req.getHeader("X-Forwarded-For");

참고1 : https://coderanch.com/t/445496/request-getRemoteAddr

참고2 : https://www.lesstif.com/pages/viewpage.action?pageId=20775886