Spring boot java server spring security JPA 예외 처리 ck editor React file upload OAuth JWT Filter bean pk 복호화 pk 암호화 위도 경도를 이용한 거리 계산 entity life cycle persistent framework react 상태 갱신 Dekker DelegatingFilterProxy custom hook useContext controlleradvice FetchType entitymanager HandlerExceptionResolver 생성자 주입 BasicErrorController Composite Pattern ResponseEntity axios Decorator pattern RestClient querydsl GRPC restful api REST API node.js nginx Spring DI application context Observer Pattern 함수형 프로그래밍 Builder Pattern Command Pattern Template Method Pattern iterator pattern web server Singleton Pattern factory Pattern Interceptor was 로드밸런싱 adapter pattern strategy pattern state pattern AOP token proxy Email singleton session 인가 Spring POJO 인증 apache