스프링 ArgumentResolver

컨트롤러

@Login 어노테이션 등록(사용자가 만들어줘야함)

    @GetMapping("/")
    public String homeLoginV3ArgumentResolver(@Login Member loginMember, Model model){

        // 세션에 회원 데이터가 없으면 home
        if (loginMember == null) {
            return "home";
        }

        // 세션이 유지되면 로그인으로 이동동
        model.addAttribute("member", loginMember);
        return "loginHome";
    }

 

@Login

package hello.login.web.argumentresolver;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Target(ElementType.PARAMETER)
@Retention(RetentionPolicy.RUNTIME)
public @interface Login {
}

 

ArgumentResolver 생성

// supportsParameter 함수가 true 이면 실행

package hello.login.web.argumentresolver;

import hello.login.domain.member.Member;
import hello.login.web.SessionConst;
import lombok.extern.slf4j.Slf4j;
import org.springframework.core.MethodParameter;
import org.springframework.web.bind.support.WebDataBinderFactory;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.method.support.ModelAndViewContainer;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

@Slf4j
public class LoginMemberArgumentResolver implements HandlerMethodArgumentResolver {


    @Override
    public boolean supportsParameter(MethodParameter parameter) {
        log.info("supportsParameter 실행");

        boolean hasLoginAnnotation = parameter.hasParameterAnnotation(Login.class);
        boolean hasMemberType = Member.class.isAssignableFrom(parameter.getParameterType());
        return hasLoginAnnotation && hasMemberType;


    }

    // supportsParameter 함수가 true 이면 실행
    @Override
    public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer, NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {

        log.info("resolveArgument 실행");
        HttpServletRequest request = (HttpServletRequest) webRequest.getNativeRequest();
        HttpSession session = request.getSession(false);
        if (session == null) {
            return null;
        }

        return session.getAttribute(SessionConst.LOGIN_MEMBER);
    }
}

ArgumentResolver 스프링 빈 등록

package hello.login;

import hello.login.web.argumentresolver.LoginMemberArgumentResolver;
import hello.login.web.filter.LogFilter;
import hello.login.web.filter.LoginCheckFilter;
import hello.login.web.interceptor.LogInterceptor;
import hello.login.web.interceptor.LoginCheckInterceptor;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import javax.servlet.Filter;
import java.util.List;

@Configuration
public class WebConfig implements WebMvcConfigurer {

    @Override
    public void addArgumentResolvers(List<HandlerMethodArgumentResolver> resolvers) {
        resolvers.add(new LoginMemberArgumentResolver());
    }

}