String MVC 로그인처리

MemberController

@Slf4j
@Controller
@RequestMapping("/member")
@RequiredArgsConstructor
public class MemberController {

    private final LoginValidator loginValidator;
    private final LoginService loginService;


    @GetMapping("/login")
    public String login(@ModelAttribute RequestLogin form, @CookieValue(name="savedEmail", required = false) String savedEamil, @SessionAttribute(name="member", required = false) Member member) {
        if(member != null) {
            log.info(member.toString());
        }

        if(savedEamil != null){
            form.setSaveEmail(true);
            form.setEmail(savedEamil);
        }
        return "member/login";
    }


    @PostMapping("/login")
    public String loginPs(@Valid RequestLogin form, Errors errors) {
        loginValidator.validate(form, errors);
        if (errors.hasErrors()) {
            return "member/login";
        }
        loginService.process(form);

        return "redirect:/";
    }

    @RequestMapping("/logout")
    public String logout(HttpSession session){
        session.invalidate(); //세션비우기

        return "redirect:/member/login";
    }

}

RequestLogin.java

@Data
public class RequestLogin {
    @NotBlank
    private String email;

    @NotBlank
    private String password;

    private boolean saveEmail;
}

login.jsp

<%@ page contentType="text/html; charset=UTF-8" %>
<%@ taglib prefix="c" uri="jakarta.tags.core" %>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %>

<c:url var="actionUrl" value="/member/login" />
<spring:message var="saveEmailTitle" code='이메일_기억하기' />

<h1>
    <spring:message code="로그인" />
</h1>

<form:form method="post" action="${actionUrl}" autocomplete="off" modelAttribute="requestLogin">
    <dl>
        <dt>
            <spring:message code="이메일" />
        </dt>
        <dd>
            <form:input path="email" />
            <form:errors path="email" />
        </dd>
    </dl>
    <dl>
        <dt>
            <spring:message code="비밀번호" />
        </dt>
        <dd>
            <form:password path="password" />
            <form:errors path="password" />
        </dd>
    </dl>
    <div>
        <form:checkbox path="saveEmail" value="true" label="${saveEmailTitle}" />
    </div>

    <form:errors element="div" delimiter="" />

    <button type="submit">
        <spring:message code="로그인" />
    </button>
</form:form>

LoginValidator

@Component
@RequiredArgsConstructor
public class LoginValidator implements Validator {

    private final MemberMapper mapper;

    @Override
    public boolean supports(Class<?> clazz) {
        return clazz.isAssignableFrom(RequestLogin.class);
    }

    @Override
    public void validate(Object target, Errors errors) {

        //Bean Validation 검증 실패시에는 다음 검증을 진행 X
        if (errors.hasErrors()) {
            return;
        }
        /**
         * 2) email로 회원이 조회 되는지 검증
         * 3) 조회된 회원의 비밀번호가 입력한 값과 일치하는지 검증
         */
        RequestLogin form = (RequestLogin)target;
        String email = form.getEmail();
        String password = form.getPassword(); // 사용자가 입력한 비밀번호

        if (StringUtils.hasText(email)) {
            Member member = mapper.get(email);
            if (member == null) {
                //errors.rejectValue("email", "Check.emailPassword");
                errors.reject("Check.emailPassword");
            }


            if (member != null && StringUtils.hasText(password) && !BCrypt.checkpw(password, member.getPassword())) {
                //errors.rejectValue("password", "Check.emailPassword");
                errors.reject("Check.emailPassword");
            }
        }
    }
}

LoginService

@Service
@RequiredArgsConstructor
public class LoginService {

    private final MemberMapper mapper;
    private final HttpSession session;
    private final HttpServletResponse response;

    public void process(String email) {
        /**
         * 1.email로 회원조회
         * 2. 세션에 회원 정보 유지
         */
        Member member = mapper.get(email);
        if(email==null){
            return;
        }
        session.setAttribute("member", member);
    }

    public void process(RequestLogin form) {
        process(form.getEmail()); //로그인처리

        /* 이메일 기억하기 처리 */
        Cookie cookie = new Cookie("savedEmail", form.getEmail());
        if(form.isSaveEmail()){ //쿠키등록
            cookie.setMaxAge(60 * 60 * 24 * 7); //7일간 쿠키유지
        }else{
            cookie.setMaxAge(0); //쿠키제거
        }

        response.addCookie(cookie); //해당 쿠키가 삭제 or 등록
    }
}