[스프링부트] 27. 스프링부트 뱅크 v1 로그인

로그인 로직 추가 코드 (BOLD체)

UserController

package com.metacoding.bankv1.user;

import jakarta.servlet.http.HttpSession;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;

@RequiredArgsConstructor
@Controller
public class UserController {
    private final UserService userService;
    private final HttpSession session;

    @GetMapping("/logout")
    public String logout() {
        session.invalidate();
        return "redirect:/";
    }

    // 로그인만 예외로 Post (조회시에도) @POST (조회시에도) body에 던져야 하니까 password
    @PostMapping("/login")
    public String login(UserRequest.LoginDTO loginDTO) {
        User sessionUser = userService.로그인(loginDTO);
        session.setAttribute("sessionUser", sessionUser); // stateful
        return "redirect:/";
    }

    @GetMapping("/login-form")
    public String loginForm() {
        return "user/login-form";
    }

    @GetMapping("/join-form")
    public String joinForm() {
        return "user/join-form";
    }

    @PostMapping("/join")
    public String join(UserRequest.JoinDTO joinDTO) {
        userService.회원가입(joinDTO);
        return "redirect:/login-form";
    }
}

UserService

    public User 로그인(UserRequest.LoginDTO loginDTO) {
        // 1. 해당 유저네임이 있나?
        User user = userRepository.findByUsername(loginDTO.getUsername());

        // 2. 필터링 (유저네임, 패스워드가 불일치하는 것들을)
        if (user == null) {
            throw new RuntimeException("해당 username이 없습니다");
        }

        if (!(user.getPassword().equals(loginDTO.getPassword()))) {
            throw new RuntimeException("해당 password가 틀렸습니다");
        }

        // 3. 인증
        return user;
    }

header.mustache

                {{#sessionUser}}
                    <li class="nav-item">
                        <a class="nav-link" href="/account">계좌목록</a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link" href="/account/save-form">계좌생성</a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link" href="account/transfer-form">이체하기</a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link" href="/logout">로그아웃</a>
                    </li>
                {{/sessionUser}}
                {{^sessionUser}}
                    <li class="nav-item">
                        <a class="nav-link" href="/join-form">회원가입</a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link" href="/login-form">로그인</a>
                    </li>
                {{/sessionUser}}