15. 로그인, 로그아웃하기v3

1. View 보기

{{> /layout/header}}

<div class="container p-5">

    <!-- 요청을 하면 localhost:8080/login POST로 요청됨
    username=사용자입력값&password=사용자값 -->
    <div class="card">
        <div class="card-header"><b>로그인을 해주세요</b></div>
        <div class="card-body">
            <form action="/login" method="post" enctype="application/x-www-form-urlencoded">
                <div class="mb-3">
                    <input type="text" class="form-control" placeholder="Enter username" name="username" value="ssar">
                </div>
                <div class="mb-3">
                    <input type="password" class="form-control" placeholder="Enter password" name="password" value="1234">
                </div>
                <button type="submit" class="btn btn-primary form-control">로그인</button>
            </form>
        </div>
    </div>
</div>

{{> /layout/footer}}

2. UserRepository 에 findByUsernameAndPassword() 만들기

package shop.mtcoding.blog.user;

import jakarta.persistence.EntityManager;
import jakarta.persipackage shop.mtcoding.blog.user;

import jakarta.persistence.EntityManager;
import jakarta.persistence.Query;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Repository;

@RequiredArgsConstructor
@Repository
public class UserRepository {

    private final EntityManager em;

    public User findByUsernameAndPassword(UserRequest.LoginDTO reqDTO){
        Query query =
                em.createQuery("select u from User u where u.username = :username and u.password =:password", User.class);
        query.setParameter("username", reqDTO.getUsername());
        query.setParameter("password", reqDTO.getPassword());
        return (User) query.getSingleResult();
    }
}
stence.Query;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Repository;

@RequiredArgsConstructor
@Repository
public class UserRepository {

    private final EntityManager em;

    public User findByUsername(String username){
        Query query = em.createQuery("select u from User u where u.username = :username", User.class);
        query.setParameter("username", username);
        return (User) query.getSingleResult();
    }
}

• 단위 테스트하기

package shop.mtcoding.blog.User;

import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
import org.springframework.context.annotation.Import;
import shop.mtcoding.blog.user.User;
import shop.mtcoding.blog.user.UserRepository;
import shop.mtcoding.blog.user.UserRequest;

@Import(UserRepository.class) // IoC 등록코드
@DataJpaTest // Datasource(connection pool), EntityManager
public class UserRepositoryTest {

    @Autowired // DI
    private UserRepository userRepository;

    @Test
    public void findByUsername_test(){
        // given
        UserRequest.LoginDTO reqDTO = new UserRequest.LoginDTO();
        reqDTO.setUsername("ssar");
        reqDTO.setPassword("1234");

        // when
        User user = userRepository.findByUsernameAndPassword(reqDTO);

        // then
    }
}

2. UserRequest 만들어서 LoginDTO 만들기

package shop.mtcoding.blog.user;

import lombok.Data;

public class UserRequest {

    @Data
    public static class LoginDTO{
        private String username;
        private String password;
    }
}

3. UserController 에 login 만들기

package shop.mtcoding.blog.user;

import jakarta.servlet.http.HttpSession;
import lombok.NoArgsConstructor;
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 UserRepository userRepository;
    private final HttpSession session;

    @PostMapping("/login")
    public String login(UserRequest.LoginDTO reqDTO) {
        User sessionUser = userRepository.findByUsernameAndPassword(reqDTO);
        session.setAttribute("sessionUser", sessionUser);
        return "redirect:/";
    }

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

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

    @GetMapping("/user/update-form")
    public String updateForm() {
        return "user/update-form";
    }

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

4.

package shop.mtcoding.blog.user;

import jakarta.servlet.http.HttpSession;
import lombok.NoArgsConstructor;
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 UserRepository userRepository;
    private final HttpSession session;

    @PostMapping("/login")
    public String login(UserRequest.LoginDTO reqDTO) {
        User sessionUser = userRepository.findByUsernameAndPassword(reqDTO);
        session.setAttribute("sessionUser", sessionUser);
        return "redirect:/";
    }

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

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

    @GetMapping("/user/update-form")
    public String updateForm() {
        return "user/update-form";
    }

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