JAVA 프로젝트 기본세팅

 

 

1. 프로젝트 구조설정

src/main/java/com/example/loginapp/
│
├── config/        # Spring Security 설정
├── controller/    # 프레젠테이션 계층
├── service/       # 서비스 계층
├── repository/    # 저장소 계층
└── domain/        # 도메인 계층

 

2. 도메인 계층 설정

src/main/java/com/example/loginapp/domain/User.java

package com.example.loginapp.domain;

import jakarta.persistence.Entity;
import jakarta.persistence.GeneratedValue;
import jakarta.persistence.GenerationType;
import jakarta.persistence.Id;
import lombok.Data;

@Entity
@Data
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    
    private String username;
    private String password;
    private String role;
}

 

3. 저장소 계층 설정

src/main/java/com/example/loginapp/repository/UserRepository.java

package com.example.loginapp.repository;

import com.example.loginapp.domain.User;
import org.springframework.data.jpa.repository.JpaRepository;

import java.util.Optional;

public interface UserRepository extends JpaRepository<User, Long> {
    Optional<User> findByUsername(String username);
}

 

4. 서비스 계층 설정

src/main/java/com/example/loginapp/service/UserService.java

package com.example.loginapp.service;

import com.example.loginapp.domain.User;
import com.example.loginapp.repository.UserRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.stereotype.Service;

import java.util.Optional;

@Service
public class UserService {
    
    @Autowired
    private UserRepository userRepository;

    @Autowired
    private PasswordEncoder passwordEncoder;

    public Optional<User> findByUsername(String username) {
        return userRepository.findByUsername(username);
    }

    public User save(User user) {
        user.setPassword(passwordEncoder.encode(user.getPassword()));
        return userRepository.save(user);
    }
}

 

5. Spring Security 설정

src/main/java/com/example/loginapp/config/SecurityConfig.java

package com.example.loginapp.config;

import com.example.loginapp.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private UserService userService;

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(username -> userService.findByUsername(username)
                .orElseThrow(() -> new UsernameNotFoundException("User not found")))
                .passwordEncoder(passwordEncoder());
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            .csrf().disable()
            .authorizeRequests()
                .antMatchers("/login", "/register").permitAll()
                .anyRequest().authenticated()
                .and()
            .formLogin()
                .loginPage("/login")
                .defaultSuccessUrl("/", true)
                .permitAll()
                .and()
            .logout()
                .permitAll();
    }

    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }
}

 

6. 프레젠테이션 계층 설정

src/main/java/com/example/loginapp/controller/AuthController.java

package com.example.loginapp.controller;

import com.example.loginapp.domain.User;
import com.example.loginapp.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;

@RestController
@RequestMapping("/auth")
public class AuthController {

    @Autowired
    private UserService userService;

    @PostMapping("/register")
    public ResponseEntity<String> register(@RequestBody User user) {
        userService.save(user);
        return ResponseEntity.ok("User registered successfully");
    }

    @GetMapping("/login")
    public ResponseEntity<String> login() {
        return ResponseEntity.ok("Login page");
    }
}

 

7. 데이터베이스 설정 (H2 예제)

src/main/resources/application.properties

spring.datasource.url=jdbc:h2:mem:testdb
spring.datasource.driverClassName=org.h2.Driver
spring.datasource.username=sa
spring.datasource.password=password
spring.h2.console.enabled=true
spring.jpa.hibernate.ddl-auto=update
spring.jpa.show-sql=true

 

8. 실행 및 테스트

프로젝트를 실행하고 브라우저 또는 Postman과 같은 도구를 사용하여 로그인 및 회원가입 API를 테스트할 수 있습니다.

회원가입: POST /auth/register 엔드포인트에 username, password, role을 포함한 JSON 데이터를 전송합니다.
로그인: Spring Security의 기본 로그인 폼을 사용하거나 직접 만든 /auth/login 엔드포인트로 로그인할 수 있습니다.

 

이렇게 설정하면 Spring Boot 기반의 레이어드 아키텍처로 로그인 API를 구현한 기본적인 프로젝트가 완성됩니다. 필요에 따라 추가적인 기능과 보안 설정을 확장해 나갈 수 있습니다.