[SpringBoot] 회원가입 api구현

인증 · 보안 기능 없는 회원가입 api

 

내 자력으로 코드를 작성했기보다는 chatGPT - Comma... 도움을 많이 받았기에 많이 아쉽다. 다음 회원가입 api구현에는 도움을 받지 않고 작성할만큼 성장하고 싶다.

 

프로젝트 전체 구조

src
└── main
    └── java
        └── com
            └── example
                └── Backend
                    └── Study
                        ├── BackendStudyApplication.java
                        ├── controller
                        │   └── UserController.java
                        ├── dto
                        │   └── UserDto.java
                        ├── entity
                        │   └── User.java
                        ├── repository
                        │   └── UserRepository.java
                        └── service
                            └── UserService.java

 

Controller

UserController.java

- 사용자 등록과 관련된 REST API 엔드포인트를 정의

// src/main/java/com/example/Backend/Study/controller/UserController.java

package com.example.Backend.Study.controller;

import com.example.Backend.Study.dto.UserDto;
import com.example.Backend.Study.entity.User;
import com.example.Backend.Study.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;

@RestController
@RequestMapping("/api/users")
public class UserController {

    @Autowired
    private UserService userService;

    @PostMapping("/register")
    public ResponseEntity<User> registerUser(@RequestBody UserDto userDto) {
        User user = userService.registerUser(userDto);
        return new ResponseEntity<>(user, HttpStatus.CREATED);
    }
}

 

 

Service

UserService.java

- 비즈니스 로직 처리하는 서비스 계층

// src/main/java/com/example/Backend/Study/service/UserService.java

package com.example.Backend.Study.service;

import com.example.Backend.Study.dto.UserDto;
import com.example.Backend.Study.entity.User;
import com.example.Backend.Study.repository.UserRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class UserService {

    @Autowired
    private UserRepository userRepository;

    public User registerUser(UserDto userDto) {
        User user = new User();
        user.setUsername(userDto.getUsername());
        user.setPassword(userDto.getPassword());
        return userRepository.save(user);
    }
}

 

 

Dto

UserDto.java

- 데이터 전송 객체(DTO)

- 사용자 등록 시 사용

// src/main/java/com/example/Backend/Study/dto/UserDto.java

package com.example.Backend.Study.dto;

public class UserDto {
    private String username;
    private String password;

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}

 

 

entity

User.java

- JPA Entity로 데이터베이스의 사용자 테이블과 매핑

// src/main/java/com/example/Backend/Study/entity/User.java

package com.example.Backend.Study.entity;

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

@Entity
public class User {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    private String username;
    private String password;

    // Getter and Setter methods
    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}

 

 

repository

UserRepository.java

- 사용자 엔티티와 데이터베이스 상호작용 담당하는 JPA 리포지토리

// src/main/java/com/example/Backend/Study/repository/UserRepository.java

package com.example.Backend.Study.repository;

import com.example.Backend.Study.entity.User;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

@Repository
public interface UserRepository extends JpaRepository<User, Long> {
}