[스프링부트] 파일 업로드v1

Dec 05, 2024

Contents

Gradle


plugins {
    id 'java'
    id 'org.springframework.boot' version '3.4.0'
    id 'io.spring.dependency-management' version '1.1.6'
}

group = 'com.example'
version = '0.0.1-SNAPSHOT'

java {
    toolchain {
        languageVersion = JavaLanguageVersion.of(21)
    }
}

configurations {
    compileOnly {
        extendsFrom annotationProcessor
    }
}

repositories {
    mavenCentral()
}

dependencies {
    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
    implementation 'org.springframework.boot:spring-boot-starter-mustache'
    implementation 'org.springframework.boot:spring-boot-starter-web'
    compileOnly 'org.projectlombok:lombok'
    developmentOnly 'org.springframework.boot:spring-boot-devtools'
    runtimeOnly 'com.h2database:h2'
    annotationProcessor 'org.projectlombok:lombok'
    testImplementation 'org.springframework.boot:spring-boot-starter-test'
    testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
}

tasks.named('test') {
    useJUnitPlatform()
}

properties


server.servlet.encoding.charset=UTF-8
server.servlet.encoding.force=true

spring.datasource.driver-class-name=org.h2.Driver
spring.datasource.url=jdbc:h2:mem:test
spring.datasource.username=sa

spring.jpa.hibernate.ddl-auto=create
spring.jpa.show-sql=true
spring.jpa.properties.hibernate.format_sql=true

View - mustache


<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Document</title>
</head>
<body>
    <h1>사진 파일 전송</h1>
    <hr>
    <form action="/v1/upload" method="post" enctype="multipart/form-data">
        <input type="text" name="username"><br>
        <input type="file" name="img" accept="image/*"><br>
        <input type="submit">
    </form>
</body>
</html>

WebConfig



import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

@Configuration
public class WebConfig implements WebMvcConfigurer {
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        WebMvcConfigurer.super.addResourceHandlers(registry);
        // 1. 절대경로 file:///c:/upload/
        // 2. 상대경로 file:./upload/
        registry
                .addResourceHandler("/upload/**") // html에서 경로를 적으면
                .addResourceLocations("file:" + "./images/") // 웹서버의 /images/ 폴더 경로를 찾음
                .setCachePeriod(60 * 60); // 초 단위 => 한시간

    }
}

Entity



import jakarta.persistence.*;
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Getter;
import lombok.NoArgsConstructor;

@Getter
@Entity
@NoArgsConstructor
@Table(name = "upload_tb")
public class Upload {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;
    private String username;
    private String profileUrl;

    @Builder
    public Upload(Integer id, String username, String profileUrl) {
        this.id = id;
        this.username = username;
        this.profileUrl = profileUrl;
    }
}


import lombok.Data;
import org.springframework.web.multipart.MultipartFile;

public class UploadRequest {
    @Data
    public static class V1DTO{
        private String username;
        private MultipartFile img;

        public Upload toEntity(String profile){
            return Upload.builder().username(username).profileUrl(profile).build();
        }

    }
}

Controller


import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;

@Controller
@RequiredArgsConstructor
public class UploadController {

    private final UploadService uploadService;

    // form 태그 이용
    @GetMapping("/file1")
    public String file1() {
        return "file1";
   }
   // View에서 데이터를 v1DTO로 매핑해서 받음
    @PostMapping("/v1/upload")
    public String v1Upload(UploadRequest.V1DTO v1DTO) {
        uploadService.v1사진저장(v1DTO);
        return "index";
    }
}

Service


import jakarta.transaction.Transactional;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Service;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.UUID;

@RequiredArgsConstructor
@Service
public class UploadService {

    private final UploadRepository uploadRepository;

    @Transactional
    public void v1사진저장(UploadRequest.V1DTO v1DTO){
        // 1. DTO에 사진파일명을 롤링 시킨다.
        // UUID를 사용하여 파일에 고유식별자를 붙인다.
        String imgName = UUID.randomUUID()+"_"+v1DTO.getImg().getOriginalFilename();
        String profileUrl = "images/"+imgName;
        String dbUrl = "/upload/"+imgName;
        // 2. DTO에 사진을 파일로 저장 (images 폴더)
        try {
		        //images라는 폴더에 파일을 저장 
            Path path = Paths.get(profileUrl);
            Files.write(path, v1DTO.getImg().getBytes());
            // DB에 위치 + 고유식별자 + 파일이름을 저장
            uploadRepository.save(v1DTO.toEntity(dbUrl));
        } catch (IOException e) {
            throw new RuntimeException(e.getMessage());
        }
    }
}

Repository


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

@Repository
@RequiredArgsConstructor
public class UploadRepository {
    private final EntityManager em;

    public void save(Upload upload) {
        em.persist(upload);
    }
}

See more posts

[스프링부트] 파일 업로드v1

multiparty/form- data를 이용한 파일 업로드

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