How to implement multiple file uploads based on Swagger 3.x in Spring boot 3.x

How to implement multiple file uploads based on Swagger 3.x in Spring boot 3.x

• Project

Project

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.2.3</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <groupId>com.qwfys.sample</groupId>
    <artifactId>upload-sample</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <name>upload-sample</name>
    <description>upload-sample</description>

    <properties>
        <java.version>17</java.version>
        <swagger.starter.version>1.9.1.RELEASE</swagger.starter.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>        
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springdoc</groupId>
            <artifactId>springdoc-openapi-starter-webmvc-ui</artifactId>
            <version>2.0.3</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

OpenAPIConfig

package com.qwfys.sample.upload.base.config;

import io.swagger.v3.oas.models.OpenAPI;
import io.swagger.v3.oas.models.info.Contact;
import io.swagger.v3.oas.models.info.Info;
import io.swagger.v3.oas.models.info.License;
import io.swagger.v3.oas.models.servers.Server;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.List;

@Configuration
public class OpenAPIConfig {

    @Value("${app.openapi.dev-url}")
    private String devUrl;

    @Value("${app.openapi.prod-url}")
    private String prodUrl;

    @Bean
    public OpenAPI myOpenAPI() {
        Server devServer = new Server();
        devServer.setUrl(devUrl);
        devServer.setDescription("Server URL in Development environment");

        Server prodServer = new Server();
        prodServer.setUrl(prodUrl);
        prodServer.setDescription("Server URL in Production environment");

        Contact contact = new Contact();
        contact.setEmail("[e-mail]");
        contact.setName("qwfys200");
        contact.setUrl("https://www.qwfys.com");

        License mitLicense = new License().name("MIT License").url("https://choosealicense.com/licenses/mit/");

        Info info = new Info()
                .title("Tutorial Management API")
                .version("1.0")
                .contact(contact)
                .description("This API exposes endpoints to manage tutorials.").termsOfService("https://www.bezkoder.com/terms")
                .license(mitLicense);

        return new OpenAPI().info(info).servers(List.of(devServer, prodServer));
    }
}

FileUploadController

package com.qwfys.sample.upload.controller;

import io.swagger.v3.oas.annotations.Parameter;
import io.swagger.v3.oas.annotations.tags.Tag;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;


@Tag(name = "Tutorial", description = "Tutorial management APIs")
@RestController
public class FileUploadController {

    private static final Logger logger = LoggerFactory.getLogger(FileUploadController.class);

    @RequestMapping(value = "/uploadMultiFiles", consumes = {"multipart/form-data"}, method = RequestMethod.POST)
    public String uploads(@RequestPart(required = true) MultipartFile[] files) {
        logger.info("File Upload:{}", files);
        return "sucessfull";
    }

    @RequestMapping(value = "/uploadMultiFile", consumes = {"multipart/form-data"}, method = RequestMethod.POST)
    public String uploads(@RequestPart(required = true) MultipartFile file) {
        logger.info("File Upload:{}", file);
        return "sucessfull";
    }
}

application.yaml

spring:
  servlet:
    multipart:
      max-file-size: 5MB
      max-request-size: 5MB
      enabled: true
      location: ${java.io.tmpdir}

app:
  openapi:
    dev-url: http://localhost:8080
    prod-url: https://api.qwfys.com/sample