一、使用Docker安装minio

docker run -d -p 9000:9000 -p 9001:9001 --name minio -e MINIO_ACCESS_KEY=qbb -e MINIO_SECRET_KEY=startqbb -v /opt/minio/data:/data -v /opt/minio/config:/root/.minio minio/minio server /data --console-address ":9000" --address ":9001"

• MINIO_ACCESS_KEY:指定的是"用户名",可以这么理解,后面我们文件上传需要使用
• MINIO_SECRET_KEY:指定的是"密码",可以这么理解,后面我们文件上传需要使用

二、创建一个Project工程（我是用的是Gradle，大家也可以使用Maven）

三、实现文件上传

1、导入相关依赖

plugins {
    id 'java'
}

group 'com.qbb'
version '1.0-SNAPSHOT'

repositories {
    mavenCentral()
}

dependencies {
    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.8.1'
    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.8.1'
    implementation 'org.springframework.boot:spring-boot-starter-web:2.7.3'
    implementation 'mysql:mysql-connector-java:8.0.29'
    implementation 'org.springframework.boot:spring-boot-starter-test:2.7.3'
    implementation 'org.projectlombok:lombok:1.18.24'
    implementation 'io.springfox:springfox-swagger2:3.0.0'
    implementation 'io.springfox:springfox-swagger-ui:3.0.0'
    implementation 'io.minio:minio:8.4.3'
}

test {
    useJUnitPlatform()
}

2、修改配置文件

# application.yml
server:
  port: 8080

spring:
  profiles:
    active: dev
#    include: dev
  application:
    name: minio

  #  这个mvc的配置是springboot2.6.1不支持swagger3的折衷配置，后面考虑升级Springboot版本或降级版本
  mvc:
    pathmatch:
      matching-strategy: ant_path_matcher

  servlet:
    multipart:
      # 设置 上传文件的大小
      max-file-size: 100MB
      # 设置 整个请求的大小
      max-request-size: 150MB
	  
	  
# application-dev.yml
swagger:
  enabled: true

app:
  minio:
    endpoint: http://192.168.119.159:9001
    accessKey: qbb
    secretKey: startqbb
    bucket: qbb

3、主启动类

package com.qbb.minio;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * @author QiuQiu&LL (个人博客:https://www.cnblogs.com/qbbit)
 * @version 1.0
 * @date 2022-09-19  15:45
 * @Description:
 */
@SpringBootApplication
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

4、Swagger3配置类

package com.qbb.minio.config;


import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.oas.annotations.EnableOpenApi;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.service.Contact;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;

/**
 * @author QiuQiu&LL (个人博客:https://www.cnblogs.com/qbbit)
 * @version 1.0
 * @date 2022-09-19  15:45
 * @Description: Swagger配置
 */
@Configuration
@EnableOpenApi
public class SwaggerConfig {

    @Value("${swagger.enabled}")
    boolean swaggerEnabled;

    @Value("${spring.application.name}")
    String name;

    @Bean
    public Docket createRestApi() {
        return new Docket(DocumentationType.OAS_30).apiInfo(apiInfo())
                // 是否开启
                .enable(swaggerEnabled).select()
                // 扫描的路径使用@Api的controller
                .apis(RequestHandlerSelectors.withMethodAnnotation(ApiOperation.class))
                // 指定路径处理PathSelectors.any()代表所有的路径
                .paths(PathSelectors.any()).build();
    }

    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                .title("Swagger3接口文档")
                .description(name + "接口文档")
                //作者信息
                .contact(new Contact("startqbb", "https://www.cnblogs.com/qbbit", "[email protected]"))
                .version("1.0")
                .build();
    }

}

5、Minio配置类

package com.qbb.minio.config;

import io.minio.MinioClient;
import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * @author QiuQiu&LL (个人博客:https://www.cnblogs.com/qbbit)
 * @version 1.0
 * @date 2022-09-19  15:57
 * @Description:
 */
@EnableConfigurationProperties
@ConfigurationProperties(prefix = "app.minio")
@Configuration
@Data
public class MinioConfig {

    private String endpoint;
    private String accessKey;
    private String secretKey;
    private String bucket;

    @Bean
    public MinioClient minioClient() {
        return MinioClient.builder()
                .endpoint(endpoint)
                .credentials(accessKey, secretKey)
                .build();
    }
}

6、Minio工具类

package com.qbb.minio.util;

import com.qbb.minio.config.MinioConfig;
import io.minio.*;
import io.minio.http.Method;
import io.minio.messages.Bucket;
import io.minio.messages.DeleteObject;
import io.minio.messages.Item;
import lombok.extern.slf4j.Slf4j;
import org.junit.platform.commons.util.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.util.FastByteArrayOutputStream;
import org.springframework.web.multipart.MultipartFile;

import javax.annotation.Resource;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.UUID;

/**
 * @author QIUQIU&LL (个人博客:https://www.cnblogs.com/qbbit)
 * @version 1.0
 * @date 2022-09-19  16:44
 * @Description:
 */
@Component
@Slf4j
public class MinioUtil {

    @Autowired
    private MinioConfig minioConfig;

    @Resource
    private MinioClient minioClient;

    /**
     * 查看存储bucket是否存在
     *
     * @return boolean
     */
    public Boolean bucketExists(String bucketName) {
        boolean found;
        try {
            found = minioClient.bucketExists(BucketExistsArgs.builder().bucket(bucketName).build());
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
        return found;
    }

    /**
     * 创建存储bucket
     */
    public void makeBucket(String bucketName) {
        try {
            minioClient.makeBucket(MakeBucketArgs.builder()
                    .bucket(bucketName)
                    .build());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 删除存储bucket
     *
     * @return Boolean
     */
    public Boolean removeBucket(String bucketName) {
        try {
            minioClient.removeBucket(RemoveBucketArgs.builder()
                    .bucket(bucketName)
                    .build());
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
        return true;
    }

    /**
     * 获取全部bucket
     */
    public List<Bucket> getAllBuckets() {
        try {
            return minioClient.listBuckets();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }


    /**
     * 文件上传
     *
     * @param file 上传的文件
     * @return
     */
    public String upload(MultipartFile file) {
        String originalFilename = file.getOriginalFilename();
        if (StringUtils.isBlank(originalFilename)) {
            throw new RuntimeException();
        }
        String fileName = UUID.randomUUID().toString().replace("-", "") + "_" + originalFilename;
        // 日期目录
        // SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd");
        // String datePath = dateFormat.format(new Date());// 日期目录：2021/10/27
        // 也可以使用JDK1.8的新时间类LocalDate/LocalDateTime
        LocalDate now = LocalDate.now();
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy/MM/dd");
        String formatDatePath = formatter.format(now);
        // 加一个时间戳
        long timeMillis = System.currentTimeMillis();
        String objectName = formatDatePath + "/" + timeMillis + fileName;
        try {
            PutObjectArgs objectArgs = PutObjectArgs.builder()
                    .bucket(minioConfig.getBucket())
                    .object(objectName)
                    .stream(file.getInputStream(), file.getSize(), -1)
                    .contentType(file.getContentType())
                    .build();
            minioClient.putObject(objectArgs);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
        return objectName;
    }

    /**
     * 预览图片
     *
     * @param fileName 文件名称
     * @return 图片地址
     */
    public String preview(String fileName) {
        // 查看文件地址
        GetPresignedObjectUrlArgs build = GetPresignedObjectUrlArgs.builder()
                .bucket(minioConfig.getBucket())
                .object(fileName)
                .method(Method.GET)
                .build();
        try {
            return minioClient.getPresignedObjectUrl(build);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 文件下载
     *
     * @param fileName 文件名称
     * @param res      response
     */
    public void download(String fileName, HttpServletResponse res) {
        GetObjectArgs objectArgs = GetObjectArgs.builder().bucket(minioConfig.getBucket())
                .object(fileName).build();
        try (GetObjectResponse response = minioClient.getObject(objectArgs)) {
            byte[] buf = new byte[1024];
            int len;
            try (FastByteArrayOutputStream os = new FastByteArrayOutputStream()) {
                while ((len = response.read(buf)) != -1) {
                    os.write(buf, 0, len);
                }
                os.flush();
                byte[] bytes = os.toByteArray();
                res.setCharacterEncoding("utf-8");
                // 设置强制下载不打开
                // res.setContentType("application/force-download");
                res.addHeader("Content-Disposition", "attachment;fileName=" + fileName);
                try (ServletOutputStream stream = res.getOutputStream()) {
                    stream.write(bytes);
                    stream.flush();
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 查看文件对象
     *
     * @return 存储bucket内文件对象信息
     */
    public List<Item> listObjects(String bucketName) {
        if (StringUtils.isBlank(bucketName) || !bucketExists(bucketName)) {
            return null;
        }
        Iterable<Result<Item>> results = minioClient.listObjects(
                ListObjectsArgs.builder().bucket(bucketName).build());
        List<Item> items = new ArrayList<>();
        try {
            for (Result<Item> result : results) {
                items.add(result.get());
            }
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
        return items;
    }


    /**
     * 获取单个桶中的所有文件对象名称
     *
     * @param bucket 桶名称
     * @return {@link List}<{@link String}>
     */
    public List<String> getBucketObjectName(String bucket) {
        boolean exsit = bucketExists(bucket);
        if (exsit) {
            List<String> listObjetcName = new ArrayList<>();
            try {
                Iterable<Result<Item>> myObjects = minioClient.listObjects(ListObjectsArgs.builder().bucket(bucket).build());
                for (Result<Item> result : myObjects) {
                    Item item = result.get();
                    listObjetcName.add(item.objectName());
                }
                return listObjetcName;
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return null;
    }

    /**
     * 删除
     *
     * @param fileName 文件名称
     * @return true|false
     */
    public boolean remove(String fileName) {
        try {
            minioClient.removeObject(RemoveObjectArgs.builder().bucket(minioConfig.getBucket()).object(fileName).build());
        } catch (Exception e) {
            return false;
        }
        return true;
    }

    /**
     * 批量删除文件
     *
     * @param bucket      桶名称
     * @param objectNames 对象名称
     * @return boolean
     */
    public boolean removeObjects(String bucket, List<String> objectNames) {
        boolean exsit = bucketExists(bucket);
        if (exsit) {
            try {
                List<DeleteObject> objects = new LinkedList<>();
                for (String str : objectNames) {
                    objects.add(new DeleteObject(str));
                }
                minioClient.removeObjects(RemoveObjectsArgs.builder().bucket(bucket).objects(objects).build());
                return true;
            } catch (Exception e) {
                log.error("removeObjects", e);
            }
        }
        return false;
    }

}

7、测试

package com.qbb.minio.controller;

import com.qbb.minio.config.MinioConfig;
import com.qbb.minio.util.MinioUtil;
import io.minio.messages.Bucket;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletResponse;
import java.util.List;

/**
 * @author QiuQiu&LL (个人博客:https://www.cnblogs.com/qbbit)
 * @version 1.0
 * @date 2022-09-19  15:45
 * @Description:
 */
@Slf4j
@Api(tags = "MinIO")
@RestController
@RequestMapping("/minio")
public class FileUploadController {

    @Resource
    MinioConfig minioConfig;

    @Resource
    MinioUtil minioUtil;

    @ApiOperation("测试程序")
    @GetMapping("/hello")
    public String hello() {
        return "hello";
    }

    @ApiOperation("文件上传")
    @PostMapping("/upload")
    public String upload(@ApiParam("文件") MultipartFile file) {
        try {
            /**
             * 这里应该放在service层处理的,将上传的文件路径存入数据库,我就不这么麻烦了,直接返回给前端
             */
            String bucket = minioConfig.getBucket();
            String endpoint = minioConfig.getEndpoint();

            // 1.检查存储桶是否已经存在
            boolean isExist = minioUtil.bucketExists(bucket);
            if (isExist) {
                log.info("Bucket already exists");
            } else {
                // 不存在则创建一个名为bucket的存储桶，用于存储照片的zip文件。
                minioUtil.makeBucket(bucket);
            }
            // 2.上传
            String objectName = minioUtil.upload(file);
            // 3.访问路径
            return endpoint + "/" + bucket + "/" + objectName;
        } catch (Exception e) {
            e.printStackTrace();
            throw new RuntimeException("文件上传异常！！！");
        }
    }

    @ApiOperation("文件下载")
    @GetMapping("/download")
    public void download(@RequestParam("fileName") String fileName, HttpServletResponse response) {
        minioUtil.download(fileName, response);
    }

    @ApiOperation("文件删除")
    @DeleteMapping("/remove")
    public String remove(@RequestParam("fileName") String fileName) {
        boolean flag = minioUtil.remove(fileName);
        if (flag) {
            return "success";
        }
        return "error";
    }

    @ApiOperation("文件预览")
    @GetMapping("/preview")
    public String preview(@RequestParam("fileName") String fileName) {
        String url = minioUtil.preview(fileName);
        if (!StringUtils.isEmpty(url)) {
            return url;
        }
        return "error";
    }

    @ApiOperation("获取Bucket列表")
    @GetMapping("/getAllBuckets")
    public List<Bucket> getAllBuckets() {
        return minioUtil.getAllBuckets();
    }

    @ApiOperation("创建一个Bucket")
    @PostMapping("/makeBucket/{bucketName}")
    public String makeBucket(@PathVariable("bucketName") String bucketName) {
        minioUtil.makeBucket(bucketName);
        return "success";
    }

    @ApiOperation("删除一个Bucket")
    @DeleteMapping("/removeBucket/{bucketName}")
    public String removeBucket(@PathVariable("bucketName") String bucketName) {
        Boolean isSuccess = minioUtil.removeBucket(bucketName);
        if (isSuccess) {
            return "success";
        }
        return "error";
    }

    @ApiOperation("查看Bucket中的所有Object")
    @GetMapping("/getBucketObjectName/{bucketName}")
    public List<String> getBucketObjectName(@PathVariable("bucketName") String bucketName) {
        return minioUtil.getBucketObjectName(bucketName);
    }
}