yml 配置
# ====================== ↓↓↓↓↓↓ MinIO文件服务器 ↓↓↓↓↓↓ ======================
minio:
  url: http://114.67.110.190:9001
  accessKey: minioadmin
  secretKey: minioadmin
  bucketName: zpf

maven:

  <dependency>
            <groupId>io.minio</groupId>
            <artifactId>minio</artifactId>
            <version>7.1.0</version>
  </dependency>

属性文件：

package com.example.minio;

import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;

@Data
@Configuration
@ConfigurationProperties(prefix = "minio")
public class MinIoProperties {

    /**
     * minio地址+端口号
     */
    private String url;

    /**
     * minio用户名
     */
    private String accessKey;

    /**
     * minio密码
     */
    private String secretKey;

    /**
     * 文件桶的名称
     */
    private String bucketName;

}

工具类：

package com.example.minio;

import io.minio.MinioClient;
import io.minio.ObjectStat;
import io.minio.PutObjectOptions;
import io.minio.messages.Bucket;
import lombok.SneakyThrows;
import lombok.extern.slf4j.Slf4j;
import org.apache.tomcat.util.http.fileupload.IOUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.multipart.MultipartFile;

import javax.annotation.PostConstruct;
import javax.servlet.http.HttpServletResponse;
import java.io.InputStream;
import java.net.URLEncoder;
import java.util.List;

@Slf4j
@Component
public class MinIoUtil {

    @Autowired
    MinIoProperties minIoProperties;

    private static MinioClient minioClient;

    /**
     * 初始化minio配置
     *
     * @param :
     * @return: void
     * @date : 2020/8/16 20:56
     */
    @PostConstruct
    public void init() {
        try {
            minioClient = new MinioClient(minIoProperties.getUrl(), minIoProperties.getAccessKey(),
                    minIoProperties.getSecretKey());
            createBucket(minIoProperties.getBucketName());
        } catch (Exception e) {
            e.printStackTrace();
            log.error("初始化minio配置异常: 【{}】", e.fillInStackTrace());
        }
    }

    /**
     * 判断 bucket是否存在
     *
     * @param bucketName:
     *            桶名
     * @return: boolean
     * @date : 2020/8/16 20:53
     */
    @SneakyThrows(Exception.class)
    public static boolean bucketExists(String bucketName) {
        return minioClient.bucketExists(bucketName);
    }

    /**
     * 创建 bucket
     *
     * @param bucketName:
     *            桶名
     * @return: void
     * @date : 2020/8/16 20:53
     */
    @SneakyThrows(Exception.class)
    public static void createBucket(String bucketName) {
        boolean isExist = minioClient.bucketExists(bucketName);
        if (!isExist) {
            minioClient.makeBucket(bucketName);
        }
    }

    /**
     * 获取全部bucket
     *
     * @param :
     * @return: java.util.List<io.minio.messages.Bucket>
     * @date : 2020/8/16 23:28
     */
    @SneakyThrows(Exception.class)
    public static List<Bucket> getAllBuckets() {
        return minioClient.listBuckets();
    }

    /**
     * 文件上传
     *
     * @param bucketName:
     *            桶名
     * @param fileName:
     *            文件名
     * @param filePath:
     *            文件路径
     * @return: void
     * @date : 2020/8/16 20:53
     */
    @SneakyThrows(Exception.class)
    public static void upload(String bucketName, String fileName, String filePath) {
        minioClient.putObject(bucketName, fileName, filePath, null);
    }

    /**
     * 文件上传
     *
     * @param bucketName:
     *            桶名
     * @param fileName:
     *            文件名
     * @param stream:
     *            文件流
     * @return: java.lang.String : 文件url地址
     * @date : 2020/8/16 23:40
     */
    @SneakyThrows(Exception.class)
    public static String upload(String bucketName, String fileName, InputStream stream) {
        minioClient.putObject(bucketName, fileName, stream, new PutObjectOptions(stream.available(), -1));
        return getFileUrl(bucketName, fileName);
    }

    /**
     * 文件上传
     *
     * @param bucketName:
     *            桶名
     * @param file:
     *            文件
     * @return: java.lang.String : 文件url地址
     * @date : 2020/8/16 23:40
     */
    @SneakyThrows(Exception.class)
    public static String upload(String bucketName, MultipartFile file) {
        final InputStream is = file.getInputStream();
        final String fileName = file.getOriginalFilename();
        minioClient.putObject(bucketName, fileName, is, new PutObjectOptions(is.available(), -1));
        is.close();
        return getFileUrl(bucketName, fileName);
    }

    /**
     * 删除文件
     *
     * @param bucketName:
     *            桶名
     * @param fileName:
     *            文件名
     * @return: void
     * @date : 2020/8/16 20:53
     */
    @SneakyThrows(Exception.class)
    public static void deleteFile(String bucketName, String fileName) {
        minioClient.removeObject(bucketName, fileName);
    }

    /**
     * 下载文件
     *
     * @param bucketName:
     *            桶名
     * @param fileName:
     *            文件名
     * @param response:
     * @return: void
     * @date : 2020/8/17 0:34
     */
    @SneakyThrows(Exception.class)
    public static void download(String bucketName, String fileName, HttpServletResponse response) {
        // 获取对象的元数据
        final ObjectStat stat = minioClient.statObject(bucketName, fileName);
        response.setContentType(stat.contentType());
        response.setCharacterEncoding("UTF-8");
        response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
        InputStream is = minioClient.getObject(bucketName, fileName);
        IOUtils.copy(is, response.getOutputStream());
        is.close();
    }

    /**
     * 获取minio文件的下载地址
     *
     * @param bucketName:
     *            桶名
     * @param fileName:
     *            文件名
     * @return: java.lang.String
     * @date : 2020/8/16 22:07
     */
    @SneakyThrows(Exception.class)
    public static String getFileUrl(String bucketName, String fileName) {
        return minioClient.presignedGetObject(bucketName, fileName);
    }

}