SpringBoot整合Minio的详细步骤

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minio 是对象存储服务。它基于 Apache License 开源协议，兼容 Amazon S3 云存储接口。适合存储非结构化数据，如图片，音频，视频，日志等。对象文件最大可以达到 5TB。

优点有高性能，可扩展，操作简单，有图形化操作界面，读写性能优异等。官网

minio 部署可参考这篇：Minio 详细安装部署步骤

SpringBoot 快速整合 minio

1、添加 Maven 依赖

在 pom.xml 文件中添加MinIO客户端依赖项

    io.minio
    minio
    8.2.2









    com.alibaba
    fastjson
    1.2.78

2、配置MinIO连接信息

在 application.properties 或 application.yml 文件中配置MinIO的连接信息，包括服务器地址、端口、凭据等信息

# Minio 配置
minio.endpoint=127.0.0.1:9000 #对象存储服务的URL
minio.accessKey=admin #Access key账户 写账号也可以
minio.secretKey=admin #Secret key密码
minio.bucketName=test # 桶名称
# 过期时间
minio.expire=7200

# Minio 配置
minio:
  endpoint:  127.0.0.1:9000 #对象存储服务的URL
  accessKey: admin #Access key账户 写账号也可以
  secretKey: admin #Secret key密码
  bucketName: test # 桶名称
  expire: 7200 # 过期时间

3、创建 MinIO 客户端 Bean

在 SpringBoot 应用的配置类中创建一个 MinIO客户端的 Bean，以便在应用中使用 MinIO 服务

import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
/**
 * minio 配置属性
 */
@Data
@Component
@ConfigurationProperties(prefix = "minio")
public class MinioProperties {
    /**
     * Minio 连接地址
     */
    private String endpoint;
    /**
     * accessKey 或 账号
     */
    private String accessKey;
    /**
     * secretKey 或 密码
     */
    private String secretKey;
    /**
     * 桶名称
     */
    private String bucketName;
    /**
     * 默认是秒 地址过期时间，设置默认值7200秒
     */
    private int expire = 7200;
}

4、异常枚举类

/**
 * 异常枚举类
 */
public enum ExceptionEnums {
    FILE_NAME_NOT_NULL("0001", "文件名不能为空"),
    BUCKET_NAME_NOT_NULL("0002", "桶名称不能为空"),
    FILE_NOT_EXIST("0003", "文件不存在"),
    BUCKET_NOT_EXIST("0004", "桶不存在"),
    BUCKET_NAME_NOT_EXIST("0005", "桶不存在，需要先创建桶在创建文件夹");//枚举类如果写方法的话，此处需要写分号
    private String code;
    private String msg;
    ExceptionEnums(String ecode, String emsg) {
        this.code = ecode;
        this.msg = emsg;
    }
    public String getCode() {
        return code;
    }
    public String getMsg() {
        return msg;
    }
    public static ExceptionEnums statOf(String code) {
        for (ExceptionEnums state : values())
            if (state.getCode().equals(code))
                return state;
        return null;
    }
}

5、全局异常

import org.springframework.http.HttpStatus;
/**
 * 异常
 */
public class GeneralException extends RuntimeException {
    private Integer errorCode;
    public GeneralException() {
    }
    public GeneralException(Throwable throwable) {
        super(throwable);
    }
    public GeneralException(String msg) {
        super(msg);
        this.errorCode = HttpStatus.INTERNAL_SERVER_ERROR.value();
    }
    public GeneralException(Integer errorCode, String msg) {
        super(msg);
        this.errorCode = errorCode;
    }
    public Integer getErrorCode() {
        return this.errorCode;
    }
    public void setErrorCode(Integer errorCode) {
        this.errorCode = errorCode;
    }
}

6、minio 工具类

工具类包含创建 bucket，获取全部 bucket，获取 bucket 文件名和大小列表，文件上传，获取上传文件的完整路径，创建文件夹或目录，判断 bucket 是否存在，判断文件是否存在，文件下载，删除文件，批量删除文件方法

import com.alibaba.fastjson.JSON;
import io.minio.*;
import io.minio.errors.*;
import io.minio.http.Method;
import io.minio.messages.Bucket;
import io.minio.messages.DeleteError;
import io.minio.messages.DeleteObject;
import io.minio.messages.Item;
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.util.CollectionUtils;
import org.springframework.util.StringUtils;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletResponse;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URLEncoder;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.text.DecimalFormat;
import java.util.*;
/**
 * Minio 工具类
 */
@Component
@Slf4j
public class MinioUtils {
    @Autowired
    private MinioClient minioClient;
    @Autowired
    private MinioProperties minioProperties;
    /**
     * 初始化Bucket
     */
    private void createBucket(String bucketName) {
        try {
            // 判断 BucketName 是否存在
            if (bucketExists(bucketName)) {
                minioClient.makeBucket(MakeBucketArgs.builder().bucket(bucketName).build());
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    /**
     * 验证bucketName是否存在
     *
     * @return boolean true:存在
     */
    public boolean bucketExists(String bucketName) {
        if (StringUtils.isEmpty(bucketName)) {
            throw new GeneralException(ExceptionEnums.BUCKET_NAME_NOT_NULL.getMsg());
        }
        boolean flag = true;
        try {
            flag = minioClient.bucketExists(BucketExistsArgs.builder().bucket(bucketName).build());
        } catch (Exception e) {
            e.printStackTrace();
        }
        return flag;
    }
    /**
     * 获取全部bucket
     * 

     */
    public List getAllBuckets() {
        List list = null;
        try {
            final List buckets = minioClient.listBuckets();
            list = new ArrayList(buckets.size());
            for (Bucket bucket : buckets) {
                list.add(bucket.name());
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return list;
    }
    /**
     * 根据bucketName获取信息
     *
     * @param bucketName bucket名称
     * @return
     */
    public String getBucket(String bucketName) throws Exception {
        final Optional first = minioClient.listBuckets().stream().filter(b -> b.name().equals(bucketName)).findFirst();
        String name = null;
        if (first.isPresent()) {
            name = first.get().name();
        }
        return name;
    }
    /**
     * 获取桶中文件名和大小列表
     *
     * @param bucketName bucket名称
     * @param recursive  查询是否递归
     * @return
     */
    public List getFileList(String bucketName, boolean recursive) {
        if (StringUtils.isEmpty(bucketName)) {
            throw new GeneralException(ExceptionEnums.BUCKET_NAME_NOT_NULL.getMsg());
        }
        List items = new ArrayList();
        try {
            Iterable myObjects = minioClient.listObjects(ListObjectsArgs.builder().bucket(bucketName).prefix("/2022-08-03/4674a894-abaf-48cb-9ea9-40a4e8560af9/Desktop").recursive(recursive).build());
            Iterator iterator = myObjects.iterator();
            String format = "{'fileName':'%s','fileSize':'%s'}";
            for (Result myObject : myObjects) {
                System.out.println(myObject.get().objectName());
            }
            while (iterator.hasNext()) {
                Item item = iterator.next().get();
                items.add(JSON.parse(String.format(format, item.objectName(), formatFileSize(item.size()))));
//                items.add(JSON.parse(String.format(format, "/".concat("test").concat("/").concat(item.objectName()), formatFileSize(item.size()))));
            }
        } catch (Exception e) {
            e.printStackTrace();
            log.info(e.getMessage());
        }
        items.remove(0);
        return items;
    }
    /**
     * 文件上传
     *
     * @param file
     * @return
     */
    public Map uploadFile(String bucketName, MultipartFile[] file) {
        if (file == null || file.length == 0) {
            throw new GeneralException(ExceptionEnums.FILE_NAME_NOT_NULL.getMsg());
        }
        if (StringUtils.isEmpty(bucketName)) {
            throw new GeneralException(ExceptionEnums.BUCKET_NAME_NOT_NULL.getMsg());
        }
        List orgfileNameList = new ArrayList(file.length);
        for (MultipartFile multipartFile : file) {
            String orgfileName = multipartFile.getOriginalFilename();
            orgfileNameList.add(orgfileName);
            try {
                //文件上传
                InputStream in = multipartFile.getInputStream();
                minioClient.putObject(PutObjectArgs.builder().bucket(bucketName).object(orgfileName).stream(in, multipartFile.getSize(), -1).contentType(multipartFile.getContentType()).build());
                in.close();
            } catch (Exception e) {
                e.printStackTrace();
                log.error(e.getMessage());
            }
        }
        Map data = new HashMap();
        data.put("bucketName", bucketName);
        data.put("fileName", orgfileNameList);
        return data;
    }
    /**
     * 获取上传文件的完整路径
     *
     * @param bucketName 桶名称
     * @param fileName   文件名
     * @param expire     地址过期时间
     * @return
     */
    public String getPresignedObjectUrl(String bucketName, String fileName, Integer expire) {
        if (StringUtils.isEmpty(bucketName)) {
            throw new GeneralException(ExceptionEnums.BUCKET_NAME_NOT_NULL.getMsg());
        }
        if (StringUtils.isEmpty(fileName)) {
            throw new GeneralException(ExceptionEnums.FILE_NAME_NOT_NULL.getMsg());
        }
        expire = Objects.isNull(expire) ? minioProperties.getExpire() : expire;
        // 验证桶是否存在在
        final boolean validationBucket = bucketExists(bucketName);
        if (!validationBucket) {
            throw new GeneralException(ExceptionEnums.BUCKET_NOT_EXIST.getMsg());
        }
        // 验证文件是否存在
        final boolean validationFileName = doFileNameExist(bucketName, fileName);
        if (!validationFileName) {
            throw new GeneralException(ExceptionEnums.FILE_NOT_EXIST.getMsg());
        }
        String url = null;
        try {
            // 获取桶和文件的完整路径
            url = minioClient.getPresignedObjectUrl(GetPresignedObjectUrlArgs.builder().bucket(bucketName).object(fileName).method(Method.GET).expiry(expire).build());
        } catch (MinioException e) {
            log.error("Error occurred: " + e);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return url;
    }
    /**
     * 创建文件夹或目录
     *
     * @param bucketName 存储桶
     * @param objectName 目录路径
     */
    public Map putDirObject(String bucketName, String objectName) throws IOException, InvalidKeyException, InvalidResponseException, InsufficientDataException, NoSuchAlgorithmException, ServerException, InternalException, XmlParserException, ErrorResponseException {
        // 判断桶是否存在
        if (!bucketExists(bucketName)) {
            throw new GeneralException(ExceptionEnums.BUCKET_NAME_NOT_EXIST.getMsg());
        }
        final ObjectWriteResponse response = minioClient.putObject(
                PutObjectArgs.builder().bucket(bucketName).object(objectName).stream(
                        new ByteArrayInputStream(new byte[]{}), 0, -1)
                        .build());
        Map map = new HashMap();
        map.put("etag", response.etag());
        map.put("versionId", response.versionId());
        return map;
    }
    /**
     * 判断桶是否存在
     *
     * @param bucketName 存储桶
     * @param objectName 文件夹名称（去掉/）
     * @return true：存在
     */
    public boolean doFolderExist(String bucketName, String objectName) {
        boolean exist = false;
        try {
            Iterable results = minioClient.listObjects(
                    ListObjectsArgs.builder().bucket(bucketName).prefix(objectName).recursive(false).build());
            for (Result result : results) {
                Item item = result.get();
                if (item.isDir()) {
                    exist = true;
                }
            }
        } catch (Exception e) {
            exist = false;
        }
        return exist;
    }
    /**
     * 判断文件是否存在
     *
     * @param fileName 对象
     * @return true：存在
     */
    public boolean doFileNameExist(String bucketName, String fileName) {
        if (StringUtils.isEmpty(bucketName)) {
            throw new GeneralException(ExceptionEnums.BUCKET_NAME_NOT_NULL.getMsg());
        }
        if (StringUtils.isEmpty(fileName)) {
            throw new GeneralException(ExceptionEnums.FILE_NAME_NOT_NULL.getMsg());
        }
        boolean exist = true;
        try {
            minioClient.statObject(StatObjectArgs.builder().bucket(bucketName).object(fileName).build());
        } catch (Exception e) {
            exist = false;
        }
        return exist;
    }
    /**
     * 文件下载
     *
     * @param response
     * @param fileName
     */
    public void downloadFile(HttpServletResponse response, String bucketName, String fileName) {
        if (StringUtils.isEmpty(bucketName)) {
            throw new GeneralException(ExceptionEnums.BUCKET_NAME_NOT_NULL.getMsg());
        }
        if (StringUtils.isEmpty(fileName)) {
            throw new GeneralException(ExceptionEnums.FILE_NAME_NOT_NULL.getMsg());
        }
        // 判断文件是否存在
        final boolean flag = doFileNameExist(bucketName, fileName);
        if (!flag) {
            throw new GeneralException(ExceptionEnums.FILE_NOT_EXIST.getMsg());
        }
        InputStream in = null;
        try {
            // 获取对象信息
            StatObjectResponse stat = minioClient.statObject(StatObjectArgs.builder().bucket(bucketName).object(fileName).build());
            response.setContentType(stat.contentType());
            response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
            //文件下载
            in = minioClient.getObject(
                    GetObjectArgs.builder().bucket(bucketName).object(fileName).build());
            IOUtils.copy(in, response.getOutputStream());
        } catch (Exception e) {
            log.error(e.getMessage());
        } finally {
            if (in != null) {
                try {
                    in.close();
                } catch (IOException e) {
                    log.error(e.getMessage());
                }
            }
        }
    }
    /**
     * 删除文件
     *
     * @param bucketName bucket名称
     * @param fileName   文件名称
     *                   说明：当前方法不能真正删除，需要验证
     */
    public void deleteFile(String bucketName, String fileName) {
        if (StringUtils.isEmpty(bucketName)) {
            throw new GeneralException(ExceptionEnums.BUCKET_NAME_NOT_NULL.getMsg());
        }
        if (StringUtils.isEmpty(fileName)) {
            throw new GeneralException(ExceptionEnums.FILE_NAME_NOT_NULL.getMsg());
        }
        try {
            minioClient.removeObject(RemoveObjectArgs.builder().bucket(bucketName).object(fileName).build());
        } catch (Exception e) {
            log.error(e.getMessage());
            e.printStackTrace();
        }
    }
    /**
     * 批量文件删除
     *
     * @param bucketName bucket名称
     * @param fileNames  文件名
     */
    public void deleteBatchFile(String bucketName, List fileNames) {
        if (StringUtils.isEmpty(bucketName)) {
            throw new GeneralException(ExceptionEnums.BUCKET_NAME_NOT_NULL.getMsg());
        }
        if (CollectionUtils.isEmpty(fileNames)) {
            throw new GeneralException(ExceptionEnums.FILE_NAME_NOT_NULL.getMsg());
        }
        try {
            List objects = new LinkedList();
            for (String fileName : fileNames) {
                objects.add(new DeleteObject(fileName));
            }
            Iterable results =
                    minioClient.removeObjects(
                            RemoveObjectsArgs.builder().bucket(bucketName).objects(objects).build());
            for (Result result : results) {
                DeleteError error = result.get();
                log.error("Error occurred: " + error);
            }
        } catch (Exception e) {
            e.printStackTrace();
            log.error("批量删除失败！error:{}", e);
        }
    }
    /**
     * 文件大小
     *
     * @param fileS
     * @return
     */
    private static String formatFileSize(long fileS) {
        DecimalFormat df = new DecimalFormat("#.00");
        String fileSizeString = "";
        String wrongSize = "0B";
        if (fileS == 0) {
            return wrongSize;
        }
        if (fileS  
7、文件调用接口
 
上传文件，获取上传文件完整路径，文件下载，文件删除，批量删除
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletResponse;
import java.util.List;
import java.util.Map;
@RestController
public class MinioController {
    @Autowired
    private MinioUtils minioUtils;
    /**
     * 获取桶中文件名和大小列表
     *
     * @return
     */
    @GetMapping("/getFileList")
    public List getFileList() {
        return minioUtils.getFileList("test", true);
    }
    /**
     * 判断文件是否存在
     *
     * @param bucketName
     * @param fileName
     * @return
     */
    @GetMapping("/doFileNameExist")
    public boolean doFileNameExist(String bucketName, String fileName) {
        return minioUtils.doFolderExist(bucketName, fileName);
    }
    /**
     * 上传文件
     *
     * @param file
     * @return
     */
    @PostMapping("/uploadFiles")
    public Map uploadFiles(String bucketName, @RequestParam(name = "file", required = false) MultipartFile[] file) {
        if (file == null || file.length == 0) {
            throw new GeneralException(ExceptionEnums.FILE_NAME_NOT_NULL.getMsg());
        }
        if (StringUtils.isEmpty(bucketName)) {
            throw new GeneralException(ExceptionEnums.BUCKET_NAME_NOT_NULL.getMsg());
        }
        return minioUtils.uploadFile(bucketName, file);
    }
    /**
     * 获取上传文件的完整浏览路径
     *
     * @param filename
     * @return
     */
    @GetMapping("/getPresignedObjectUrl")
    public String getPresignedObjectUrl(@RequestParam(name = "filename") String filename) {
        return minioUtils.getPresignedObjectUrl("test", filename, null);
    }
    /**
     * 文件下载
     *
     * @param response
     * @param fileName
     */
    @GetMapping("/downloadFile")
    public void downloadFile(HttpServletResponse response, @RequestParam("fileName") String fileName) {
        minioUtils.downloadFile(response, "test", fileName);
    }
    /**
     * 删除单个文件
     *
     * @param fileName 完整路径（不包含bucket）
     */
    @DeleteMapping("/deleteFile")
    public void deleteFile(String bucketName, String fileName) {
        minioUtils.deleteFile(bucketName, fileName);
    }
    /**
     * 批量删除文件
     *
     * @param fileNames 完整路径（不包含bucket）
     */
    @DeleteMapping("/deleteBatchFile")
    public void deleteBatchFile(String bucketName, @RequestParam("fileNames") List fileNames) {
        minioUtils.deleteBatchFile(bucketName, fileNames);
    }
}