对象存储MinIO（实现文件上传、读取、下载、删除）

一、 MiNIO

        Minio 是一个基于Apache License v2.0开源协议的对象存储服务。它兼容亚马逊S3云存储服

务接口，非常适合于存储大容量非结构化的数据，例如图片、视频、日志文件、备份数据和容器/

虚拟机镜像等，而一个对象文件可以是任意大小，从几kb到最大5T不等。

        MinIO是一个非常轻量的服务,可以很简单的和其他应用的结合，类似 nodejs, Redis 或者

Mysql。

二、 MinIO安装和启动

       由于MinIO是一个单独的服务器，需要单独部署，有关MinIO在windows系统上的使用请查看

以下博客。

window10安装minio_angelasp的博客-CSDN博客_win10 安装minio

三、 pom.xml（Maven依赖文件）

       org.springframework.boot       spring-boot-starter-WEB       io.minio       minio       8.3.4

 四、 applicatin.properties（配置文件）

# 设置单个文件大小spring.servlet.multipart.max-file-size= 50MB#minio文件服务器配置s3.url=Http://localhost:9000s3.accessKey=admins3.secreTKEy=admin123s3.bucketName=test

五、 编写Java业务类

minio涉及到的方法有：判断存储桶是否存在，创建存储桶，上传文件，读取文件、下载文件，删

除文件等操作

StorageProperty 存储属性类：

import lombok.Data;import org.springframework.boot.context.properties.ConfigurationProperties;import org.springframework.stereotype.Component;  @Data@Component@ConfigurationProperties(prefix = "s3")public class StorageProperty {    private String url;    private String accessKey;    private String secretKey;//    private long callTimeOut = 60000;//    private long readTimeOut = 300000;}

minio配置类： 

import io.minio.BucketExistsArgs;import io.minio.Minioclient;import io.minio.messages.Bucket;import lombok.SneakyThrows;import lombok.extern.slf4j.Slf4j;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.context.annotation.Configuration;import org.springframework.stereotype.Component; import javax.annotation.PostConstruct;import java.util.List; @Slf4j@Component@Configurationpublic class MinioClientConfig {     @Autowired    private StorageProperty storageProperty;     private static MinioClient minioClient;          public static MinioClient getMinioClient(){        return minioClient;    }         @SneakyThrows(Exception.class)    public static boolean bucketExists(String bucketName) {        return minioClient.bucketExists(BucketExistsArgs.builder().bucket(bucketName).build());    }          @SneakyThrows(Exception.class)    public static List getAllBuckets() {        return minioClient.listBuckets();    }         @PostConstruct    public void init() {        try {            minioClient = MinioClient.builder()                    .endpoint(storageProperty.getUrl())                    .credentials(storageProperty.getAccessKey(), storageProperty.getSecretKey())                    .build();        } catch (Exception e) {            e.printStackTrace();            log.error("初始化minio配置异常: 【{}】", e.fillInStackTrace());        }    } }

minio工具类 

import io.minio.*; import lombok.extern.slf4j.Slf4j;import org.springframework.stereotype.Component;import org.springframework.web.multipart.MultipartFile; import javax.servlet.ServletOutputStream;import javax.servlet.http.httpservletResponse;import java.io.InputStream;import java.nio.charset.StandardCharsets;import java.util.Map; @Slf4j@Componentpublic class MinioUtil {            public ResultEntity> minioUpload(MultipartFile file, String fileName, String bucketName) {        ResultEntity> resultEntity = new ResultEntity();        try {            MinioClient minioClient = MinioClientConfig.getMinioClient();            // fileName为空，说明要使用源文件名上传            if (fileName == null) {                fileName = file.getOriginalFilename();                fileName = fileName.replaceAll(" ", "_");            }            InputStream inputStream = file.getInputStream();            PutObjectArgs objectArgs = PutObjectArgs.builder().bucket(bucketName).object(fileName)                    .stream(inputStream, file.getSize(), -1).contentType(file.getContentType()).build();            //文件名称相同会覆盖            minioClient.putObject(objectArgs);            return resultEntity;        } catch (Exception e) {            e.printStackTrace();            return null;        }    }          public boolean bucketExists(String bucketName) {        boolean flag = false;        try {            flag = MinioClientConfig.bucketExists(bucketName);            if (flag) {                return true;            }        } catch (Exception e) {            e.printStackTrace();            return false;        }        return false;    }         public InputStream getFileInputStream(String fileName, String bucketName) {        try {            MinioClient minioClient = MinioClientConfig.getMinioClient();            return minioClient.getObject(GetObjectArgs.builder().bucket(bucketName).object(fileName).build());        } catch (Exception e) {            e.printStackTrace();            log.error(e.getMessage());        }        return null;    }          public void createBucketName(String bucketName) {        try {            if (StringUtils.isBlank(bucketName)) {                return;            }            MinioClient minioClient = MinioClientConfig.getMinioClient();            boolean isExist = MinioClientConfig.bucketExists(bucketName);            if (isExist) {                log.info("Bucket {} already exists.", bucketName);            } else {                minioClient.makeBucket(MakeBucketArgs.builder().bucket(bucketName).build());            }        } catch (Exception e) {            e.printStackTrace();            log.error(e.getMessage());        }    }        public InputStream downloadFile(String bucketName, String originalName, HttpServletResponse response) {        try {            MinioClient minioClient = MinioClientConfig.getMinioClient();            InputStream file = minioClient.getObject(GetObjectArgs.builder().bucket(bucketName).object(originalName).build());            String filename = new String(originalName.getBytes("ISO8859-1"), StandardCharsets.UTF_8);            if (StringUtils.isNotBlank(originalName)) {                filename = originalName;            }            response.setHeader("Content-Disposition", "attachment;filename=" + filename);            ServletOutputStream servletOutputStream = response.getOutputStream();            int len;            byte[] buffer = new byte[1024];            while ((len = file.read(buffer)) > 0) {                servletOutputStream.write(buffer, 0, len);            }            servletOutputStream.flush();            file.close();            servletOutputStream.close();            return file;        } catch (Exception e) {            e.printStackTrace();            return null;        }    }         public void deleteBucketName(String bucketName) {        try {            if (StringUtils.isBlank(bucketName)) {                return;            }            MinioClient minioClient = MinioClientConfig.getMinioClient();            boolean isExist = MinioClientConfig.bucketExists(bucketName);            if (isExist) {                minioClient.removeBucket(RemoveBucketArgs.builder().bucket(bucketName).build());            }        } catch (Exception e) {            e.printStackTrace();            log.error(e.getMessage());        }    }        public void deleteBucketFile(String bucketName) {        try {            if (StringUtils.isBlank(bucketName)) {                return;            }            MinioClient minioClient = MinioClientConfig.getMinioClient();            boolean isExist = minioClient.bucketExists(BucketExistsArgs.builder().bucket(bucketName).build());            if (isExist) {                minioClient.deleteBucketEncryption(DeleteBucketEncryptionArgs.builder().bucket(bucketName).build());            }        } catch (Exception e) {            e.printStackTrace();            log.error(e.getMessage());        }    }         public String getPreviewFileUrl(String bucketName, String fileName) {        try {            MinioClient minioClient = MinioClientConfig.getMinioClient();            return minioClient.getPresignedObjectUrl(GetPresignedObjectUrlArgs.builder().bucket(bucketName).object(fileName).build());        } catch (Exception e) {            e.printStackTrace();            return "";        }    }}

 六、 MinIoController

文件上传、文件读取、文件下载、文件删除接口如下：

@RestController@RequestMapping("/minio")public class MinIoController extends BaseController {     MinioUtil minioUtil = new MinioUtil();         @PostMapping("/uploadFile")    public ajaxResult uploadFile(@RequestBody MultipartFile file) {        MinioClient minioClient = MinioClientConfig.getMinioClient();        if (minioClient == null) {            return AjaxResult.error("连接MinIO服务器失败", null);        }        ResultEntity> result = minioUtil.minioUpload(file, "", "data-enpower");        if (result.getCode() == 0) {            return AjaxResult.success("上传成功");        } else {            return AjaxResult.error("上传错误！！！");        }    }         @RequestMapping("/getRedFile")    public AjaxResult getRedFile(@RequestBody String fileName) {        MinioClient minioClient = MinioClientConfig.getMinioClient();        if (minioClient == null) {            return AjaxResult.error("连接MinIO服务器失败", null);        }        String url = minioUtil.getPreviewFileUrl("data-enpower",fileName);        return AjaxResult.success(url);    }         @RequestMapping("/downloadFile")    public String downloadFile(@RequestParam String fileName, HttpServletResponse response) {        MinioClient minioClient = MinioClientConfig.getMinioClient();        if (minioClient == null) {            return "连接MinIO服务器失败";        }        return minioUtil.downloadFile("data-enpower",fileName,response) != null ? "下载成功" : "下载失败";    }         @PostMapping("/deleteFile")    public String deleteFile(String fileName) {        MinioClient minioClient = MinioClientConfig.getMinioClient();        if (minioClient == null) {            return "连接MinIO服务器失败";        }        boolean flag = minioUtil.deleteFile("data-enpower",fileName);        return flag == true ? "删除成功" : "删除失败";    }  }

对象存储MinIO基本用法

对象存储服务MinIO的基本用法 

https://www.cnblogs.com/hackyle/p/minio-demo.html

来源地址：https://blog.csdn.net/ZHOU_VIP/article/details/129195318