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）

<!-- SpringBoot Web容器 -->
<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency><groupId>io.minio</groupId><artifactId>minio</artifactId><version>8.3.4</version>
</dependency>

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:9000
s3.accessKey=admin
s3.secretKey=admin123
s3.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

1、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;
}

2、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
@Configuration
public class MinioClientConfig {@Autowiredprivate StorageProperty storageProperty;private static MinioClient minioClient;/*** @description: 获取minioClient* @date 2021/6/22 16:55* @return io.minio.MinioClient*/public static MinioClient getMinioClient(){return minioClient;}/*** 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(BucketExistsArgs.builder().bucket(bucketName).build());}/*** 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();}/*** 初始化minio配置** @param :* @return: void* @date : 2020/8/16 20:56*/@PostConstructpublic 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());}}}

3、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
@Component
public class MinioUtil {/*** Minio文件上传** @param file       文件实体* @param fileName   修饰过的文件名 非源文件名* @param bucketName 所存文件夹（桶名）* @return*/public ResultEntity<Map<String, Object>> minioUpload(MultipartFile file, String fileName, String bucketName) {ResultEntity<Map<String, Object>> 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;}}/*** 检查存储桶是否存在** @param bucketName 存储桶名称* @return*/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;}/*** 获取文件流** @param fileName   文件名* @param bucketName 桶名（文件夹）* @return*/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;}/*** @param bucketName:* @author* @description: 创建桶* @date 2022/8/16 14:36*/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());}}/*** 下载文件** @param originalName 文件路径*/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;}}/*** @param bucketName:* @description: 删除桶* @date 2022/8/16 14:36*/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());}}/*** @param bucketName:* @description: 删除桶下面所有文件* @date 2022/8/16 14:36*/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());}}/*** 根据文件路径得到预览文件绝对地址** @param bucketName* @param fileName* @return*/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();/*** 上传文件* @param file* @return*/@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<Map<String, Object>> 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！！！");}}/*** 获取文件预览地址* @param fileName* @return*/@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);}/*** 下载文件* @param fileName* @param response* @return*/@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";}/*** 删除文件** @param fileName 文件路径* @return*/@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