minio + linux + docker + spring boot实现文件上传与下载

1.在linux上安装并启动docker

• 检查linux内核，必须是3.10以上

uname ‐r

• 安装docker

yum install docker

• 启动docker

systemctl start docker

2.在docker中拉取minio并启动

• 搜索镜像

docker search minio

• 拉取镜像

docker pull minio/minio

• 启动minio

docker run  -p 9000:9000 -p 9090:9090 --name minio \-d --restart=always \-e MINIO_ACCESS_KEY=vinci \-e MINIO_SECRET_KEY=123456\-v /usr/local/minio/data:/data \-v /usr/local/minio/config:/root/.minio \minio/minio server /data  --console-address ":9000" --address ":9090"

-p: 指定端口映射，格式为：主机端口:容器端口 (这里注意要映射两个，否则API会访问不到)
-e “MINIO_ROOT_USER=vinci” minio用户名；
-e MINIO_SECRET_KEY=123456 minio 密码
-d: 后台运行容器，并返回容器ID；
-v: 绑定一个卷

这里可以看到minio已经在docker里启动起来了

接下来我们可以通过以下命令来查看 minio console和minio api 访问端口

docker logs minio

• 访问minio控制台
  在此步骤前记得开放端口号
  
  我们接下来可以使用密码和账号登录minio控制台了

3.Spring Boot 整合 minio

在此之前我们可以先通过控制台来创建一个bucket

• 集成minio

<dependency><groupId>io.minio</groupId><artifactId>minio</artifactId><version>8.4.0</version>
</dependency>

• 编写minio配置类

/*** @package: com.vinci.minio.config* @className: MinioConfig* @author: Vinci* @description: minio配置类* @date: 2023/10/27 13:10*/
@Data
@Configuration
@ConfigurationProperties(prefix = "minio")
public class MinioConfig {private String endpoint;private String accessKey;private String secretKey;private String bucketName;@Beanpublic MinioClient minioClient(){return MinioClient.builder().endpoint(endpoint).credentials(accessKey, secretKey).build();}}

• 在application.properties中添加以下配置

minio.endpoint=http://108.13.21.28:9090/ 
minio.bucket-name=images
minio.access-key=xxxxx
minio.secret-key=xxxxx

注意 minio.endpoint 是minio API地址，不是控制台地址
minio.bucket-name 是 bucket的名称
minio.access-key 是用户名
minio.secret-key是密码

• 编写minio工具类

package com.vinci.minio.utils;import com.vinci.minio.config.MinioConfig;
import io.minio.*;
import io.minio.http.Method;
import io.minio.messages.Bucket;
import io.minio.messages.Item;
import lombok.extern.slf4j.Slf4j;
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.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.UUID;/*** @description: minio工具类* @author: Vinci* @date: 2023/10/27 13:23**/
@Component
@Slf4j
public class MinioUtil {@Resourceprivate MinioConfig config;@Resourceprivate MinioClient minioClient;/*** @description: 查看存储bucket是否存在* @author: Vinci* @date: 2023/10/27 13:24* @param bucketName 要查看的bucket名称* @return 存在即返回true**/public Boolean bucketExists(String bucketName) {try {return minioClient.bucketExists(BucketExistsArgs.builder().bucket(bucketName).build());} catch (Exception e) {log.error("发现异常",e);return false;}}/*** @description: 创建存储bucket* @author: Vinci* @date: 2023/10/27 13:24* @param bucketName 要创建的bucket名称* @return 创建成功即返回true**/public Boolean makeBucket(String bucketName) {try {minioClient.makeBucket(MakeBucketArgs.builder().bucket(bucketName).build());return true;} catch (Exception e) {log.error("发现异常",e);return false;}}/*** @description: 删除存储bucket* @author: Vinci* @date: 2023/10/27 13:24* @param bucketName 要删除的bucket名称* @return 删除成功即返回true**/public Boolean removeBucket(String bucketName) {try {minioClient.removeBucket(RemoveBucketArgs.builder().bucket(bucketName).build());return true;} catch (Exception e) {log.error("发现异常",e);return false;}}/*** @description: 获取全部bucket* @author: Vinci* @date: 2023/10/27 13:24* @return 返回bucket结果集**/public List<Bucket> getAllBuckets() {try {return minioClient.listBuckets();} catch (Exception e) {log.error("发现异常",e);return null;}}/*** @description: 文件上传* @author: Vinci* @date: 2023/10/27 13:24* @param file 表单上传的文件* @return 返回文件上传的路径**/public String upload(MultipartFile file) {String originalFilename = file.getOriginalFilename();if (originalFilename == null || originalFilename.isEmpty()){throw new RuntimeException();}String fileName = UUID.randomUUID() + originalFilename.substring(originalFilename.lastIndexOf("."));String objectName = new SimpleDateFormat("yyyyMM").format(new Date()) + "/" + fileName;try {PutObjectArgs objectArgs = PutObjectArgs.builder().bucket(config.getBucketName()).object(objectName).stream(file.getInputStream(), file.getSize(), -1).contentType(file.getContentType()).build();minioClient.putObject(objectArgs);return objectName;} catch (Exception e) {log.error("发现异常",e);return null;}}/*** @description: 预览图片* @author: Vinci* @date: 2023/10/27 13:24* @param fileName 文件在bucket中的全路径* @return 返回文件的浏览路径**/public String preview(String fileName){// 查看文件地址GetPresignedObjectUrlArgs build = GetPresignedObjectUrlArgs.builder().bucket(config.getBucketName()).object(fileName).method(Method.GET).build();try {return minioClient.getPresignedObjectUrl(build);} catch (Exception e) {log.error("发现异常",e);return null;}}/*** @description: 文件下载* @author: Vinci* @date: 2023/10/27 13:24* @param fileName 文件在bucket中的全路径**/public void download(String fileName, HttpServletResponse res) {GetObjectArgs objectArgs = GetObjectArgs.builder().bucket(config.getBucketName()).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");res.setContentType("application/force-download");res.addHeader("Content-Disposition", "inline;fileName=" + fileName);try (ServletOutputStream stream = res.getOutputStream()){stream.write(bytes);stream.flush();}}} catch (Exception e) {log.error("发现异常",e);}}/*** @description: 查看文件对象* @author: Vinci* @date: 2023/10/27 13:24* @return 存储bucket内文件对象信息**/public List<Item> listObjects() {Iterable<Result<Item>> results = minioClient.listObjects(ListObjectsArgs.builder().bucket(config.getBucketName()).build());List<Item> items = new ArrayList<>();try {for (Result<Item> result : results) {items.add(result.get());}return items;} catch (Exception e) {log.error("发现异常",e);return null;}}/*** @description: 删除文件信息* @author: Vinci* @date: 2023/10/27 13:24* @return 删除成功则返回true**/public boolean remove(String fileName){try {minioClient.removeObject(RemoveObjectArgs.builder().bucket(config.getBucketName()).object(fileName).build());return true;}catch (Exception e){log.error("发现异常",e);return false;}}}

4.测试 minio 文件上传、下载及图片预览等功能

• 编写controller通过接口的方式来测试minio功能

package com.vinci.minio.controller;import com.vinci.minio.utils.MinioUtil;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;import javax.annotation.Resource;
import javax.servlet.http.HttpServletResponse;/*** @package: com.vinci.minio.controller* @className: TestMinioController* @author: Vinci* @description: 测试minio* @date: 2023/10/27 13:48*/
@Controller
@RequestMapping(value = "/minio")
public class TestMinioController {@Resourceprivate MinioUtil minioUtil;/*** @description: 文件上传测试* @author: Vinci* @date: 2023/10/27 13:48**/@ResponseBody@PostMapping("/upload")public String fileUpload(MultipartFile file) {return minioUtil.upload(file);}/*** @description: 文件下载测试* @author: Vinci* @date: 2023/10/27 13:51**/@ResponseBody@GetMapping("/download")public String fileDownload(String fileName, HttpServletResponse response){minioUtil.download(fileName,response);return "success";}/*** @description: 图片预览* @author: Vinci* @date: 2023/10/27 13:53**/@GetMapping("/preview")public String imagePreview(String fileName){return minioUtil.preview(fileName);}}

• 测试文件上传
  使用postMan来调用文件上传的接口
  
  我们返回控制台可以看到文件已经上传上去了
  
• 测试文件下载
  
  我们借助postman工具点击发送并下载可以看到文件下载成功了
  
  
• 图片在线预览
  
  我们同样借助postman工具发送请求，我们可以看到返回了图片的在线浏览地址，点击即可在线浏览图片
  
  以上便是minio 整合springboot的全部流程了，感谢阅读！
  SpringBoot案例地址：https://gitee.com/vinci99/springboot-minio-test.git