1、搭建单机MinIO

（1）配置 docker-compose.yml

minio:
image: minio/minio
container_name: "chain-minio"
ports:
- 9000:9000 # 服务端口
- 9090:9090 # 控制台端口
environment:
- "MINIO_ACCESS_KEY=admin" # 登陆账号
- "MINIO_SECRET_KEY=12345678" # 密码
volumes: # 挂载数据卷
- "/dockerdata/minio/data:/data"
- "/dockerdata/minio/config:/root/.minio"
command: server /data --console-address ":9090" # 容器启动时执行的指令
restart: always # 容器退出时总是重启容器

（2）执行docker-compose.yml

docker-compose up -d

（3）执行过后，在主机访问 控制台

服务器ip:9090

在控制台创建 Bucket。创建账户获取 Key 和 Secret

（4）运用 java sdk

pom.xml 添加依赖：

<!--     minio    -->
<dependency><groupId>io.minio</groupId><artifactId>minio</artifactId><version>8.4.2</version>
</dependency>

application.yml 添加配置：

# minio 配置
minio:url: http://192.168.182.135:9000 # 对象存储服务的URLaccessKey: admin # Access key 账户secretKey: 12345678  # Secret key 密码

这里的 accessKey 和 secretKey 可以是登录控制台的账户和密码，也可以是在控制台新增的账户
例如

# minio 配置
minio:url: http://192.168.182.135:9000  #对象存储服务的URLaccessKey: 5JT8GZMHP4P9CP3UIVOJ # Access key账户secretKey: ixElQtTEVnn2s+BgkAfE+0LmTDqlZMBrzH1HJ51o # Secret key 密码

添加 Config

@Configuration
public class MinioConfig {@Value("${minio.url}")private  String url;@Value("${minio.accessKey}")private String accessKey;@Value("${minio.secretKey}")private String secretKey;@Beanpublic MinioClient getMinioClient() {MinioClient minioClient = MinioClient.builder().endpoint(url).credentials(accessKey, secretKey).build();return minioClient;}
}

MinioUtil

@Component
public class MinioUtil {@Resourceprivate MinioClient minioClient;/* 创建一个桶*/public void createBucket(String bucket) throws Exception {boolean found = minioClient.bucketExists(BucketExistsArgs.builder().bucket(bucket).build());if (!found) {minioClient.makeBucket(MakeBucketArgs.builder().bucket(bucket).build());}}/* 上传一个文件*/public void uploadFile(InputStream stream, String bucket, String objectName) throws Exception {minioClient.putObject(PutObjectArgs.builder().bucket(bucket).object(objectName).stream(stream, -1, 10485760).build());}/* 列出所有的桶*/public List<String> listBuckets() throws Exception {List<Bucket> list = minioClient.listBuckets();List<String> names = new ArrayList<>();list.forEach(b -> {names.add(b.name());});return names;}/* 下载一个文件*/public InputStream download(String bucket, String objectName) throws Exception {InputStream stream = minioClient.getObject(GetObjectArgs.builder().bucket(bucket).object(objectName).build());return stream;}/* 删除一个桶*/public void deleteBucket(String bucket) throws Exception {minioClient.removeBucket(RemoveBucketArgs.builder().bucket(bucket).build());}/* 删除一个对象*/public void deleteObject(String bucket, String objectName) throws Exception {minioClient.removeObject(RemoveObjectArgs.builder().bucket(bucket).object(objectName).build());}
}

写个 Controller 测试

@Api(tags = "文件操作接口")
@RestController
public class MinioController{@ResourceMinioUtil minioUtil;@ApiOperation("上传一个文件")@RequestMapping(value = "/uploadfile", method = RequestMethod.POST)@ResponseBodypublic Response<Integer> fileupload(@RequestParam MultipartFile uploadfile, @RequestParam String bucket,@RequestParam(required=false) String objectName) throws Exception {minioUtil.createBucket(bucket);if (objectName != null) {minioUtil.uploadFile(uploadfile.getInputStream(), bucket, "/"+uploadfile.getOriginalFilename());} else {minioUtil.uploadFile(uploadfile.getInputStream(), bucket, uploadfile.getOriginalFilename());}return ResponseUtils.success(1);}@ApiOperation("下载一个文件")@RequestMapping(value = "/downloadFile", method = RequestMethod.GET)@ResponseBodypublic void downloadFile(@RequestParam String bucket, @RequestParam String objectName,HttpServletResponse response) throws Exception {InputStream stream = minioUtil.download(bucket, objectName);ServletOutputStream output = response.getOutputStream();response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(objectName.substring(objectName.lastIndexOf("/") + 1), "UTF-8"));response.setContentType("application/octet-stream");response.setCharacterEncoding("UTF-8");IOUtils.copy(stream, output);}
}