基于gradle的springboot整合minio并实现代码在minio创建文件夹存放文件

在项目中引入依赖，图片路径如下：
代码：

	//Minio对象存储
    implementation libraries['minio-api']

声明该依赖的版本号，如下：

代码：

 		//对象存储
        "minio-api"                        : "io.minio:minio:8.2.1"

注意： 在使用minio时不需要引入spring-boot-starter-minio依赖。

application.yml配置如下：

spring:
  #图片服务器
  minio:
    access-key: 用户名
    secret-key: 密码
    url: http://ip:9000
    bucket: 存储桶

minio配置类：

@Configuration
public class MinIoClientConfig {

    @Value("${spring.minio.url}")
    private String endpoint;
    @Value("${spring.minio.access-key}")
    private String accessKey;
    @Value("${spring.minio.secret-key}")
    private String secretKey;

    
    @Bean
    public MinioClient minioClient(){

        return MinioClient.builder()
                .endpoint(endpoint)
                .credentials(accessKey, secretKey)
                .build();
    }
}

@Slf4j
@Service
public class OcrMinioService {
    @Autowired
    private MinioClient minioClient;

    @Value("${spring.minio.bucket}")
    private String bucketName;


    
    public void existBucket(String name) {
        try {
            boolean exists = minioClient.bucketExists(BucketExistsArgs.builder().bucket(name).build());
            if (!exists) {
                minioClient.makeBucket(MakeBucketArgs.builder().bucket(name).build());
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    
    public Boolean makeBucket(String bucketName) {
        try {
            minioClient.makeBucket(MakeBucketArgs.builder()
                    .bucket(bucketName)
                    .build());
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
        return true;
    }

    
    public Boolean removeBucket(String bucketName) {
        try {
            minioClient.removeBucket(RemoveBucketArgs.builder()
                    .bucket(bucketName)
                    .build());
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
        return true;
    }




    //上传文件
    public List upload(MultipartFile[] multipartFile) {
        List names = new ArrayList<>(multipartFile.length);
        for (MultipartFile file : multipartFile) {
            String fileName = file.getOriginalFilename();
            String[] split = fileName.split("\.");
            if (split.length > 1) {
                fileName = split[0] + "_" + System.currentTimeMillis() + "." + split[1];
            } else {
                fileName = fileName + System.currentTimeMillis();
            }
            InputStream in = null;
            try {
                in = file.getInputStream();
                minioClient.putObject(PutObjectArgs.builder()
                        .bucket(bucketName)
                        .object(fileName)
                        .stream(in, in.available(), -1)
                        .contentType(file.getContentType())
                        .build()
                );
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                if (in != null) {
                    try {
                        in.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }
            names.add(fileName);
        }
        return names;
    }

    
    @SneakyThrows
    public List getAllBuckets(){
        return minioClient.listBuckets();
    }

    
    @SneakyThrows
    public Optional getBucket(String bucketName){
        return minioClient.listBuckets().stream().filter(b -> b.name().equals(bucketName)).findFirst();
    }




    
    @SneakyThrows  //抛出异常
    public void putObject(String bucketName, String objectName, InputStream stream){
        PutObjectArgs putObjectArgs = PutObjectArgs.builder()
                .bucket(bucketName)
                .object(objectName)
                .stream(stream, -1, 10485760)
                .build();
        minioClient.putObject(putObjectArgs);
        if (stream != null){
            stream.close();
        }
    }

     
    @SneakyThrows
    public void putObject(String bucketName, String objectName, InputStream stream, long size, String contentType){
        PutObjectArgs putObjectArgs = PutObjectArgs.builder()
                .bucket(bucketName)
                .object(objectName)
                .stream(stream, size, -1)
                .contentType(contentType)
                .build();
        minioClient.putObject(putObjectArgs);
    }

    
    @SneakyThrows
    public String getPresignedObjectUrl(String bucketName, String objectName, Integer expires){
        GetPresignedObjectUrlArgs build = GetPresignedObjectUrlArgs.builder()
                .method(Method.GET) //这个不能少
                .bucket(bucketName)
                .object(objectName)
                .expiry(expires)
                .build();

        return minioClient.getPresignedObjectUrl(build);
    }

    
    @SneakyThrows
    public String getPresignedObjectUrl(String bucketName, String objectName){
        GetPresignedObjectUrlArgs build = GetPresignedObjectUrlArgs.builder()
                .method(Method.GET)
                .bucket(bucketName)
                .object(objectName)
                .build();
        return minioClient.getPresignedObjectUrl(build);
    }

    
    @SneakyThrows
    public InputStream getObject(String bucketName, String objectName){
        return minioClient.getObject(GetObjectArgs.builder().bucket(bucketName).object(objectName).build());
    }

    
    @SneakyThrows
    public StatObjectResponse getObjectInfo(String bucketName, String objectName){
        return minioClient.statObject(StatObjectArgs.builder().bucket(bucketName).object(objectName).build());
    }

     
    @SneakyThrows
    public void remove(String bucketName, String objectName){
        minioClient.removeObject(RemoveObjectArgs.builder().bucket(bucketName).object(objectName).build());
    }


    
    public ResponseEntity download(String fileName) {
        ResponseEntity responseEntity = null;
        InputStream in = null;
        ByteArrayOutputStream out = null;
        try {
            in = minioClient.getObject(GetObjectArgs.builder().bucket(bucketName).object(fileName).build());
            out = new ByteArrayOutputStream();
            IOUtils.copy(in, out);
            //封装返回值
            byte[] bytes = out.toByteArray();
            HttpHeaders headers = new HttpHeaders();
            try {
                headers.add("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }
            headers.setContentLength(bytes.length);
            headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
            headers.setAccessControlExposeHeaders(Arrays.asList("*"));
            responseEntity = new ResponseEntity(bytes, headers, HttpStatus.OK);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (in != null) {
                    try {
                        in.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
                if (out != null) {
                    out.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return responseEntity;
    }

    
    public List listObjects(String bucketName) {
        Iterable> results = minioClient.listObjects(
                ListObjectsArgs.builder().bucket(bucketName).build());
        List objectItems = new ArrayList<>();
        try {
            for (Result result : results) {
                Item item = result.get();
                MinioItem objectItem = new MinioItem();
                objectItem.setObjectName(item.objectName());
                objectItem.setSize(String.valueOf(item.size()));
                objectItems.add(objectItem);
            }
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
        return objectItems;
    }

    
    public Iterable> removeObjects(String bucketName, List objects) {
        List dos = objects.stream().map(e -> new DeleteObject(e)).collect(Collectors.toList());
        Iterable> results = minioClient.removeObjects(RemoveObjectsArgs.builder().bucket(bucketName).objects(dos).build());
        return results;
    }

}

例如：

上传后的图片如下：