Minio8：基本使用

标签：基本 return String objectName bucket 使用 public Minio8 minio

minio高可用搭建

文档地址：Install and Deploy MinIO — MinIO Object Storage for Linux

准备多台minio服务器

我这里准备了两台

192.168.40.139 192.168.40.140

关闭防火墙

(或者开放minio需要的端口)

systemctl stop firewalld.service
systemctl disable firewalld.service

搭建负载均衡器

负载均衡器应使用“最少连接数”算法将请求路由到 MinIO 部署，因为部署中的任何 MinIO 节点都可以接收、路由或处理客户端请求。

官方推荐了两个：nginx 和 HaProxy

我这边使用nginx，搭建过程可参考：Nginx：安装 - 秋风飒飒吹 - 博客园 (cnblogs.com)

配置如下:（/etc/nginx/nginx.conf）

user  nginx;
worker_processes  auto;

error_log  /var/log/nginx/error.log notice;
pid        /var/run/nginx.pid;

events {
    worker_connections  1024;
}
http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;
    sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;
    upstream minioServer {
        least_conn;
        server 192.168.40.139:9000;
        server 192.168.40.140:9000;
    }

    server {
        listen       80;
        server_name  localhost;

        location ^~ /file/ {
                 proxy_buffering off;
                 proxy_pass http://minioServer/;
        }
    }
}

准备连续的域名

MinIO 需要使用扩展表示法 {x...y} 表示创建服务器池时连续的一系列 MinIO 主机。因此，MinIO 需要使用按顺序编号的主机名来表示部署中的每个 minio 服务器进程。

在开始此过程之前创建必要的 DNS 主机名映射。例如，以下主机名将支持 2 节点分布式部署：

• minio1.file.com
• minio2.file.com

您可以使用扩展表示法 minio{1...2}.example.com 指定整个主机名范围。

两台机器分别设置hostname：

hostnamectl set-hostname minio1.file.com
hostnamectl set-hostname minio2.file.com

cat >> /etc/hosts << EOF
192.168.40.139    minio1.file.com
192.168.40.140    minio2.file.com
EOF

存储说明

MinIO 强烈建议使用带有 XFS 格式磁盘的直连 JBOD 阵列，以获得最佳性能。

确保部署中的所有节点使用相同类型（NVMe、SSD 或 HDD）的驱动器，具有相同的容量（例如 N TB）。

MinIO 不区分驱动器类型，也不会从混合存储类型中受益。

此外。MinIO 将每个磁盘使用的大小限制为部署中的最小驱动器。例如，如果部署有 15 个 10TB 磁盘和 1 个 1TB 磁盘，则 MinIO 将每个磁盘的容量限制为 1TB。

MinIO 需要使用扩展表示法 {x...y} 表示创建新部署时的顺序磁盘系列，其中部署中的所有节点都有一组相同的装载驱动器。MinIO 还要求物理磁盘的顺序在重新启动后保持不变，以便给定的装入点始终指向相同格式化的磁盘。因此，MinIO 强烈建议使用 /etc/fstab 或类似的基于文件的挂载配置，以确保驱动器顺序在重新启动后不会更改。

我每一台minio服务器准备了两块磁盘

在分布式环境中启动新的 MinIO 服务器时，存储设备不得具有现有数据。

启动 MinIO 服务器后，与数据的所有交互都必须通过 S3 API 完成。使用 MinIO 客户端、MinIO 控制台或其中一个 MinIO 软件开发工具包来处理存储桶和对象。

在每一个节点上安装minio

下载：

yum install -y wget
wget https://dl.min.io/server/minio/release/linux-amd64/minio
chmod +x minio
sudo mv minio /usr/local/bin/

新建systemd 服务文件：

vi /etc/systemd/system/minio.service

[Unit]
Description=MinIO
Documentation=https://min.io/docs/minio/linux/index.html
Wants=network-online.target
After=network-online.target
AssertFileIsExecutable=/usr/local/bin/minio

[Service]
WorkingDirectory=/usr/local

User=minio-user
Group=minio-user
ProtectProc=invisible

EnvironmentFile=-/etc/default/minio
ExecStartPre=/bin/bash -c "if [ -z \"${MINIO_VOLUMES}\" ]; then echo \"Variable MINIO_VOLUMES not set in /etc/default/minio\"; exit 1; fi"
ExecStart=/usr/local/bin/minio server $MINIO_OPTS $MINIO_VOLUMES

Restart=always

LimitNOFILE=65536

TasksMax=infinity

TimeoutStopSec=infinity
SendSIGKILL=no

[Install]
WantedBy=multi-user.target

创建用户和用户组：

groupadd -r minio-user
useradd -M -r -g minio-user minio-user
chown minio-user:minio-user /mnt/disk1 /mnt/disk2

创建minio配置文件:

minio配置文件全部参数：MinIO Server — MinIO Object Storage for Linux

vi /etc/default/minio

# Set the hosts and volumes MinIO uses at startup
# The command uses MinIO expansion notation {x...y} to denote a
# sequential series.
#
# The following example covers four MinIO hosts
# with 4 drives each at the specified hostname and drive locations.
# The command includes the port that each MinIO server listens on
# (default 9000)

MINIO_VOLUMES="http://minio{1...2}.file.com:9000/mnt/disk{1...2}/minio"

# Set all MinIO server options
#
# The following explicitly sets the MinIO Console listen address to
# port 9001 on all network interfaces. The default behavior is dynamic
# port selection.

MINIO_OPTS="--console-address :9001"

# Set the root username. This user has unrestricted permissions to
# perform S3 and administrative API operations on any resource in the
# deployment.
#
# Defer to your organizations requirements for superadmin user name.

MINIO_ROOT_USER=minioadmin

# Set the root password
#
# Use a long, random, unique string that meets your organizations
# requirements for passwords.

MINIO_ROOT_PASSWORD=minioadmin

# Set to the URL of the load balancer for the MinIO deployment
# This value *must* match across all MinIO servers. If you do
# not have a load balancer, set this value to to any *one* of the
# MinIO hosts in the deployment as a temporary measure.
#这里在实际生产过程种需要写负载均衡url
#我这里只是为了方便，写的本机
MINIO_SERVER_URL="http://192.168.40.139:9000"

运行minio服务：

sudo systemctl start minio.service
sudo systemctl status minio.service
journalctl -f -u minio.service

进入首页：MinIO Console

账号密码都是minioadmin

登录成功，进入首页，创建一个bucket，设置policy为public

上传图片：

测试访问：http://192.168.40.139/file/test-bucket/2.png

访问成功：

说明：

这里使用nginx 做的负载均衡， 当以 /file 开头的路径会代理到两台minio服务。

并且policy设置的是public，可以直接访问。

java api + springboot

配置类：MinioConfiguration.java

@Configuration
public class MinioConfiguration {

    @Bean
    public MinioClient minioClient(MinioProperties minioProperties) {
        return MinioClient.builder()
                .endpoint(minioProperties.getEndpoint())
                .credentials(minioProperties.getAccessKey(), minioProperties.getSecretKey())
                .build();
    }

}

Properties类：MinioProperties

@Data
@ConfigurationProperties("minio")
public class MinioProperties {

    private String endpoint;

    private String accessKey;

    private String secretKey;

}

配置文件 application.yml

minio:
  endpoint: http://xxxxxxxxxxxxx
  accessKey: xxxxxxxxxxxxxxxxxx
  secretKey: xxxxxxxxxxxxxxxxxxx

minio的操作接口：MinioTemplate

public interface MinioTemplate {

    //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~桶操作~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~//

    boolean makeBucket(String bucketName);

    boolean makeBucket(String bucketName, boolean objectLock);

    boolean setBucketPolicy(String bucketName, String policyJson);

    /**
     * 默认从类路径下 policy/policy.json 文件读取
     * @author wen.jie
     * @since 2022/11/10 17:59
     */
    boolean setBucketPolicy(String bucketName);

    boolean makeBucketAndSetPolicy(String bucketName);

    boolean removeBucket(String bucketName);

    boolean bucketExists(String bucketName);

    /**
     * 设置Retention
     * 在设置Retention，该桶必须开启对象锁
     * @author wen.jie
     * @since 2022/11/14 10:43
     * @param mode 保留模式 分为两种
     * {@link RetentionMode#GOVERNANCE} 监管模式:除非用户具有特殊权限，否则用户不能覆盖或删除对象版本，或更改其锁定设置。
     * {@link RetentionMode#COMPLIANCE} 合规性模式:任何用户都不能覆盖或删除受保护的对象版本, 在合规性模式下锁定对象后，
     *             其保留模式便无法更改，其保留期限也不能缩短。
     */
    void setObjectLockConfiguration(String bucket, RetentionMode mode, RetentionDuration retentionDuration);

    ObjectLockConfiguration getObjectLockConfiguration(String bucket);

    void deleteObjectLockConfiguration(String bucket);

    void listenBucketNotification(String bucketName, String[] events, Consumer<NotificationRecords>consumer);

    //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~对象操作~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~//

    ObjectWriteResponse putObject(InputStream inputStream, String bucket, String objectName);

    ObjectWriteResponse putObject(InputStream inputStream, String bucket, String objectName, Map<String, String> userMetadata);

    List<Item> listObjects(String bucket);

    List<String> listObjectNames(String bucket);

    /**
     * @author wen.jie
     * @since 2022/11/11 13:47
     * @param path 路径前缀
     */
    List<Item> listObjects(String bucket, String path);

    List<String> listObjectNames(String bucket, String path);

    List<Item> listObjects(String bucket, String path, int maxKeys, boolean recursive);

    List<String> listObjectNames(String bucket, String path, int maxKeys, boolean recursive);

    /**
     * copy对象
     * @author wen.jie
     * @since 2022/11/11 14:04
     */
    void copyObject(String sourceBucket, String sourceObject, String targetBucket, String targetObject);

    /**
     * @param targetFilePath 下载的文件目标目录
     * @author wen.jie
     * @since 2022/11/11 14:23
     */
    void downloadObject(String bucket, String objectName, String targetFilePath);

    /**
     * @param targetFile 目标文件的路径
     * @author wen.jie
     * @since 2022/11/11 14:23
     */
    void downloadObject(String bucket, String objectName, String targetFile, boolean overwrite);

    /**
     * @return 返回的inputStream需要自行关闭
     * @author wen.jie
     * @since 2022/11/11 15:40
     */
    InputStream getObject(String bucket, String objectName);

    void removeObject(String bucket, String objectName);

    /**
     * 删除指定版本对象
     * @author wen.jie
     * @since 2022/11/14 11:03
     */
    void removeObject(String bucket, String objectName, String versionId);

    void removeObjects(String bucket, List<String> objectNames);

    /**
     * 查询对象的信息
     * @author wen.jie
     * @since 2022/11/14 9:07
     */
    StatObjectResponse statObject(String bucket, String objectName);

    String getPresignedObjectUrl(String bucket, String objectName);

    String getPresignedObjectUrl(String bucket, String objectName, int time, TimeUnit timeUnit, Map<String, String> reqParams);

    //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~对象的tag操作~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~//

    void setObjectTags(String bucket, String objectName, Map<String, String> tags);

    Map<String, String> getObjectTags(String bucket, String objectName);

    void deleteObjectTags(String bucket, String objectName);

    //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~对象的LegalHold操作~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~//

    /**
     * LegalHold 没有相关的保留期，在被删除之前一直有效
     * @author wen.jie
     * @since 2022/11/14 11:15
     */
    void enableObjectLegalHold(String bucket, String objectName, String versionId);

    void disableObjectLegalHold(String bucket, String objectName, String versionId);

    boolean isObjectLegalHoldEnabled(String bucket, String objectName, String versionId);


    Retention  getObjectRetention(String bucket, String objectName, String versionId);
}

实现类：

/**
 * @author wen.jie
 * @description MinioTemplate
 * @since 2022/11/10 17:10
 */
@Slf4j
@Component
public class MinioTemplateImpl implements MinioTemplate {

    private final MinioClient minioClient;

    private final String END_SIGNAL = "/";

    private final String BLANK_CONTENT = "";

    @Override
    public boolean makeBucket(String bucketName) {
        return makeBucket(bucketName, false);
    }

    @Override
    public boolean makeBucket(String bucketName, boolean objectLock) {
        if (bucketExists(bucketName)) return true;
        try {
            minioClient.makeBucket(MakeBucketArgs.builder().bucket(bucketName).objectLock(objectLock).build());
            return true;
        } catch (Exception e) {
            log.warn(e.getMessage());
            return false;
        }
    }

    @Override
    public boolean setBucketPolicy(String bucketName, String policyJson) {
        try {
            SetBucketPolicyArgs args = SetBucketPolicyArgs.builder()
                    .bucket(bucketName).config(policyJson).build();
            minioClient.setBucketPolicy(args);
            return true;
        } catch (Exception e) {
            log.warn(e.getMessage());
            return false;
        }
    }

    @Override
    public boolean setBucketPolicy(String bucketName) {
        if (bucketExists(bucketName)) {
            String policyJson;
            try (InputStream resource = this.getClass().getClassLoader().getResourceAsStream("policy/policy.json")) {
                policyJson = StreamUtils.copyToString(resource, Charset.defaultCharset());
                return setBucketPolicy(bucketName, policyJson.replace("${bucketName}", bucketName));
            } catch (IOException e) {
                log.warn(e.getMessage());
            }
        }
        return false;
    }

    @Override
    public boolean makeBucketAndSetPolicy(String bucketName) {
        return makeBucket(bucketName) && setBucketPolicy(bucketName);
    }

    @Override
    public boolean removeBucket(String bucketName) {
        try {
            if (bucketExists(bucketName))
                minioClient.removeBucket(RemoveBucketArgs.builder().bucket(bucketName).build());
            return true;
        } catch (Exception e) {
            log.warn(e.getMessage());
            return false;
        }
    }

    @Override
    public boolean bucketExists(String bucketName) {
        try {
            return minioClient.bucketExists(BucketExistsArgs.builder().bucket(bucketName).build());
        } catch (Exception e) {
            log.warn(e.getMessage());
            return false;
        }
    }

    @Override
    public void setObjectLockConfiguration(String bucket, RetentionMode retentionMode, RetentionDuration RetentionDuration) {
        try {
            ObjectLockConfiguration config =
                    new ObjectLockConfiguration(retentionMode, RetentionDuration);
            minioClient.setObjectLockConfiguration(
                    SetObjectLockConfigurationArgs.builder().bucket(bucket).config(config).build());
        } catch (Exception e) {
            log.warn(e.getMessage());
        }
    }

    @Override
    public ObjectLockConfiguration getObjectLockConfiguration(String bucket) {
        try {
            return minioClient.getObjectLockConfiguration(
                            GetObjectLockConfigurationArgs.builder().bucket(bucket).build());
        } catch (Exception e) {
            log.warn(e.getMessage());
        }
        return null;
    }

    @Override
    public void deleteObjectLockConfiguration(String bucket) {
        try {
            minioClient.deleteObjectLockConfiguration(
                    DeleteObjectLockConfigurationArgs.builder().bucket(bucket).build());
        } catch (Exception e) {
            log.warn(e.getMessage());
        }
    }

    @Override
    public void listenBucketNotification(String bucketName, String[] events, Consumer<NotificationRecords> consumer) {
        ListenBucketNotificationArgs notificationArgs = ListenBucketNotificationArgs.builder()
                .bucket(bucketName).prefix(BLANK_CONTENT).suffix(BLANK_CONTENT).events(events).build();

        try (CloseableIterator<Result<NotificationRecords>> ci = minioClient.listenBucketNotification(notificationArgs)) {
            while (ci.hasNext()) {
                NotificationRecords records = ci.next().get();
                consumer.accept(records);
            }
        } catch (Exception e) {
            log.warn(e.getMessage());
        }
    }

    @Override
    public ObjectWriteResponse putObject(InputStream inputStream, String bucket, String objectName) {
        return putObject(inputStream, bucket, objectName, null);
    }

    @Override
    public ObjectWriteResponse putObject(InputStream inputStream, String bucket, String objectName, Map<String, String> userMetadata) {
        boolean path = objectName.endsWith(END_SIGNAL);

        try {
            inputStream = inputStream == null ? new ByteArrayInputStream(new byte[] {}) : inputStream;

            long objectSize;
            long partSize;

            //判断路径
            if (path) {
                objectSize = 0;
                partSize = -1;
            } else {
                int available = inputStream.available();
                objectSize = available ==0 ? -1 : available;
                partSize = available != -1 ? -1 : ObjectWriteArgs.MIN_MULTIPART_SIZE;
            }

            PutObjectArgs.Builder builder = PutObjectArgs.builder()
                    .bucket(bucket)
                    .object(objectName)
                    .stream(inputStream, objectSize, partSize)
                    .userMetadata(userMetadata)
                    .contentType(getContentType(objectName));

            if (!path) builder.contentType(getContentType(objectName));

            PutObjectArgs putObjectArgs = builder.build();

            return minioClient.putObject(putObjectArgs);
        } catch (Exception e) {
            log.warn(e.getMessage());
        } finally {
            closeQuietly(inputStream);
        }

        return null;
    }

    @Override
    public List<Item> listObjects(String bucket) {
        return listObjects(bucket, BLANK_CONTENT);
    }

    @Override
    public List<String> listObjectNames(String bucket) {
        return listObjectNames(bucket, BLANK_CONTENT);
    }

    @Override
    public List<Item> listObjects(String bucket, String path) {
        return listObjects(bucket, path, 1000, true);
    }

    @Override
    public List<String> listObjectNames(String bucket, String path) {
        return listObjects(bucket, path).stream().map(Item::objectName)
                .collect(Collectors.toList());
    }

    @Override
    public List<Item> listObjects(String bucket, String path, int maxKeys, boolean recursive) {
        ListObjectsArgs listObjectsArgs = ListObjectsArgs.builder()
                .bucket(bucket)
                .includeUserMetadata(true)
                .prefix(path)
                .maxKeys(maxKeys)
                .recursive(recursive)
                .build();
        Iterable<Result<Item>> results = minioClient.listObjects(listObjectsArgs);

        List<Item> list = new ArrayList<>();
        try {
            for (Result<Item> result : results) {
                Item item = result.get();
                list.add(item);
            }
        } catch (Exception e) {
            log.warn(e.getMessage());
        }
        return list;
    }

    @Override
    public List<String> listObjectNames(String bucket, String path, int maxKeys, boolean recursive) {
        return listObjects(bucket, path, maxKeys, recursive).stream().map(Item::objectName)
                .collect(Collectors.toList());
    }

    @Override
    public void copyObject(String sourceBucket, String sourceObject, String targetBucket, String targetObject) {
        try {
            minioClient.copyObject(
                    CopyObjectArgs.builder()
                            .bucket(targetBucket)
                            .object(targetObject)
                            .source(
                                    CopySource.builder()
                                            .bucket(sourceBucket)
                                            .object(sourceObject)
                                            .build())
                            .build());
        } catch (Exception e) {
            log.warn(e.getMessage());
        }
    }

    @Override
    public void downloadObject(String bucket, String objectName, String targetFilePath) {
        File file = new File(targetFilePath);
        String path = file.getAbsolutePath();
        if (!file.exists()) {
            if (!file.mkdirs()) log.warn("file [{}] mkdirs failed", path);
        }
        File targetFile = new File(path, FilenameUtils.getName(objectName));
        downloadObject(bucket, objectName, targetFile.getAbsolutePath(), true);
    }

    @Override
    public void downloadObject(String bucket, String objectName, String targetFile, boolean overwrite) {
        try {
            minioClient.downloadObject(
                    DownloadObjectArgs.builder()
                            .bucket(bucket)
                            .object(objectName)
                            .filename(targetFile)
                            .overwrite(overwrite)
                            .build());
        } catch (Exception e) {
            log.warn(e.getMessage());
        }
    }

    @Override
    public InputStream getObject(String bucket, String objectName) {
        try {
            return minioClient.getObject(
                    GetObjectArgs.builder()
                            .bucket(bucket)
                            .object(objectName)
                            .build());
        } catch (Exception e) {
            log.warn(e.getMessage());
        }
        return null;
    }

    @Override
    public void removeObject(String bucket, String objectName) {
        removeObject(bucket, objectName, null);
    }

    @Override
    public void removeObject(String bucket, String objectName, String versionId) {
        try {
            minioClient.removeObject(
                    RemoveObjectArgs.builder().bucket(bucket).versionId(versionId).object(objectName).build());
        } catch (Exception e) {
            log.warn(e.getMessage());
        }
    }

    @Override
    public void removeObjects(String bucket, List<String> objectNames) {
        List<DeleteObject> objects =
                objectNames.stream().map(DeleteObject::new).collect(Collectors.toList());

        Iterable<Result<DeleteError>> results =
                minioClient.removeObjects(
                        RemoveObjectsArgs.builder().bucket(bucket).objects(objects).build());

        for (Result<DeleteError> result : results) {
            try {
                DeleteError error = result.get();
                if (error != null)
                    log.error("Error in deleting object [{}] ; [{}]", error.objectName(), error.message());
            } catch (Exception e) {
                log.warn(e.getMessage());
            }
        }
    }

    @Override
    public StatObjectResponse statObject(String bucket, String objectName) {
        try {
            return minioClient.statObject(
                    StatObjectArgs.builder().bucket(bucket).object(objectName).build());
        } catch (Exception e) {
            log.warn(e.getMessage());
        }
        return null;
    }

    @Override
    public String getPresignedObjectUrl(String bucket, String objectName) {
        return getPresignedObjectUrl(bucket, objectName, 7, TimeUnit.DAYS, null);
    }

    @Override
    public String getPresignedObjectUrl(String bucket, String objectName, int time, TimeUnit timeUnit, Map<String, String> reqParams) {

        String url =
                null;
        try {
            url = minioClient.getPresignedObjectUrl(
                    GetPresignedObjectUrlArgs.builder()
                            .method(Method.GET)
                            .bucket(bucket)
                            .object(objectName)
                            .expiry(time, timeUnit)
                            .extraQueryParams(reqParams)
                            .build());
        } catch (Exception e) {
            log.warn(e.getMessage());
        }
        return url;
    }

    @Override
    public void setObjectTags(String bucket, String objectName, Map<String, String> tags) {
        try {
            minioClient.setObjectTags(
                    SetObjectTagsArgs.builder().bucket(bucket).object(objectName).tags(tags).build());
        } catch (Exception e) {
            log.warn(e.getMessage());
        }
    }

    @Override
    public Map<String, String> getObjectTags(String bucket, String objectName) {
        try {
            return minioClient.getObjectTags(
                    GetObjectTagsArgs.builder().bucket(bucket).object(objectName).build()).get();
        } catch (Exception e) {
            log.warn(e.getMessage());
        }
        return Collections.emptyMap();
    }

    @Override
    public void deleteObjectTags(String bucket, String objectName) {
        try {
            minioClient.deleteObjectTags(
                    DeleteObjectTagsArgs.builder().bucket(bucket).object(objectName).build());
        } catch (Exception e) {
            log.warn(e.getMessage());
        }
    }

    @Override
    public void enableObjectLegalHold(String bucket, String objectName, String versionId) {
        try {
            minioClient.enableObjectLegalHold(
                    EnableObjectLegalHoldArgs.builder()
                            .bucket(bucket)
                            .object(objectName)
                            .versionId(versionId)
                            .build());
        } catch (Exception e) {
            log.warn(e.getMessage());
        }
    }

    @Override
    public void disableObjectLegalHold(String bucket, String objectName, String versionId) {
        try {
            minioClient.disableObjectLegalHold(
                    DisableObjectLegalHoldArgs.builder()
                            .bucket(bucket)
                            .versionId(versionId)
                            .object(objectName)
                            .build());
        } catch (Exception e) {
            log.warn(e.getMessage());
        }
    }

    @Override
    public boolean isObjectLegalHoldEnabled(String bucket, String objectName, String versionId) {
        try {
            return minioClient.isObjectLegalHoldEnabled(
                    IsObjectLegalHoldEnabledArgs.builder()
                            .bucket(bucket)
                            .versionId(versionId)
                            .object(objectName)
                            .build());
        } catch (Exception e) {
            log.warn(e.getMessage());
        }
        return false;
    }

    @Override
    public Retention getObjectRetention(String bucket, String objectName, String versionId) {
        try {
            return minioClient.getObjectRetention(
                    GetObjectRetentionArgs.builder()
                            .bucket(bucket)
                            .object(objectName)
                            .versionId(versionId)
                            .build());
        } catch (Exception e) {
            log.warn(e.getMessage());
        }
        return null;
    }

    private String getContentType(String objectName) {
        Optional<MediaType> mediaTypeOpt = MediaTypeFactory.getMediaType(objectName);
        return mediaTypeOpt.orElse(MediaType.APPLICATION_OCTET_STREAM).toString();
    }

    private void closeQuietly(Closeable closeable) {
        if (closeable != null) {
            try {
                closeable.close();
            } catch (IOException e) {
                log.warn(e.getMessage());
            }
        }
    }

    public MinioTemplateImpl(MinioClient minioClient) {
        this.minioClient = minioClient;
    }

}

标签：基本,return,String,objectName,bucket,使用,public,Minio8,minio
From： https://www.cnblogs.com/wwjj4811/p/16888548.html