How to delete objects using OSS SDK for Java - Object Storage Service

Sürüm oluşturmanın etkinleştirildiği bir paketten tek bir nesneyi, birden çok nesneyi veya belirtilen ad önekine sahip nesneleri silin.

Kullanım notları

Bu konuda Çin (Hangzhou) bölgesinin genel uç noktası kullanılmaktadır. Aynı bölgedeki diğer Alibaba Cloud hizmetlerinden OSS'e erişmek için dahili uç nokta kullanın. Desteklenen bölgeler ve uç noktalar hakkında daha fazla bilgi için bkz. Bölgeler ve uç noktalar.
Bu konuda erişim kimlik bilgileri ortam değişkenlerinden alınır. Daha fazla bilgi için bkz. Erişim Kimlik Bilgilerini Yapılandırma.
Bu konu, bir OSS uç noktası kullanarak bir OSSClient örneğinin nasıl oluşturulacağını gösterir. Özel etki alanı kullanımı veya Security Token Service (STS) kimlik bilgileriyle kimlik doğrulama gibi alternatif yapılandırmalar için bkz. İstemci yapılandırması.
Bir nesneyi silmek için oss:DeleteObject iznine sahip olmanız gerekir. Daha fazla bilgi için bkz. Özel ilke atama.

Sürümlü paketlerde silme davranışı

Sürümlü bir paketten bir nesne silerken sürüm kimliği belirtip belirtmeyeceğinize karar vermeniz gerekir.

Sürüm kimliği belirtmeden bir nesne silme (geçici silme)

Bir sürüm kimliği belirtmezseniz OSS mevcut sürümü silmez. Bunun yerine en son sürüm olarak bir silme işaretleyicisi ekler. Sonraki GetObject istekleri yanıtta 404 Not Found durumunu, header:x-oss-delete-marker = true başlığını ve silme işaretleyicisinin x-oss-version-id değerini döndürür.

x-oss-delete-marker değeri true olduğunda x-oss-version-id silme işaretleyicisinin sürüm kimliğini döndürür.
Sürüm kimliği belirterek bir nesne silme (kalıcı silme)

Bir sürüm kimliği belirtirseniz OSS params içindeki versionId parametresini kullanarak ilgili sürümü kalıcı olarak siler. Null ID'ye sahip sürümü silmek için params içinde params['versionId'] = "null" değerini ayarlayın. OSS "null" dizesini hedef sürüm kimliği olarak değerlendirir.

Bir nesne silme

Sürümlü bir paketten bir nesneyi kalıcı veya geçici olarak silin.

Sürüm oluşturmanın etkinleştirildiği bir paketten bir nesneyi kalıcı olarak silme

Sürüm kimliğini belirterek bir nesneyi kalıcı olarak silin:

import com.aliyun.oss.*;
import com.aliyun.oss.common.auth.*;
import com.aliyun.oss.common.comm.SignVersion;

public class Demo {
    public static void main(String[] args) throws Exception {
        // In this example, the endpoint of the China (Hangzhou) region is used. Specify your actual endpoint. 
        String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
        // Obtain access credentials from environment variables. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured. 
        EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
        // Specify the name of the bucket. Example: examplebucket. 
        String bucketName = "examplebucket";
        // Specify the full path of the object. Do not include the bucket name in the full path. 
        String objectName = "exampledir/object";
        String versionId  = "CAEQMxiBgICAof2D0BYiIDJhMGE3N2M1YTI1NDQzOGY5NTkyNTI3MGYyMzJm****";
        // Specify the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou.
        String region = "cn-hangzhou";

        // Create an OSSClient instance. 
        // Call the shutdown method to release resources when the OSSClient is no longer in use.
        ClientBuilderConfiguration clientBuilderConfiguration = new ClientBuilderConfiguration();
        clientBuilderConfiguration.setSignatureVersion(SignVersion.V4);        
        OSS ossClient = OSSClientBuilder.create()
        .endpoint(endpoint)
        .credentialsProvider(credentialsProvider)
        .clientConfiguration(clientBuilderConfiguration)
        .region(region)               
        .build();

        try {
            // Delete the specified version of the object. 
            ossClient.deleteVersion(bucketName, objectName , versionId);
        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
    }
}

Sürüm oluşturmanın etkinleştirildiği bir paketten bir nesneyi geçici olarak silme

Bir sürüm kimliği belirtmeden bir nesneyi geçici olarak silin:

import com.aliyun.oss.*;
import com.aliyun.oss.common.auth.*;
import com.aliyun.oss.common.comm.SignVersion;

public class Demo {
    public static void main(String[] args) throws Exception {
        // In this example, the endpoint of the China (Hangzhou) region is used. Specify your actual endpoint. 
        String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
        // Obtain access credentials from environment variables. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured. 
        EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
        // Specify the name of the bucket. Example: examplebucket. 
        String bucketName = "examplebucket";
        // Specify the full path of the object. Do not include the bucket name in the full path. 
        String objectName = "exampledir/object";
        // Specify the endpoint of the region in which the bucket is located. For example, if your bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou.
        String region = "cn-hangzhou";

        // Create an OSSClient instance. 
        // Call the shutdown method to release resources when the OSSClient is no longer in use.
        ClientBuilderConfiguration clientBuilderConfiguration = new ClientBuilderConfiguration();
        clientBuilderConfiguration.setSignatureVersion(SignVersion.V4);        
        OSS ossClient = OSSClientBuilder.create()
        .endpoint(endpoint)
        .credentialsProvider(credentialsProvider)
        .clientConfiguration(clientBuilderConfiguration)
        .region(region)               
        .build();
        
        try {
            // Temporarily delete the object. A delete marker is added to the object. 
            ossClient.deleteObject(bucketName, objectName);
        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
    }
}

Birden çok nesne silme

Sürümlü bir paketten birden çok nesneyi kalıcı veya geçici olarak silin.

Sürüm oluşturmanın etkinleştirildiği bir paketten birden çok nesneyi kalıcı olarak silme

Sürüm kimliklerini belirterek birden çok nesneyi veya silme işaretleyicisini kalıcı olarak silin:

import com.aliyun.oss.*;
import com.aliyun.oss.common.auth.*;
import com.aliyun.oss.common.comm.SignVersion;
import com.aliyun.oss.model.DeleteVersionsRequest;
import com.aliyun.oss.model.DeleteVersionsResult;
import java.net.URLDecoder;
import java.util.ArrayList;
import java.util.List;

public class Demo {
    public static void main(String[] args) throws Exception {
        // In this example, the endpoint of the China (Hangzhou) region is used. Specify your actual endpoint. 
        String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
        // Obtain access credentials from environment variables. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured. 
        EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
        // Specify the name of the bucket. Example: examplebucket. 
        String bucketName = "examplebucket";
        // Specify the full paths of the objects. Do not include the bucket name in the full paths. 
        String objectName = "exampledir/object";
        String object2Name = "exampledir/object2";
        String yourObjectNameVersionId  = "CAEQMxiBgICAof2D0BYiIDJhMGE3N2M1YTI1NDQzOGY5NTkyNTI3MGYyMzJm****";
        String yourObject2DelMarkerNameVersionId  = "MGE3N2M1YgICAof2D0BYiID3N2M1YTITI1NDQzOGY5NTN2M1YTI1NDQz****";
        
        // Specify the region of the bucket. For example, if your bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou.
        String region = "cn-hangzhou";
        
        // Create an OSSClient instance.
        // Call the shutdown method to release resources when the OSSClient is no longer in use. 
        ClientBuilderConfiguration clientBuilderConfiguration = new ClientBuilderConfiguration();
        clientBuilderConfiguration.setSignatureVersion(SignVersion.V4);        
        OSS ossClient = OSSClientBuilder.create()
        .endpoint(endpoint)
        .credentialsProvider(credentialsProvider)
        .clientConfiguration(clientBuilderConfiguration)
        .region(region)               
        .build();

        try {
            // Delete the objects or delete markers that have specified version IDs. 
            List<DeleteVersionsRequest.KeyVersion> keyVersionsList = new ArrayList<DeleteVersionsRequest.KeyVersion>();
            keyVersionsList.add(new DeleteVersionsRequest.KeyVersion(objectName,yourObjectNameVersionId));
            keyVersionsList.add(new DeleteVersionsRequest.KeyVersion(object2Name,yourObject2DelMarkerNameVersionId));
            DeleteVersionsRequest delVersionsRequest = new DeleteVersionsRequest(bucketName);
            delVersionsRequest.setKeys(keyVersionsList);
            // Initiate a deleteVersions request. 
            DeleteVersionsResult delVersionsResult = ossClient.deleteVersions(delVersionsRequest);

            // View the deletion result. 
            for (DeleteVersionsResult.DeletedVersion delVer : delVersionsResult.getDeletedVersions()) {
                String keyName = URLDecoder.decode(delVer.getKey(), "UTF-8");
                String keyVersionId = delVer.getVersionId();
                String keyDelMarkerId = delVer.getDeleteMarkerVersionId();
                System.out.println("delete key: " + keyName);
                System.out.println("delete key versionId: " + keyVersionId);
                if(keyDelMarkerId != null && keyDelMarkerId.length() != 0){
                    System.out.println("delete key del_marker versionId: " + keyDelMarkerId);
                }
            }
        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
    }
}

Sürüm oluşturmanın etkinleştirildiği bir paketten birden çok nesneyi geçici olarak silme

Sürüm kimlikleri belirtmeden birden çok nesneyi geçici olarak silin:

import com.aliyun.oss.*;
import com.aliyun.oss.common.auth.*;
import com.aliyun.oss.common.comm.SignVersion;
import com.aliyun.oss.model.DeleteObjectsRequest;
import com.aliyun.oss.model.DeleteObjectsResult;
import java.net.URLDecoder;
import java.util.ArrayList;
import java.util.List;

public class Demo {
    public static void main(String[] args) throws Exception {
        // In this example, the endpoint of the China (Hangzhou) region is used. Specify your actual endpoint. 
        String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
        // Obtain access credentials from environment variables. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured. 
        EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
        // Specify the name of the bucket. Example: examplebucket. 
        String bucketName = "examplebucket";
        // Specify the full paths of the objects. Do not include the bucket name in the full paths. 
        String objectName = "exampledir/object";
        String object2Name = "exampledir/object2";

        // Specify the region of the bucket. For example, if your bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou.
        String region = "cn-hangzhou";

        // Create an OSSClient instance. 
        // Call the shutdown method to release resources when the OSSClient is no longer in use.
        ClientBuilderConfiguration clientBuilderConfiguration = new ClientBuilderConfiguration();
        clientBuilderConfiguration.setSignatureVersion(SignVersion.V4);        
        OSS ossClient = OSSClientBuilder.create()
        .endpoint(endpoint)
        .credentialsProvider(credentialsProvider)
        .clientConfiguration(clientBuilderConfiguration)
        .region(region)               
        .build();

        try {
            // Delete multiple objects at a time. 
            List<String> KeysList = new ArrayList<String>();
            KeysList.add(objectName);
            KeysList.add(object2Name);
            DeleteObjectsRequest request = new DeleteObjectsRequest(bucketName);
            request.setKeys(KeysList);
            // Initiate a deleteObjects request. 
            DeleteObjectsResult delObjResult = ossClient.deleteObjects(request);

            // View the deletion result. 
            for (String o : delObjResult.getDeletedObjects()) {
                String keyName = URLDecoder.decode(o, "UTF-8");
                System.out.println("delete key name: " + keyName);
            }
        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
    }
}

Öneke göre nesne silme

Belirtilen ad önekine sahip nesnelerin tüm sürümlerini silin:

import com.aliyun.oss.*;
import com.aliyun.oss.common.auth.*;
import com.aliyun.oss.common.comm.SignVersion;
import com.aliyun.oss.model.*;
import java.util.ArrayList;
import java.util.List;

public class Demo {
    public static void main(String[] args) throws Exception {
        // In this example, the endpoint of the China (Hangzhou) region is used. Specify your actual endpoint. 
        String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
        // Obtain access credentials from environment variables. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured. 
        EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
        // Specify the name of the bucket. Example: examplebucket. 
        String bucketName = "examplebucket";
        // Specify the prefix. 
        String prefix = "yourkeyPrefix";
        
        // Specify the region of the bucket. For example, if your bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou.
        String region = "cn-hangzhou";
        
        // Create an OSSClient instance. 
        // Call the shutdown method to release resources when the OSSClient is no longer in use.
         ClientBuilderConfiguration clientBuilderConfiguration = new ClientBuilderConfiguration();
        clientBuilderConfiguration.setSignatureVersion(SignVersion.V4);        
        OSS ossClient = OSSClientBuilder.create()
        .endpoint(endpoint)
        .credentialsProvider(credentialsProvider)
        .clientConfiguration(clientBuilderConfiguration)
        .region(region)               
        .build();

        try {
            // List the versions of all objects whose names contain the specified prefix and delete the versions. 
            String nextKeyMarker = null;
            String nextVersionMarker = null;
            VersionListing versionListing = null;
            do {
                ListVersionsRequest listVersionsRequest = new ListVersionsRequest()
                        .withBucketName(bucketName)
                        .withKeyMarker(nextKeyMarker)
                        .withVersionIdMarker(nextVersionMarker)
                        .withPrefix(prefix);

                versionListing = ossClient.listVersions(listVersionsRequest);
                if (versionListing.getVersionSummaries().size() > 0) {
                    List<DeleteVersionsRequest.KeyVersion> keyVersionsList = new ArrayList<DeleteVersionsRequest.KeyVersion>();
                    for (OSSVersionSummary ossVersion : versionListing.getVersionSummaries()) {
                        System.out.println("key name: " + ossVersion.getKey());
                        System.out.println("versionid: " + ossVersion.getVersionId());
                        System.out.println("Is delete marker: " + ossVersion.isDeleteMarker());
                        keyVersionsList.add(new DeleteVersionsRequest.KeyVersion(ossVersion.getKey(), ossVersion.getVersionId()));
                    }
                    DeleteVersionsRequest delVersionsRequest = new DeleteVersionsRequest(bucketName).withKeys(keyVersionsList);
                    ossClient.deleteVersions(delVersionsRequest);
                }

                nextKeyMarker = versionListing.getNextKeyMarker();
                nextVersionMarker = versionListing.getNextVersionIdMarker();
            } while (versionListing.isTruncated());
        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
    }
}

İlgili konular

Bir nesne silmek için çağırabileceğiniz API işlemi hakkında daha fazla bilgi için bkz. DeleteObject.
Birden çok nesne silmek için çağırabileceğiniz API işlemi hakkında daha fazla bilgi için bkz. DeleteMultipleObjects.