文件 AWS 開發套件範例 GitHub 儲存庫中有更多可用的 [AWS SDK 範例](https://github.com/awsdocs/aws-doc-sdk-examples)。

本文為英文版的機器翻譯版本，如內容有任何歧義或不一致之處，概以英文版為準。

# 使用 AWS SDK 刪除未完成的分段上傳至 Amazon S3
<a name="s3_example_s3_Scenario_AbortMultipartUpload_section"></a>

下列程式碼範例示範如何刪除或停止未完成的 Amazon S3 分段上傳。

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#### [ Java ]

**SDK for Java 2.x**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/s3#code-examples)中設定和執行。
若要停止進行中，或因任何原因未完成的分段上傳，您可以取得上傳清單，然後將其刪除，如下列範例所示。  

```
    /**
     * Aborts all incomplete multipart uploads from the specified S3 bucket.
     * <p>
     * This method retrieves a list of all incomplete multipart uploads in the specified S3 bucket,
     * and then aborts each of those uploads.
     */
    public static void abortIncompleteMultipartUploadsFromList() {
        ListMultipartUploadsRequest listMultipartUploadsRequest = ListMultipartUploadsRequest.builder()
            .bucket(bucketName)
            .build();

        ListMultipartUploadsResponse response = s3Client.listMultipartUploads(listMultipartUploadsRequest);
        List<MultipartUpload> uploads = response.uploads();

        AbortMultipartUploadRequest abortMultipartUploadRequest;
        for (MultipartUpload upload : uploads) {
            abortMultipartUploadRequest = AbortMultipartUploadRequest.builder()
                .bucket(bucketName)
                .key(upload.key())
                .expectedBucketOwner(accountId)
                .uploadId(upload.uploadId())
                .build();

            AbortMultipartUploadResponse abortMultipartUploadResponse = s3Client.abortMultipartUpload(abortMultipartUploadRequest);
            if (abortMultipartUploadResponse.sdkHttpResponse().isSuccessful()) {
                logger.info("Upload ID [{}] to bucket [{}] successfully aborted.", upload.uploadId(), bucketName);
            }
        }
    }
```
若要刪除某日期之前或之後啟動的未完成分段上傳，您可以根據時間點選擇性地刪除分段上傳，如下列範例所示。  

```
    static void abortIncompleteMultipartUploadsOlderThan(Instant pointInTime) {
        ListMultipartUploadsRequest listMultipartUploadsRequest = ListMultipartUploadsRequest.builder()
            .bucket(bucketName)
            .build();

        ListMultipartUploadsResponse response = s3Client.listMultipartUploads(listMultipartUploadsRequest);
        List<MultipartUpload> uploads = response.uploads();

        AbortMultipartUploadRequest abortMultipartUploadRequest;
        for (MultipartUpload upload : uploads) {
            logger.info("Found multipartUpload with upload ID [{}], initiated [{}]", upload.uploadId(), upload.initiated());
            if (upload.initiated().isBefore(pointInTime)) {
                abortMultipartUploadRequest = AbortMultipartUploadRequest.builder()
                    .bucket(bucketName)
                    .key(upload.key())
                    .expectedBucketOwner(accountId)
                    .uploadId(upload.uploadId())
                    .build();

                AbortMultipartUploadResponse abortMultipartUploadResponse = s3Client.abortMultipartUpload(abortMultipartUploadRequest);
                if (abortMultipartUploadResponse.sdkHttpResponse().isSuccessful()) {
                    logger.info("Upload ID [{}] to bucket [{}] successfully aborted.", upload.uploadId(), bucketName);
                }
            }
        }
    }
```
如果您可以在開始分段上傳後存取上傳 ID，便可以使用 ID 刪除進行中的上傳。  

```
    static void abortMultipartUploadUsingUploadId() {
        String uploadId = startUploadReturningUploadId();
        AbortMultipartUploadResponse response = s3Client.abortMultipartUpload(b -> b
            .uploadId(uploadId)
            .bucket(bucketName)
            .key(key));

        if (response.sdkHttpResponse().isSuccessful()) {
            logger.info("Upload ID [{}] to bucket [{}] successfully aborted.", uploadId, bucketName);
        }
    }
```
若要持續刪除某特定天數之前未完成的分段上傳，請設定儲存貯體的儲存貯體生命週期組態。下列範例示範如何建立規則，以刪除超過 7 天的未完成上傳。  

```
    static void abortMultipartUploadsUsingLifecycleConfig() {
        Collection<LifecycleRule> lifeCycleRules = List.of(LifecycleRule.builder()
            .abortIncompleteMultipartUpload(b -> b.
                daysAfterInitiation(7))
            .status("Enabled")
            .filter(SdkBuilder::build) // Filter element is required.
            .build());

        // If the action is successful, the service sends back an HTTP 200 response with an empty HTTP body.
        PutBucketLifecycleConfigurationResponse response = s3Client.putBucketLifecycleConfiguration(b -> b
            .bucket(bucketName)
            .lifecycleConfiguration(b1 -> b1.rules(lifeCycleRules)));

        if (response.sdkHttpResponse().isSuccessful()) {
            logger.info("Rule to abort incomplete multipart uploads added to bucket.");
        } else {
            logger.error("Unsuccessfully applied rule. HTTP status code is [{}]", response.sdkHttpResponse().statusCode());
        }
    }
```
+ 如需 API 詳細資訊，請參閱《*AWS SDK for Java 2.x API 參考*》中的下列主題。
  + [AbortMultipartUpload](https://docs.aws.amazon.com/goto/SdkForJavaV2/s3-2006-03-01/AbortMultipartUpload)
  + [ListMultipartUploads](https://docs.aws.amazon.com/goto/SdkForJavaV2/s3-2006-03-01/ListMultipartUploads)
  + [PutBucketLifecycleConfiguration](https://docs.aws.amazon.com/goto/SdkForJavaV2/s3-2006-03-01/PutBucketLifecycleConfiguration)

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