Question

我试图删除我的s3存储桶中的对象，当它们达到一定限度后说大约20个对象。我在Java SDK中使用了这段代码。

AWSCredentials credentials = new BasicAWSCredentials(accessKey, secretKey);

    AmazonS3 s3 = new AmazonS3Client(credentials);
    String bucketName = "testbucket";
        System.out.println("Listing objects");
        ListObjectsRequest listObjectsRequest = new ListObjectsRequest()
        .withBucketName(bucketName);
        ObjectListing objectListing = s3.listObjects(listObjectsRequest);
        int count = 0;
        for (S3ObjectSummary objectSummary : objectListing.getObjectSummaries()) {
            count = count + 1;
            if (count < 20)
            {
                System.out.println("Keep Counting");
            }

            else {
                    String key = objectSummary.getKey();
                    s3.deleteObject(bucketName, key);
                }
      }
   }
}

但是这只会删除前20个对象之后的那些对象。但是，一旦桶中的对象数量超过20+，我希望在s3中删除所有文件。我该怎么做谢谢你的帮助。

Answer 1

你需要在你的循环之外检查size > 20。此外，一次可以提取的最大摘要数为1000 - 因此，您需要检查是否有更多摘要，将其拉出并删除它们。

AWSCredentials credentials = new BasicAWSCredentials(accessKey, secretKey);
AmazonS3 s3 = new AmazonS3Client(credentials);
String bucketName = "testbucket";
System.out.println("Listing objects");
ListObjectsRequest listObjectsRequest = new ListObjectsRequest().withBucketName(bucketName);
ObjectListing objectListing = s3.listObjects(listObjectsRequest);
int count = 0;
List<S3ObjectSummary> summaries = objectListing.getObjectSummaries();
if(summaries.size() > 20) // Delete only when the size of bucket is > 20
{
    for(;;)
    {
        for (S3ObjectSummary objectSummary : summaries)
        {
            String key = objectSummary.getKey();
            s3.deleteObject(bucketName, key);
        }
        if(!objectListing.isTruncated())  // Max of 1000 summaries are fetched in 1 pull
        {
            break;
        }
        objectListing = s3.listNextBatchOfObjects(objectListing);
        summaries = objectListing.getObjectSummaries();
    }
}

在对象达到某个数字20之后，如何删除Amazon s3中的对象

1 个答案: