如何通过java sdk更改AWS S3对象上的存储类

Question

我是 AWS 新手，我需要为 s3 存储桶中现有的对象设置存储类别。如何使用 java SDK 更改 S3 中对象的存储类别

Answer 1

在任何情况下都不需要使用已弃用的方法。 就我而言，需要更新现有对象：

   AmazonS3Client s3Client =  (AmazonS3Client)AmazonS3ClientBuilder.standard()
                .withRegion(clientRegion)
                .withCredentials(new ProfileCredentialsProvider())
                .build();
  CopyObjectRequest copyRequest = new CopyObjectRequest(sourceBucketName, sourceKey, destinationBucketName, destinationKey)
        .withStorageClass(StorageClass.ReducedRedundancy);
        s3Client.copyObject(copyRequest);

Answer 2

使用 changeObjectStorageClass看起来非常简单：

AmazonS3Client s3Client = (AmazonS3Client)AmazonS3ClientBuilder.standard()
                    .withRegion(clientRegion)
                    .withCredentials(new ProfileCredentialsProvider())
                    .build();

PutObjectRequest request = new PutObjectRequest(bucketName,
                                                fileObjKeyName, new File(fileName));
ObjectMetadata metadata = new ObjectMetadata();
metadata.setContentType("binary/octet-stream");
request.setMetadata(metadata);
s3Client.putObject(request);

s3Client.changeObjectStorageClass(bucketName, fileObjKeyName,
                                  StorageClass.ReducedRedundancy );

唯一奇怪的部分是您需要在

changeObjectStorageClass

的实例上使用

AmazonS3Client

- 接口

AmazonS3

上的版本已弃用。

Answer 3

以下是更新后的 AWS for Java V2 响应。此代码将对象放置在 Glacier Deep Archive 存储类中。

 public static String copyBucketObject (S3Client s3, String fromBucket, String objectKey, String toBucket) {
        CopyObjectRequest copyReq = CopyObjectRequest.builder()
            .sourceBucket(fromBucket)
            .sourceKey(objectKey)
            .storageClass("DEEP_ARCHIVE")
            .destinationBucket(toBucket)
            .destinationKey(objectKey)
            .build();

        try {
            CopyObjectResponse copyRes = s3.copyObject(copyReq);
            return copyRes.copyObjectResult().toString();

        } catch (S3Exception e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
        return "";
    }