使用AWS SDK V2删除对象?

以前接受的答案非常有用,尽管它不是100%完整。我用它来写下面的方法。它基本上可以工作,尽管我还没有测试过它的错误处理能力。

• String 传入键,这些键被转换为
  ObjectIdentifier deleteObjects 要求。
• s3Client log 假定已在其他位置初始化。如果您不需要日志记录,请随意删除它。

• 该方法当前返回成功删除的次数。

  public int deleteS3Objects(String bucketName, String[] keys) {
  
  List<ObjectIdentifier> objIds = Arrays.stream(keys)
          .map(key -> ObjectIdentifier.builder().key(key).build())
          .collect(Collectors.toList());
  try {
      DeleteObjectsRequest dor = DeleteObjectsRequest.builder()
              .bucket(bucketName)
              .delete(Delete.builder().objects(objIds).build())
              .build();
  
      DeleteObjectsResponse delResp = s3client.deleteObjects(dor);
  
      if (delResp.errors().size() > 0) {
          String err = String.format("%d errors returned while deleting %d objects",
                  delResp.errors().size(), objIds.size());
          log.warn(err);
      }
      if (delResp.deleted().size() < objIds.size()) {
          String err = String.format("%d of %d objects deleted",
                  delResp.deleted().size(), objIds.size());
          log.warn(err);
      }
      return delResp.deleted().size();
  }
  catch(AwsServiceException e) {
      // The call was transmitted successfully, but Amazon S3 couldn't process 
      // it, so it returned an error response.
      log.error("Error received from S3 while attempting to delete objects", e);
  }
  catch(SdkClientException e) {
      // Amazon S3 couldn't be contacted for a response, or the client
      // couldn't parse the response from Amazon S3.
      log.error("Exception occurred while attempting to delete objects from S3", e);
  }
  return 0;
  }
  

删除对象 Delete.Builder 和 目标识别器 钥匙但是 getObject 和 putObject 接受字符串键。为什么不呢 DeleteObjectsRequest.Builder keys() 方法?他们还没有正式表示SDK已经可以生产了,所以其中一些可能会发生变化。)

看起来需要更多的对象来分配s3中对象的键。这是未经测试的,我把方法的链接放在了最后。

System.out.println("Deleting objects from S3 bucket: " + bucket_name);

for (String k : object_keys) {
    System.out.println(" * " + k);
}

Region region = Region.US_WEST_2;
S3Client s3 = S3Client.builder().region(region).build();

try {

   ObjectIdentifier objectToDelete = ObjectIdentifier.Builder()
            .key(KEY_OBJECT_TO_DELETE);

   Delete delete_me Delete.Builder.objects(objectToDelete) 

   DeleteObjectsRequest dor = DeleteObjectsRequest.builder()
            .bucket(bucket_name)
            .delete(delete_me)
            .build();

    s3.deleteObjects(dor);

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

要删除的键 https://sdk.amazonaws.com/java/api/latest/software/amazon/awssdk/services/s3/model/ObjectIdentifier.html#key--

删除对象 https://sdk.amazonaws.com/java/api/latest/software/amazon/awssdk/services/s3/model/ObjectIdentifier.Builder.html