AWS S3 - Listing all objects inside a folder without the prefix

Question

I'm having problems retrieving all objects(filenames) inside a folder in AWS S3. Here's my code:

ListObjectsRequest listObjectsRequest = new ListObjectsRequest()
            .withBucketName(bucket)
            .withPrefix(folderName + "/")
            .withMarker(folderName + "/")

    ObjectListing objectListing = amazonWebService.s3.listObjects(listObjectsRequest)

    for (S3ObjectSummary summary : objectListing.getObjectSummaries()) {
        print summary.getKey()
    }

It returns the correct object but with the prefix in it, e.g. foldename/filename

I know I can just use java perhaps substring to exclude the prefix but I just wanted to know if there is a method for it in AWS SDK.

Answer 1

This code help me to find sub-directory of my bucket.

Example :- "Testing" is a my bucket name , inside that contain "[email protected] " folder then its contain "IMAGE" folder in which contain image files.

     ArrayList<String> transferRecord = new ArrayList<>();    

     ListObjectsRequest listObjectsRequest =
                            new ListObjectsRequest()
                                    .withBucketName(Constants.BUCKET_NAME)
                                    .withPrefix("[email protected]" + "/IMAGE");

      ObjectListing objects = s3.listObjects(listObjectsRequest);
        for (;;) {
                    List<S3ObjectSummary> summaries = 
                    objects.getObjectSummaries();
                        if (summaries.size() < 1) {
                            break;
                        }

                       for(int i=0;i<summaries.size();i++){
                            ArrayList<String> file = new ArrayList<>();

                            file.add(summaries.get(i).getKey());
                            transferRecord.add(file);
                        }

                        objects = s3.listNextBatchOfObjects(objects);
               }

I hope this helps you.