Amazon Web Services (AWS) S3 Java create a sub directory (object)

Question

I am familiar with AWS Java SDK, I also tried to browse the corresponding Javadoc, but I could not realize how do I create a sub directory, i.e., a directory object within a buc

Answer 1

In newer versions of the SDK, you can do something like this (no need to create empty InputStream) to create an empty folder:

String key = parentKey + newFolderName;
if (!StringUtils.endsWith(key, "/")) {
    key += "/";
}

PutObjectRequest putRequest = PutObjectRequest.builder()
        .bucket(parent.getBucket())
        .key(key)
        .acl("public-read")
        .build();
s3Client.putObject(putRequest, RequestBody.empty());