Cant generate a download link for a file that exists in virtual directory in azure using spring boot

i have a container which consists of many virtual directories for example :
https://accountName.blob.core.windows.net/containerName/blobName , and the blob name is a virtual directory on azure let's say for example : number/name/UUID/anotherUUID/file.txt and iam trying to download the file.txt but each time i get the following error :
<Code>BlobNotFound</Code>
although i can generate the download link using sas token from azure portal and get a download link for the file and it is downloaded succesfully , but when i generate the download link from inside my spring boot application i get the error above .

here is the code for uploading a blob :

    BlobClient blob = container.getBlobClient(filePath); // where file path is the virutal directory path
     blob.upload(BinaryData.fromBytes(bytes));

and here is the code for downloading the blob :

 BlobClient blobClient = blobServiceClient.getBlobContainerClient(container name)
          .getBlobClient(filepath);

      OffsetDateTime expiryTime = OffsetDateTime.now()
                                                .plusDays(1);
      BlobSasPermission permission = new BlobSasPermission().setReadPermission(true);
      BlobServiceSasSignatureValues values = new BlobServiceSasSignatureValues(expiryTime, permission).setStartTime(
          OffsetDateTime.now());
      String sasToken = blobClient.generateSas(values);

      String fileUrl = blobClient.getBlobUrl();
      StringBuilder stringBuilder = new StringBuilder(fileUrl);
      stringBuilder.append("?");
      String last = stringBuilder.toString();
      String result = java.net.URLDecoder.decode(last, StandardCharsets.UTF_8.name());

      return result+sasToken;

I have reproduced your requirement in my environment using below code and got expected results. Check if it helps you to fix the issue and achieve your requirement.

• Be sure that your container has the required privileges.

Here, I'm using the post mapping to upload the file via REST API call.

@PostMapping("/upload")
	public String uploadFile(@RequestParam(value = "file") MultipartFile file) throws IOException {

		String str = "DefaultEndpointsProtocol=https;AccountName=<your_account_name>;AccountKey=<your_account_key>;EndpointSuffix=core.windows.net";

		OffsetDateTime expiryTime = OffsetDateTime.now().plusDays(1);
		BlobSasPermission permission = new BlobSasPermission().setReadPermission(true);
		BlobServiceSasSignatureValues values = new BlobServiceSasSignatureValues(expiryTime, permission)
				.setStartTime(OffsetDateTime.now());
		BlobContainerClient container = new BlobContainerClientBuilder().connectionString(str)
				.containerName("<your_container_name>").buildClient();

		BlobClient blob = container.getBlobClient("ParentDir/"+"ChildDir/"+file.getOriginalFilename());
		blob.upload(file.getInputStream(), file.getSize(), true);
		String sasToken = blob.generateSas(values);

		String  result  = java.net.URLDecoder.decode(blob.getBlobUrl()  +  "?",  StandardCharsets.UTF_8.name());

     return result +  sasToken;
}

Update:

when calling the BlobClient class, if we pass the filename as parameter in the container.getBlobClient(), it will create file inside the container.
To create file inside the directory, we have to pass directory with / along with the filename inside the container.getBlobClient() as shown below:

BlobClient blob = container.getBlobClient("ParentDir/"+"ChildDir/"+file.getOriginalFilename());

Updated Output:

I could download the file with the generated URL as shown below: