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

This worked for me. I used spring boot and file uploaded according to Multipart mechanism. I wanted to save my images inside the photos folder in my aws s3 bucket. My need is save like this photos/mypic.jpg

----controller class method----

@PostMapping("/uploadFile")
    public String uploadFile(@RequestPart(value = "file") MultipartFile file) throws IOException {
        return this.amazonClient.uploadFile(file);
}

----service class (Implementation of controller)----

 public String uploadFile(MultipartFile multipartFile) throws IOException {
    
            try {
                File file = convertMultiPartToFile(multipartFile);
                String fileName = "photoes/"+generateFileName(multipartFile);  //here give any folder name you want
                uploadFileTos3bucket(fileName, file);
            } catch (AmazonServiceException ase) {
                logger.info("Caught an AmazonServiceException from GET requests, rejected reasons:");
            }
            return fileName;
        }

The point is concatenate the folder name you want as prefix of the fileName

additionally I will show you how to delete folder. The point is give the folder name as the keyName(key name is uploaded object name in the s3 bucket.). I will show code snippet also.

----controller class method----

@DeleteMapping("/deleteFile")
    public String deleteFile(@RequestPart(value = "keyName") String keyName) {
        return this.amazonClient.deleteFile(keyName);
    }

----service class (Implementation of controller)----

 public String deleteFile(String keyName){
        try {
            s3client.deleteObject(new DeleteObjectRequest(bucketName, keyName));
        } catch (SdkClientException e) {
            e.printStackTrace();
        }
        return "deleted file successfully!";
    }

for delete photos folder that we created , call method like this. deleteFile("photos/") important:- / is mandatory