AWS S3 uploaded file was not shown on cyberduck - spring

Question

I am trying to write an API for uploading and downloading files. After I uploaded a test file, it was not shown on cyberduck, but I can download the test file that I just uploaded.
Then I try to download the file that exist on cyberduck, but it shows
com.emc.object.s3.S3Exception: The specified key does not exist.
API code:
StorageImpl.java
#Service
public class StorageImpl implements Storage {
private static Logger logger = LoggerFactory.getLogger(Storage.class);
#Value("${storage.file.repository}")
private String fileRepository;
#Value("${object.storage.user}")
private String oUser;
#Value("${object.storage.endpoint}")
private String endpoint;
#Value("${object.storage.bucket}")
private String nBucket;
#Value("${object.storage.key.secret}")
private String nSecret;
#Value("${object.storage.region.name}")
private String nRegion;
private S3Client s3client;
public StorageImpl() {
}
#Inject
void init() {
try {
s3client = this.getS3Client();
} catch (Exception e) {
e.printStackTrace();
}
}
private S3Client getS3Client() {
if (s3client == null) {
try {
SSLContext sc = SSLContext.getInstance("TLSv1.2");
sc.init(null, null, new java.security.SecureRandom());
HttpsURLConnection.setDefaultSSLSocketFactory(new PreferredCipherSuiteSSLSocketFactory(sc.getSocketFactory()));
String hostname = "";
URI uri = null;
try {
uri = new URI(endpoint);
hostname = uri.getHost();
} catch (URISyntaxException e) {
logger.error("URL " + endpoint + " is a malformed URL");
e.printStackTrace();
}
S3Config config = null;
config = new S3Config(new URI(endpoint)).withUseVHost(false);
logger.debug("oUser=" + oUser + ", secret=" + nSecret + ", endpoint=" + endpoint);
config.withIdentity(oUser).withSecretKey(nSecret);
logger.debug("");
config.setSignMetadataSearch(true);
s3client = new S3JerseyClient(config, new URLConnectionClientHandler());
logger.debug("s3client initiated. endpoint: " + endpoint);
} catch (Exception ex) {
logger.error(ex.getMessage(), ex);
}
}
return s3client;
}
private File convertMultiPartFileToFile(final MultipartFile multipartFile) {
final File file = new File(multipartFile.getOriginalFilename());
try (final FileOutputStream outputStream = new FileOutputStream(file)) {
outputStream.write(multipartFile.getBytes());
} catch (IOException e) {
logger.error("Error {} occurred while converting the multipart file", e.getLocalizedMessage());
}
return file;
}
#Override
public void save(final MultipartFile multipartFile) {
try {
final File file = convertMultiPartFileToFile(multipartFile);
logger.info("Uploading file with name {}", file.getName());
final PutObjectRequest putObjectRequest = new PutObjectRequest(nBucket, file.getName(), file);
s3client.putObject(putObjectRequest);
Files.delete(file.toPath()); // Remove the file locally created in the project folder
} catch (AmazonServiceException e) {
logger.error("Error {} occurred while uploading file", e.getLocalizedMessage());
} catch (IOException ex) {
logger.error("Error {} occurred while deleting temporary file", ex.getLocalizedMessage());
}catch(S3Exception ae){
ae.printStackTrace();
logger.error("", ae);
}
}
#Override
public InputStream retrieve(String fileName) {
return s3client.getObject(nBucket, fileName).getObject();
}
}
FileController.java
#RestController
#RequestMapping("/files")
#CrossOrigin(origins = "*", maxAge = 3600)
public class FileController {
private static final String MESSAGE_1 = "Uploaded the file successfully";
private static final String FILE_NAME = "fileName";
#Autowired
protected StorageImpl storageImpl;
#Autowired
protected FileService fileService;
#GetMapping
public ResponseEntity<Object> findByName(#RequestParam("fileName") String fileName) {
return ResponseEntity
.ok()
.cacheControl(CacheControl.noCache())
.header("Content-type", "application/octet-stream")
.header("Content-disposition", "attachment; filename=\"" + fileName + "\"")
.body(new InputStreamResource(storageImpl.retrieve(fileName)));
}
#PostMapping
public ResponseEntity<Object> save(#RequestParam("file") MultipartFile multipartFile) {
storageImpl.save(multipartFile);
return new ResponseEntity<>(MESSAGE_1, HttpStatus.OK);
}
}
What are the possible reasons causing this bug?