String[] allowedExtension, long maxSize, boolean needDatePathAndRandomName)
throws InvalidExtensionException, FileSizeLimitExceededException, IOException, FileNameLengthLimitExceededException {
int fileNamelength = file.getOriginalFilename().length();
if (fileNamelength > FileUploadUtils.DEFAULT_FILE_NAME_LENGTH) {
throw new FileNameLengthLimitExceededException(file.getOriginalFilename(), fileNamelength, FileUploadUtils.DEFAULT_FILE_NAME_LENGTH);
}
assertAllowed(file, allowedExtension, maxSize);
String filename = extractFilename(file, baseDir, needDatePathAndRandomName);