import org.telegram.telegrambots.api.methods.GetFile; //导入依赖的package包/类
/**
 * @return a list of {@literal Triplet<byte[] data, String filename, String fileExtension>}
 */
private Triplet<byte[], String, String> downloadFromFileId(String fileId) throws TelegramApiException, IOException {
    GetFile getFile = new GetFile();
    getFile.setFileId(fileId);

    File file = execute(getFile);
    URL fileUrl = new URL(file.getFileUrl(configs.get(TOKEN_KEY)));
    HttpURLConnection httpConn = (HttpURLConnection) fileUrl.openConnection();
    InputStream inputStream = httpConn.getInputStream();
    byte[] output = IOUtils.toByteArray(inputStream);

    String fileName = file.getFilePath();
    String[] fileNameSplitted = fileName.split("\\.");
    String extension = fileNameSplitted[fileNameSplitted.length - 1];
    String filenameWithoutExtension = fileName.substring(0, fileName.length() - extension.length() - 1);

    inputStream.close();
    httpConn.disconnect();

    return new Triplet<>(output, filenameWithoutExtension, extension);
}
 

import org.telegram.telegrambots.api.methods.GetFile; //导入依赖的package包/类
public void onUpdateReceived(Update update) {
	if (update.hasMessage() && update.getMessage().hasPhoto()) {
		Message message = update.getMessage();
		long chatId = message.getChatId();
		// get the last photo - it seems to be the bigger one
		List<PhotoSize> photos = message.getPhoto();
		PhotoSize photo = photos.get(photos.size() - 1);
		String id = photo.getFileId();
		try {
			GetFile getFile = new GetFile();
			getFile.setFileId(id);
			String filePath = getFile(getFile).getFileUrl(getBotToken());
			// TODO: cache images?
			logger.info("== DOWNLOADING IMAGE " + filePath);
			URL url = new URL(filePath);
			String caption = Classifier.classify(url.openStream());
			logger.info("Caption for image " + filePath + ":\n" + caption);
			sendPhotoMessage(chatId, id, caption);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}
 

import org.telegram.telegrambots.api.methods.GetFile; //导入依赖的package包/类
private String getRelativeFilePath(String fileId) {
	Objects.requireNonNull(fileId);

	GetFile getFileMethod = new GetFile();
	getFileMethod.setFileId(fileId);
	try {
		File file = tgBot.execute(getFileMethod);
		return file.getFilePath();
	} catch (TelegramApiException e) {
		throw new IllegalStateException(e);
	}

}
 

import org.telegram.telegrambots.api.methods.GetFile; //导入依赖的package包/类
public void getFileAsync(GetFile getFile, SentCallback<File> sentCallback) throws TelegramApiException {
    if (getFile == null) {
        throw new TelegramApiException("Parameter getFile can not be null");
    } else if (getFile.getFileId() == null) {
        throw new TelegramApiException("Attribute file_id in parameter getFile can not be null");
    }

    sendApiMethodAsync(getFile, sentCallback);
}
 

import org.telegram.telegrambots.api.methods.GetFile; //导入依赖的package包/类
public static BotApiMethod getGetFile() {
    return new GetFile()
            .setFileId("FileId");
}
 

import org.telegram.telegrambots.api.methods.GetFile; //导入依赖的package包/类
private File downloadFileWithId(String fileId) throws TelegramApiException {
  return sender.downloadFile(sender.getFile(new GetFile().setFileId(fileId)));
}
 

import org.telegram.telegrambots.api.methods.GetFile; //导入依赖的package包/类
private File downloadFileWithId(String fileId) throws TelegramApiException {
  return sender.downloadFile(sender.execute(new GetFile().setFileId(fileId)));
}