如何在Java中从Google Drive API获取Gdoc内容？

<dependency>
    <groupId>com.google.api-client</groupId>
    <artifactId>google-api-client</artifactId>
    <version>1.31.0</version>
</dependency>
<dependency>
    <groupId>com.google.oauth-client</groupId>
    <artifactId>google-oauth-client-jetty</artifactId>
    <version>1.31.0</version>
</dependency>
<dependency>
    <groupId>com.google.apis</groupId>
    <artifactId>google-api-services-drive</artifactId>
    <version>v3-rev305-1.25.0</version>
</dependency>

GoogleCredential credential = new GoogleCredential.Builder()
    .setTransport(HTTP_TRANSPORT)
    .setJsonFactory(JSON_FACTORY)
    .setClientSecrets(CLIENT_ID, CLIENT_SECRET)
    .build();

Drive drive = new Drive.Builder(HTTP_TRANSPORT, JSON_FACTORY, credential)
    .setApplicationName(APPLICATION_NAME)
    .build();

String fileId = "your-file-id";
String mimeType = "application/pdf"; // 导出为PDF格式
OutputStream outputStream = new FileOutputStream("output.pdf"); // 导出内容保存到文件中

drive.files().export(fileId, mimeType)
    .executeMediaAndDownloadTo(outputStream);