我尝试使用服务帐户访问Google Drive API。我已经设置了服务帐户来访问Google Directory API，我认为我可以使用相同的服务帐户。这是我的代码，它几乎是不言自明的。
exec()但是，我得到了＃com; go.google.api.client.auth.oauth2.TokenResponseException：401 Unauthorized＆＃34;在 private static List<File> retrieveAllFiles(Drive service) throws IOException {
List<File> result = new ArrayList<File>();
Files.List request = service.files().list();
do {
FileList files = request.execute();
result.addAll(files.getItems());
request.setPageToken(files.getNextPageToken());
} while (request.getPageToken() != null &&
request.getPageToken().length() > 0);
return result;
}
public static Drive getDriveService(){
GoogleDriectoryService GDservice = new GoogleDriectoryService();
java.io.File serviceAccountP12Certificate = GDservice.loadF("resources/APIProject-62d885cdf671.p12");
HttpTransport httpTransport = new NetHttpTransport();//?
JacksonFactory jsonFactory = new JacksonFactory();//?
GoogleCredential credential = new GoogleCredential.Builder()
.setTransport(httpTransport)
.setJsonFactory(jsonFactory)
.setServiceAccountId(serviceAccountEmailAddress)
.setServiceAccountScopes(Arrays.asList(DriveScopes.DRIVE))
.setServiceAccountUser(serviceAccountUser)
.setServiceAccountPrivateKeyFromP12File(serviceAccountP12Certificate)
.build();
Drive service = new Drive.Builder(httpTransport, jsonFactory, credential)
.setApplicationName("radiantlogic-vds").build();
return service;
}
public static void main(String[] args){
Drive service = getDriveService();
List<File> files = retrieveAllFiles(service);
System.out.println(files);
}
行。任何帮助表示赞赏。