在google drive rest api java中插入文件时的权限异常

我试图使用驱动器休息api将文件上传到谷歌驱动器，跟随此tutorial .

对于授权，功能是：

public static Credential authorize() throws IOException {
    // Load client secrets.
    InputStream in =
        DriveQuickstart.class.getResourceAsStream("client_secret.json");
    GoogleClientSecrets clientSecrets =
        GoogleClientSecrets.load(JSON_FACTORY, new InputStreamReader(in));

    // Build flow and trigger user authorization request.
    GoogleAuthorizationCodeFlow flow =
            new GoogleAuthorizationCodeFlow.Builder(
                    HTTP_TRANSPORT, JSON_FACTORY, clientSecrets, SCOPES)
            .setDataStoreFactory(DATA_STORE_FACTORY)
            .setAccessType("offline")
            .build();
    Credential credential = new AuthorizationCodeInstalledApp(
        flow, new LocalServerReceiver()).authorize("user");
    System.out.println(
            "Credentials saved to " + DATA_STORE_DIR.getAbsolutePath());
    return credential;
}

我获取驱动器中所有文件的功能完全正常 .

private static void listFiles(Drive service) throws IOException
{
     // Print the names and IDs for up to 10 files.
    FileList result = service.files().list().setMaxResults(10).execute();
    List<File> files = result.getItems();
    if (files == null || files.size() == 0) {
        System.out.println("No files found.");
    } else {
        System.out.println("Files:");
        for (File file : files) {
            System.out.printf("%s (%s)\n", file.getTitle(), file.getId());
        }
    }
}

但是当我尝试在驱动器中创建和插入文件时，我得到异常，函数和异常如下：

private static void insertFile(Drive service, String title, String description) {
      // File's metadata.
      File file = new File();
      file.setTitle(title);
      file.setDescription(description);
      file.setMimeType("application/vnd.google-apps.drive-sdk");

      try {
        file = service.files().insert(file).execute();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }


      // Print the new file ID.
      System.out.println("File ID: %s" + file.getId());
    }

例外情况是：

com.google.api.client.googleapis.json.GoogleJsonResponseException: 403 Forbidden

{
  "code" : 403,
  "errors" : [ {
  "domain" : "global",
  "message" : "Insufficient Permission",
  "reason" : "insufficientPermissions"
  } ],
 "message" : "Insufficient Permission"
}

文件ID：在com.google.api.client.googleapis.json.GoogleJsonResponseException.from（GoogleJsonResponseException.java:145）在com.google.api.client.googleapis.services.json.AbstractGoogleJsonClientRequest.newExceptionOnError（AbstractGoogleJsonClientRequest.java％snull的：113）在com.google.api.client.googleapis.services.json.AbstractGoogleJsonClientRequest.newExceptionOnError（AbstractGoogleJsonClientRequest.java:40）在com.google.api.client.googleapis.services.AbstractGoogleClientRequest $ 1.interceptResponse（AbstractGoogleClientRequest.java： 321）com.google.api.client.http.HttpRequest.execute（HttpRequest.java:1056）com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed（AbstractGoogleClientRequest.java:419）com.google位于com.t的com.google.api.client.googleapis.services.AbstractGoogleClientRequest.execute(GreeGoogleClientRequest.java:469）上的.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed（AbstractGoogleClientRequest.java:352） eamchat.google.sheet.integration.DriveQuickstart.insertFile（DriveQuickstart.java:137）位于com.teamchat.google.sheet.integration.DriveQuickstart.main（DriveQuickstart.java:110）

这只是一个简单的Java项目并使用OAuth .

所以我能够获取文件列表，但无法在谷歌驱动器中插入文件 . 有人能告诉我我做错了什么 .