GoogleドライブからGoogleのコードを使用してGoogleシートをダウンロードできません

Question

GoogleドライブからGoogleシートをダウンロードできません。 404問題に直面しています。

下記のコードを確認してください。

public class Quickstart { 

     /** Application name. */ 
     private static final String APPLICATION_NAME = "Drive API Java Quickstart"; 

     /** Directory to store user credentials for this application. */ 
     private static final java.io.File DATA_STORE_DIR = new java.io.File(System.getProperty("user.home"), 
       ".credentials/drive-java-quickstart"); 

     /** Global instance of the {@link FileDataStoreFactory}. */ 
     private static FileDataStoreFactory DATA_STORE_FACTORY; 

     /** Global instance of the JSON factory. */ 
     private static final JsonFactory JSON_FACTORY = JacksonFactory.getDefaultInstance(); 

     /** Global instance of the HTTP transport. */ 
     private static HttpTransport HTTP_TRANSPORT; 

     /** 
     * Global instance of the scopes required by this quickstart. 
     * 
     * If modifying these scopes, delete your previously saved credentials at 
     * ~/.credentials/drive-java-quickstart 
     */ 
     private static final List<String> SCOPES = Arrays.asList(DriveScopes.DRIVE_METADATA_READONLY); 

     static { 
      try { 
       HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport(); 
       DATA_STORE_FACTORY = new FileDataStoreFactory(DATA_STORE_DIR); 
      } catch (Throwable t) { 
       t.printStackTrace(); 
       System.exit(1); 
      } 
     } 

     /** 
     * Creates an authorized Credential object. 
     * 
     * @return an authorized Credential object. 
     * @throws IOException 
     */ 
     public static Credential authorize() throws IOException { 
      // Load client secrets. 
      InputStream in = Quickstart.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; 
     } 

     /** 
     * Build and return an authorized Drive client service. 
     * 
     * @return an authorized Drive client service 
     * @throws IOException 
     */ 
     public static Drive getDriveService() throws IOException { 
      Credential credential = authorize(); 
      return new Drive.Builder(HTTP_TRANSPORT, JSON_FACTORY, credential).setApplicationName(APPLICATION_NAME).build(); 
     } 

     public static void main(String[] args) throws IOException { 
      // Build a new authorized API client service. 
      Drive service = getDriveService(); 

      // Print the names and IDs for up to 10 files. 
      FileList result = service.files().list().setPageSize(10).setFields("nextPageToken, files(id, name)").execute(); 
      List<File> files = result.getFiles(); 
      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.getName(), file.getId()); 
       } 
      } 
      downloadFile(service, "1l0dX1hOdk0xX5T2ruqnci-75sMwziwiih9BFGX6DcdA"); 
     } 

     private static void downloadFile(Drive service, String fileId) { 

      try { 
       File file = service.files().get(fileId).execute(); 

       System.out.println("Title: " + file.getName()); 
       System.out.println("Description: " + file.getDescription()); 
       System.out.println("MIME type: " + file.getMimeType()); 
       OutputStream outputStream = new ByteArrayOutputStream(); 
       service.files().export(fileId, "application/x-vnd.oasis.opendocument.spreadsheet") 
         .executeMediaAndDownloadTo(outputStream); 
      } catch (IOException e) { 
       System.out.println("An error occurred: " + e); 
      } 
     } 

    } 


    **Output:** 

上記のコードを実行するとエラーが表示されます。上記のコードの出力を確認してください。

Credentials saved to /home/nikhil/.credentials/drive-java-quickstart 
Files: 

nikhil (1zNmRFWe_HABvhP_HukQIcOVdUoLllKB49RpPK3_XXn4) 

Test Sheet (1l0dX1hOdk0xX5T2ruqnci-75sMwziwiih9BFGX6DcdA) 

Getting started (0Bx8dATp9NaeXc3RhcnRlcl9maWxlX2Rhc2hlclYw) 

Title: Test Sheet 

Description: null 

MIME type: application/vnd.google-apps.spreadsheet 

An error occurred: com.google.api.client.http.HttpResponseException: 403 

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

Answer 1

変更スコープとデータストアディレクトリ。

追加ファイルをローカルマシンに保存するためのファイルパス。

public static void initialMethod() throws IOException { 
     // Build a new authorized API client service. 
     Drive service = getDriveService(); 
     downloadFile(service, "1JYlTtznsCll16upwIIbgXjqDvjsAFO5krSiGjvciO70"); 
    } 


private static void downloadFile(Drive service, String fileId) { 

     try { 
      File file = service.files().get(fileId).execute(); 
      System.out.println("Title: " + file.getName()); 
      System.out.println("Description: " + file.getDescription()); 
      System.out.println("MIME type: " + file.getMimeType()); 
      OutputStream outputStream = new FileOutputStream(new java.io.File(Constant.DRIVE_EXCEL_PATH + "Test.xlsx")); 
      service.files().export(fileId, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet") 
        .executeMediaAndDownloadTo(outputStream); 
      System.out.println(outputStream); 
     } catch (IOException e) { 
      System.out.println("An error occurred: " + e); 
     } catch (Exception e) { 
      System.out.println("An error occurred: " + e); 
     } 
    } 

上記のコードは、Googleドライブからファイルをダウンロードするのに役立ちます。