java - 带有服务帐户的 Google 电子表格

Question

我想使用 Java Google 电子表格 API 访问 Google 云端硬盘上的电子表格。以前我使用客户端登录方法来登录，但现在这种方法已被弃用。现在，我尝试使用服务帐户进行身份验证，而无需与用户交互，因为该工具在后台运行，我需要自动化。但我无法让它工作。这些是我现在的代码。

    List<String> SCOPES_ARRAY = Arrays.asList(
            "https://www.googleapis.com/auth/drive.file",
            "https://www.googleapis.com/auth/userinfo.email",
            "https://www.googleapis.com/auth/userinfo.profile",
            "https://docs.google.com/feeds",
            "https://spreadsheets.google.com/feeds");
    credential = new GoogleCredential.Builder()
                .setTransport(transport)
                .setJsonFactory(jsonFactory)
                .setServiceAccountId(
                        "xxxxxx@developer.gserviceaccount.com")
                .setServiceAccountScopes(SCOPES_ARRAY)
                .setServiceAccountPrivateKeyFromP12File(p12)
                .setServiceAccountUser("me@gmail.com")
                .build();
    service = new SpreadsheetService("MonitorV3");
    service.setOAuth2Credentials(credential);

    SPREADSHEET_FEED_URL = new URL("https://spreadsheets.google.com/feeds/spreadsheets/private/full");

    worksheetFeed = service.getFeed(spreadsheet.getWorksheetFeedUrl(),
                    WorksheetFeed.class);

但是在执行最后一行时我遇到了空指针异常。刷新 token 出了问题。有人看到我做错了什么吗？

我制作了一个独立的简单应用程序，现在我收到以下详细错误:

Exception in thread "main" com.google.gdata.util.AuthenticationException: Failed to refresh access token: 401 Unauthorized
at com.google.gdata.client.GoogleAuthTokenFactory$OAuth2Token.refreshToken(GoogleAuthTokenFactory.java:260)
at com.google.gdata.client.GoogleAuthTokenFactory.handleSessionExpiredException(GoogleAuthTokenFactory.java:702)
at com.google.gdata.client.GoogleService.handleSessionExpiredException(GoogleService.java:738)
at com.google.gdata.client.GoogleService.getFeed(GoogleService.java:649)
at com.google.gdata.client.Service.getFeed(Service.java:1017)
at JavaApplication20.printDocuments(JavaApplication20.java:50)
at main.main(main.java:35)

Answer 1

GoogleCredential 目前已弃用。相反，如果您需要使用服务帐户访问 Google 表格，请使用 Google OAuth2 library .

使用示例:

// A few common declarations:
private static final String APPLICATION_NAME = "My Google Sheets Application";
private static final JsonFactory JSON_FACTORY = JacksonFactory.getDefaultInstance();
private static final List<String> SCOPES = Collections.singletonList(SheetsScopes.SPREADSHEETS_READONLY);

// Initializing the service:
final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
GoogleCredentials googleCredentials;
try(InputStream inputSteam = <YOURCLASS>.class.getResourceAsStream("/path/to/credentials/file.json")) {
  googleCredentials = GoogleCredentials.fromStream(credentialsStream).createScoped(SCOPES)
}
Sheets service = Sheets.Builder(HTTP_TRANSPORT, JSON_FACTORY, new HttpCredentialsAdapter(googleCredentials))
            .setApplicationName(APPLICATION_NAME)
            .build()