我现在无处可去。当我在 Google 上四处寻找“从 Google App Engine 将数据导出到 Google 电子表格”的示例时，我看到了很多 Google Conversion API、Google Conversion API、Google Spreadsheet API 和 Google Docs API 教程。但是当我在谷歌网站上查看时，它们都被谷歌弃用了？？？那么，现在最新的更新是什么，以便我可以使用它？
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好的，现在我通过 OAuth2 使用 Google Drive SDK 创建文本文件。但我有这个问题：
这是错误：
java.lang.NullPointerException
at java.net.URI$Parser.parse(URI.java:3004)
at java.net.URI.(URI.java:577)
at com.google.api.client.http.GenericUrl.( GenericUrl.java:100)
在 com.google.api.client.googleapis.media.MediaHttpUploader.upload(MediaHttpUploader.java:269)
在 com.google.api.services.drive.Drive$Files$Insert.executeUnparsed(Drive. java:309)
在 com.google.api.services.drive.Drive$Files$Insert.execute(Drive.java:331)
在 com.company.dashboard.service.DriveService.initDoc(DriveService.java:84)
这是代码：
private GoogleCredential buildGoogleCredential(Credential credential) {
try {
logger.warning(oauth2Service.getClientCredential().toString());
GoogleCredential googleCredential = new GoogleCredential.Builder()
.setClientSecrets(oauth2Service.getClientCredential())
.setTransport(new NetHttpTransport())
.setJsonFactory(new JacksonFactory()).build();
googleCredential.setAccessToken(credential.getAccessToken());
googleCredential.setRefreshToken(credential.getRefreshToken());
return googleCredential;
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
private Drive buildService(GoogleCredential credential) {
return new Drive.Builder(new NetHttpTransport(), new JacksonFactory(), credential).build();
}
public void initDoc(HttpServletRequest req)
throws Exception {
User user = UserServiceFactory.getUserService().getCurrentUser();
Credential credential = oauth2Service.getStoredCredential(
user.getUserId(),
(CredentialStore)req.getSession().getServletContext().getAttribute(OAuth2Constant.GOOG_CREDENTIAL_STORE));
if (credential != null) {
logger.warning("Using access token: " + credential.getAccessToken());
try {
GoogleCredential googleCredential = buildGoogleCredential(credential);
Drive service = buildService(googleCredential);
if (service == null) {
logger.warning("very bad!");
}
File body = new File();
body.setTitle("My document");
body.setDescription("A test document");
body.setMimeType("text/plain");
java.io.File fileContent = new java.io.File("document.txt");
FileContent mediaContent = new FileContent("text/plain", fileContent);
service.files().insert(body, mediaContent).execute();
//File file = service.files().insert(body, mediaContent).execute();
//System.out.println("File ID: " + file.getId());
} catch (HttpResponseException e) {
if (e.getStatusCode() == 401) {
logger.warning(e.getMessage());
// Credentials have been revoked.
// TODO: Redirect the user to the authorization URL.
throw new UnsupportedOperationException();
}
} catch (IOException e) {
System.out.println("An error occurred: " + e);
}
}
oauth2Service.getClientCredential() 返回（xxx = 客户端 ID 和客户端密码，此处未显示）
{"web":{"client_id":"xxx.apps.googleusercontent.com","client_secret":"xxx"}}
这是我的范围：
final static List<String> SCOPES = Arrays.asList("https://www.googleapis.com/auth/userinfo.profile",
"https://www.googleapis.com/auth/userinfo.email",
"https://www.googleapis.com/auth/drive",
"https://www.googleapis.com/auth/docs",
"https://www.googleapis.com/auth/drive.file");
final static String AUTH_RESOURCE_LOC = "/client_secrets.json";
final static String OATH_CALLBACK = "http://localhost:8888/oauth2callback";
这条线
service.files().insert(body, mediaContent).execute();
抛出 NullPointerException。知道出了什么问题吗？？？
P/S：凭据 = com.google.api.client.auth.oauth2.Credential。我的 OAuth2 一切正常。我可以毫无问题地检索用户信息，但不能检索 Drive API。如您所见，服务不为空，我将其记录为“非常糟糕”并且未显示。没有抛出 401 异常意味着我的 Oauth2 对范围很好。
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