Gmail API Java中{[e-mail]>的授权被拒绝

如何解决Gmail API Java中{[e-mail]>的授权被拒绝

我正在使用Gmail API Java从a specific account of my company向用户发送邮件。还为该帐户存储了StoredCredential文件/令牌。但是如here所述，使用“我”对我不起作用。 代码：

//set the Mimemessage
            MimeMessage email = new MimeMessage(session);
            email.setFrom(new InternetAddress("me"));                  //from
            email.addRecipient(javax.mail.Message.RecipientType.TO,new InternetAddress(to));                                  //to 

//sending mail
            Message message = createMessage(email);
            message = service.users().messages().send(userId,message).execute();

这说：

message: Delegation denied for [e-mail]

据我了解，如果我拥有上述令牌和所需权限，我应该能够发送邮件，对吗？

此外，当我将“从”设置为公司帐户的邮件地址而不是“我”时，错误仍然存​​在。

我该如何克服？任何解决方法？ 谢谢。

编辑

实际上，我使用4个Google API（Google表格，云端硬盘，Gmail和Script API），并且使用了一次oAuth检查。

代码：

凭据

final String TOKENS_DIRECTORY_PATH = "mydirectory\\tokens";
final List<String> SCOPES = Arrays.asList(SheetsScopes.SPREADSHEETS,DriveScopes.DRIVE,DriveScopes.DRIVE_FILE,DriveScopes.DRIVE_METADATA,GmailScopes.GMAIL_COMPOSE,GmailScopes.GMAIL_SEND,GmailScopes.GMAIL_LABELS,ScriptScopes.MAIL_GOOGLE_COM);

        final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();

        // build GoogleClientSecrets from JSON file
        final String CREDENTIALS_FILE_PATH = "/credentials.json";

//       Load client secrets.
         InputStream in = GoogleAuthorizeUtil.class.getResourceAsStream(CREDENTIALS_FILE_PATH);

         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(new FileDataStoreFactory(new java.io.File(TOKENS_DIRECTORY_PATH)))
                 .setAccessType("offline")
                 .build();
         LocalServerReceiver receiver = new LocalServerReceiver.Builder().setPort(8888).build();
         
        // build Credential object
        Credential credential =  new AuthorizationCodeInstalledApp(flow,receiver).authorize("user");
        
        return credential;

上述代码返回了Google凭据对象。 下一步是分别为每个API创建服务：

创建服务

    public static Gmail getGMailService() throws IOException,GeneralSecurityException {
        Credential credential = GoogleAuthorizeUtil.authorize();
        return new Gmail.Builder(
          GoogleNetHttpTransport.newTrustedTransport(),JacksonFactory.getDefaultInstance(),credential)
          .setApplicationName(APPLICATION_NAME)
          .build();
    } 
    public static Gmail setup() throws GeneralSecurityException,IOException {
        Gmail gmailService;
        gmailService = getGMailService();
        return gmailService;
    }

以上返回Gmail服务（所有四个API的服务都执行了类似的代码）。

现在使用此服务发送邮件：

使用服务对象发送邮件

Gmail gservice = setup(); //returns Gmail service
// finally using the mail service---------------------
Properties props = new Properties();
            Session session = Session.getDefaultInstance(props,null);
            String user = "me";
            MimeMessage email = new MimeMessage(session);
            
            email.setFrom(new InternetAddress(user));
            email.addRecipient(javax.mail.Message.RecipientType.TO,new InternetAddress(to));
            email.setSubject(subject);
            
            MimeBodyPart mimeBodyPart = new MimeBodyPart();
            mimeBodyPart.setContent(bodyText,"text/html");
            
            Multipart multipart = new MimeMultipart();
            multipart.addBodyPart(mimeBodyPart);
            
            email.setContent(multipart);
            
            
            Message message = createMessage(email);
            message = service.users().messages().send(userId,message).execute();

当我单击submit按钮时，所有这些都在servlet中调用。

这应该给出有关此问题的想法，但是请务必告知是否需要更多信息/代码。

谢谢。