在 Google 驱动器中使用 Google 电子表格 API 在 Java 中创建电子表格

Question

我创建了一些工具来填充 google 电子表格。它工作了 1 年，从今天开始我有错误

Exception in thread "main" com.google.gdata.util.AuthenticationException: Error authenticating (check service name)
at com.google.gdata.client.GoogleAuthTokenFactory.getAuthException(GoogleAuthTokenFactory.java:688)
at com.google.gdata.client.GoogleAuthTokenFactory.getAuthToken(GoogleAuthTokenFactory.java:560)
at com.google.gdata.client.GoogleAuthTokenFactory.setUserCredentials(GoogleAuthTokenFactory.java:397)
at com.google.gdata.client.GoogleService.setUserCredentials(GoogleService.java:364)
at com.google.gdata.client.GoogleService.setUserCredentials(GoogleService.java:319)
at com.google.gdata.client.GoogleService.setUserCredentials(GoogleService.java:303)

这是连接gmail的部分代码：

String USERNAME = "usename@........com"; ->of course I'm using proper username and password
    String PASSWORD = "*******";
    SpreadsheetService service
            = new SpreadsheetService("SandboxCheck");
    service.setUserCredentials(USERNAME, PASSWORD);

我不知道如何连接 gmail，我试图通过 oAuth 连接，但我不知道如何连接。在 https://developers.google.com/google-apps/spreadsheets/authorize 上的示例中，只有 .net 的代码。

Answer 1

Google 刚刚停止支持 OAuth1.0。需要使用 OAuth2。要切换，首先转到 Google Developer Console，创建一个项目并设置一个凭据。然后更新您的代码，类似于以下 Java 代码：

private void createSpreadSheetService() throws GeneralSecurityException, IOException, ServiceException {
   HttpTransport httpTransport = new NetHttpTransport();
   JacksonFactory jsonFactory = new JacksonFactory();
   String [] SCOPESArray= {"https://spreadsheets.google.com/feeds", "https://docs.google.com/feeds"};
   final List SCOPES = Arrays.asList(SCOPESArray);
   GoogleCredential credential = new GoogleCredential.Builder()
     .setTransport(httpTransport)
     .setJsonFactory(jsonFactory)
     .setServiceAccountId(SERVICE_ACCOUNT_EMAIL)
     .setServiceAccountScopes(SCOPES)
     .setServiceAccountPrivateKeyFromP12File(SERVICE_ACCOUNT_PKCS12_FILE)
     .build();

   SPREADSHEETSERVICE = new SpreadsheetService("data");
   SPREADSHEETSERVICE.setOAuth2Credentials(credential);

}

您需要两个库：google-api-client 和 google-http-client-jackson。如果你使用 Maven，在 pom.xml.

中包括以下依赖项

 <dependency>
  <groupId>com.google.api-client</groupId>
  <artifactId>google-api-client</artifactId>
  <version>1.19.0</version>
  <type>jar</type>
 </dependency>
 <dependency>
  <groupId>com.google.http-client</groupId>
  <artifactId>google-http-client-jackson</artifactId>
  <version>1.19.0</version>
  <type>jar</type>
 </dependency>

Answer 2

我试过 Gao 的解决方案，但我有一个关于库的问题。我正在使用 netbeans，该项目正在构建而没有错误，但是当我尝试执行它时出现此错误：

 Exception in thread "main" java.lang.NoClassDefFoundError: org/codehaus/jackson/JsonFactory
at com.google.api.client.json.jackson.JacksonFactory.<init>(JacksonFactory.java:38)
at SandboxCheck.main(SandboxCheck.java:48)

我发现 classpath 有问题，但我不知道如何在 netbeans 上修复它，我认为它会在添加库时自动修复。我添加了

google-oauth-client-1.16.0-rc.jar google-oauth-client-1.16.0-rc-sources.jar google-api-client-1.8.0-beta-sources.jar google-api-client-1.4.1-beta.jar google-api-client-1.19.1.jar

我不确定我是否添加了太多这个库，但如果我删除了，例如。 google-api-client-1.4.1-beta.jar 它不会看到 JacksonFactory class.

Answer 3

我终于在 from here 的帮助下成功创建了这样的连接。一切都像以前一样工作。您需要做的步骤是：

在 https://console.developers.google.com
创建新项目
在 APIs & Auth -> Credential -> Create New Client ID for Service Account
生成客户端 ID 时您必须生成 P12 密钥。
下面的代码中需要客户端 ID，电子邮件地址是您必须共享电子表格的地址

下面是工作代码

import com.google.api.client.googleapis.auth.oauth2.GoogleCredential;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.jackson.JacksonFactory;
import com.google.gdata.client.spreadsheet.SpreadsheetService;
import com.google.gdata.data.spreadsheet.SpreadsheetEntry;
import com.google.gdata.data.spreadsheet.SpreadsheetFeed;
import com.google.gdata.util.ServiceException;
import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.security.GeneralSecurityException;
import java.util.Arrays;
import java.util.List;
public class OAuthIntegration{
    public static void main(String[] args) throws MalformedURLException, GeneralSecurityException, IOException, ServiceException {
        URL SPREADSHEET_FEED_URL;
        SPREADSHEET_FEED_URL = new URL("https://spreadsheets.google.com/feeds/spreadsheets/private/full");

        File p12 = new File("./key.p12");

        HttpTransport httpTransport = new NetHttpTransport();
        JacksonFactory jsonFactory = new JacksonFactory();
        String[] SCOPESArray = {"https://spreadsheets.google.com/feeds", "https://spreadsheets.google.com/feeds/spreadsheets/private/full", "https://docs.google.com/feeds"};
        final List SCOPES = Arrays.asList(SCOPESArray);
        GoogleCredential credential = new GoogleCredential.Builder()
                .setTransport(httpTransport)
                .setJsonFactory(jsonFactory)
                .setServiceAccountId("cliend_ID")
                .setServiceAccountScopes(SCOPES)
                .setServiceAccountPrivateKeyFromP12File(p12)
                .build();

        SpreadsheetService service = new SpreadsheetService("Test");

        service.setOAuth2Credentials(credential);
        SpreadsheetFeed feed = service.getFeed(SPREADSHEET_FEED_URL, SpreadsheetFeed.class);
        List<SpreadsheetEntry> spreadsheets = feed.getEntries();

        if (spreadsheets.size() == 0) {
            System.out.println("No spreadsheets found.");
        }

         SpreadsheetEntry spreadsheet = null;
        for (int i = 0; i < spreadsheets.size(); i++) {
            if (spreadsheets.get(i).getTitle().getPlainText().startsWith("ListOfSandboxes")) {
                spreadsheet = spreadsheets.get(i);
                System.out.println("Name of editing spreadsheet: " + spreadsheets.get(i).getTitle().getPlainText());
                System.out.println("ID of SpreadSheet: " + i);
            }
        }

    }

}

我希望这对我遇到的问题有所帮助。这是我用过的 jar 列表：

guava-11.0.2.jar
gdata-spreadsheet-3.0.jar
gdata-maps-2.0.jar
gdata-core-1.0.jar
jackson-core-asl-1.9.11.jar
jackson-core-2.1.3.jar
google-oauth-client-1.20.0.jar
google-http-client-jackson2-1.20.0.jar
google-http-client-jackson-1.20.0.jar
google-http-client-1.20.0.jar
google-api-client-1.20.0.jar

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