谷歌的OAuth2阿比的Java /月食

Question

我期待在[这个例子] https://developers.google.com/admin-sdk/directory/v1/quickstart/quickstart-java）。

但我不希望使用URL复制/粘贴版本的权威性，所以我读过，我应该使用serviceaccount。

我下载了P12键并把它放在我的源文件夹。我正与一些代码，我就发现stackoverflow重建谷歌例

因此，这里是我走多远：

public class DirectoryCommandLine {

    HttpTransport httpTransport = new NetHttpTransport();
  JacksonFactory jsonFactory = new JacksonFactory();

    // Build service account credential.
    GoogleCredential credential = new GoogleCredential.Builder().setTransport(httpTransport)
        .setJsonFactory(jsonFactory)
        .setServiceAccountId("[email protected]")
        .setServiceAccountScopes(DirectoryScopes.all())
       .setServiceAccountPrivateKeyFromP12File(new java.io.File("eclipsejava-d6675et3ab71.p12"))
        .build();


    // Create a new authorized API client
    Directory service = new Directory.Builder(httpTransport, jsonFactory, credential)
        .setApplicationName("DirectoryCommandLine")
        .build();

    List<User> allUsers = new ArrayList<User>();
    Directory.Users.List request = service.users().list().setCustomer("my_customer");

    // Get all users
    do {
      try {
        Users currentPage = request.execute();
        allUsers.addAll(currentPage.getUsers());
        request.setPageToken(currentPage.getNextPageToken());
      } catch (IOException e) {
        System.out.println("An error occurred: " + e);
        request.setPageToken(null);
      }
    } while (request.getPageToken() != null &&
             request.getPageToken().length() > 0 );

    // Print all users
    for (User currentUser : allUsers) {
      System.out.println(currentUser.getPrimaryEmail());
    }
  }
}

如果我运行此我得到这个错误：

Error: Main method not found in class DirectoryCommandLine, please define the main method as:
   public static void main(String[] args)

我想我需要添加

public static void main(String[] args) throws IOException {

盈方/前：

  HttpTransport httpTransport = new NetHttpTransport();
  JacksonFactory jsonFactory = new JacksonFactory();

但后来这一切得到一个烂摊子：

Answer 1

这无关与谷歌的API，但Java类结构。考虑到你是在Java初学者，你应该更简单的练习开始。

Oracle和互联网提供了大量有关Java文档。你可以开始寻找这些链接，例如：https://docs.oracle.com/javase/tutorial/getStarted/application/ https://docs.oracle.com/javase/tutorial/java/javaOO/classes.html