使用应用脚本获取价值谷歌表 - Java

Google表格是一个强大的云计算工具，可以用于管理数据、创建图表和共享信息。如果您需要以编程方式操作谷歌表格数据，您可以使用Java开发的Google应用脚本。

设置Google应用脚本开发环境

在开发Google应用脚本之前，您需要创建一个Google账户、一个Google Drive授权，并在Google开发者控制台创建一个新项目。在另外的终端中安装Java 8或更高版本。

创建一个新项目并导入Maven库

创建一个名为getting-started-java的新Maven项目，并更新pom.xml文件以包含以下依赖项。

<dependencies>
  <dependency>
    <groupId>com.google.apis</groupId>
    <artifactId>google-api-services-sheets</artifactId>
    <version>v4-rev493-1.23.0</version>
  </dependency>
  <dependency>
    <groupId>com.google.oauth-client</groupId>
    <artifactId>google-oauth-client-jetty</artifactId>
    <version>1.25.0</version>
  </dependency>
</dependencies>

授权Google API服务和Sheets API

在Google开发者控制台中启用Google API服务和Sheets API。然后从github下载客户端ID和应用程序密钥，将它们存储在本地计算机上的任何适当的位置。

public class SheetsQuickstart {
    private static final String APPLICATION_NAME = "Google Sheets API Java Quickstart";
    private static final JsonFactory JSON_FACTORY = com.google.api.client.json.jackson2.JacksonFactory.getDefaultInstance();
    private static final String TOKENS_DIRECTORY_PATH = "tokens";

    /**
     * Global instance of the scopes required by this quickstart.
     * If modifying these scopes, delete your previously saved tokens/ folder.
     */
    private static final List<String> SCOPES = Collections.singletonList(SheetsScopes.SPREADSHEETS_READONLY);
    private static final String CREDENTIALS_FILE_PATH = "/credentials.json";
    private static final String SPREADSHEET_ID = "<your-spreadsheet-id>";

    /**
     * Creates an authorized Credential object.
     * @param httpTransport The network HTTP Transport.
     * @return An authorized Credential object.
     * @throws IOException If the credentials.json file cannot be found.
     */
    private static Credential getCredentials(final NetHttpTransport httpTransport) throws IOException {
        // Load client secrets.
        InputStream in = SheetsQuickstart.class.getResourceAsStream(CREDENTIALS_FILE_PATH);
        if (in == null) {
            throw new FileNotFoundException("Resource not found: " + CREDENTIALS_FILE_PATH);
        }
        GoogleClientSecrets clientSecrets = GoogleClientSecrets.load(JSON_FACTORY, new InputStreamReader(in));

        // Build flow and trigger user authorization request.
        GoogleAuthorizationCodeFlow flow = new GoogleAuthorizationCodeFlow.Builder(
                httpTransport, 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();
        return new AuthorizationCodeInstalledApp(flow, receiver).authorize("user");
    }

    public static void main(String[] args) throws IOException, GeneralSecurityException {
        // Build a new authorized API client service.
        final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
        Sheets service = new Sheets.Builder(HTTP_TRANSPORT, JSON_FACTORY, getCredentials(HTTP_TRANSPORT))
                .setApplicationName(APPLICATION_NAME)
                .build();

        // Prints the name and values of every column.
        String range = "Sheet1!A1:Z";
        ValueRange response = service.spreadsheets().values()
                .get(SPREADSHEET_ID, range)
                .execute();
        List<List<Object>> values = response.getValues();
        if(values == null || values.isEmpty()) {
            System.out.println("No data found.");
        } else {
            System.out.println("Name, Major");
            for(List row: values) {
                // Print columns A and B, which correspond to indices 0 and 1.
                System.out.printf("%s, %s\n", row.get(0), row.get(1));
            }
        }
    }
}

运行应用程序

您现在可以运行您的Java应用程序，从谷歌表格（例如<your-spreadsheet-id>）中检索数据并将其显示在控制台上。

在项目根目录下运行以下命令行：

mvn compile exec:java -Dexec.mainClass=com.example.sheets.SheetsQuickstart

现在，您已经成功地创建了一个Java项目，其中包括使用Google应用脚本获取价值谷歌表的代码。