java - 通过服务器读取/写入 Google 表，无需使用 OAuth

Question

尝试通过互联网和 google docs他们仅提供 OAuth 方式。有没有办法使用 API key 而不是 OAuth 读取/写入 Google 表格。

Answer 1

经过一些研究，google-oath-client 模块中的 Credential 对象可以提供帮助。从 Google 帐户下载 .p12 文件。下面是在没有 OAUth 提示的情况下读取 Google 表格的代码。这也可以用于编写或附加一些修改后的工作表:

package com.mycomp;

import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.googleapis.auth.oauth2.GoogleCredential;
import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.gson.GsonFactory;
import com.google.api.services.sheets.v4.Sheets;
import com.google.api.services.sheets.v4.SheetsScopes;
import com.google.api.services.sheets.v4.model.ValueRange;
import com.nm.vernacular.services.SpreadSheetsService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service;

import java.io.File;
import java.io.IOException;
import java.net.URISyntaxException;
import java.net.URL;
import java.security.GeneralSecurityException;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;

/**
 * Created by ankushgupta & modified for SO.
 */

public class GoogleSheetsReader {

    private static final JsonFactory JSON_FACTORY = GsonFactory.getDefaultInstance();
    private static final String KEY_FILE_LOCATION = "<Name of p12 file>.p12";
    private static final String SERVICE_ACCOUNT_EMAIL = "<email of google service account>";
    private static final String APPLICATION_NAME = "Google Sheets API";

    private static final Logger LOGGER = LoggerFactory.getLogger(GoogleSheetsReader.class);

    /**
     * Global instance of the scopes required by this quickstart.
     * If modifying these scopes, delete your previously saved credentials/ folder.
     */
    private static final List<String> SCOPES = Collections.singletonList(SheetsScopes.SPREADSHEETS);

    /**
     * Creates an authorized Credential object.
     * @return An authorized Credential object.
     * @throws IOException If there is no client_secret.
     */
    private Credential getCredentials() throws URISyntaxException, IOException, GeneralSecurityException {
        //Reading Key File
        URL fileURL = GoogleSheetsReader.class.getClassLoader().getResource(KEY_FILE_LOCATION);
        // Initializes an authorized analytics service object.
        if(fileURL==null) {
            fileURL = (new File("/resources/"+ KEY_FILE_LOCATION)).toURI().toURL();
        }
        // Construct a GoogleCredential object with the service account email
        // and p12 file downloaded from the developer console.
        HttpTransport httpTransport = GoogleNetHttpTransport.newTrustedTransport();
        return new GoogleCredential.Builder()
                .setTransport(httpTransport)
                .setJsonFactory(JSON_FACTORY)
                .setServiceAccountId(SERVICE_ACCOUNT_EMAIL)
                .setServiceAccountPrivateKeyFromP12File(new File(fileURL.toURI()))
                .setServiceAccountScopes(SCOPES)
                .build();
    }

    @Override
    public List<Object[]> readSheet(String nameAndRange, String key, int[] returnRange) throws GeneralSecurityException, IOException {
        final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
        final String spreadsheetId = key;
        final String range = nameAndRange;
        try {
            Sheets service = new Sheets.Builder(HTTP_TRANSPORT, JSON_FACTORY, getCredentials())
                    .setApplicationName(APPLICATION_NAME)
                    .build();

            ValueRange response = service.spreadsheets().values()
                    .get(spreadsheetId, range)
                    .execute();
            List<List<Object>> values = response.getValues();

            int a = returnRange.length;
            List<Object[]> result = new LinkedList<>();

            if (values == null || values.isEmpty()) {
                return Collections.emptyList();
            } else {
                for (List row : values) {
                    if(row.size() >= a) {
                        Object[] objArr = new Object[a];
                        for(int i=0;i<a;i++) {
                            objArr[i] = row.get(returnRange[i]);
                        }
                        result.add(objArr);
                    }
                }
            }
            return result;
        } catch(Exception ex) {
            LOGGER.error("Exception while reading google sheet", ex);
        } finally {

        }
        return null;
    }

    public static void main(String[] args) {
     GoogleSheetsReader reader = new GoogleSheetsReader();
     reader.readSheet("<Sheet Name>!A2:B", "<sheets key from URL>", new int[]{0, 1});
    }
}