【发布时间】：2018-04-22 18:13:10
【问题描述】：
我的 DriveQuickstart.java 中的代码如下所示：
import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp;
import com.google.api.client.extensions.jetty.auth.oauth2.LocalServerReceiver;
import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow;
import com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets;
import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.client.util.store.FileDataStoreFactory;
import com.google.api.services.drive.Drive;
import com.google.api.services.drive.DriveScopes;
import com.google.api.services.drive.model.File;
import com.google.api.services.drive.model.FileList;
import com.google.api.client.http.FileContent;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.security.GeneralSecurityException;
import java.util.Collections;
import java.util.List;
public class DriveQuickstart {
private static final String APPLICATION_NAME = "Google Drive API Java Quickstart";
private static final JsonFactory JSON_FACTORY = JacksonFactory.getDefaultInstance();
private static final String CREDENTIALS_FOLDER = "credentials"; // Directory to store user credentials.
/**
* 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(DriveScopes.DRIVE_METADATA_READONLY);
private static final String CLIENT_SECRET_DIR = "client_secret.json";
/**
* Creates an authorized Credential object.
* @param HTTP_TRANSPORT The network HTTP Transport.
* @return An authorized Credential object.
* @throws IOException If there is no client_secret.
*/
private static Credential getCredentials(final NetHttpTransport HTTP_TRANSPORT) throws IOException {
// Load client secrets.
InputStream in = DriveQuickstart.class.getResourceAsStream(CLIENT_SECRET_DIR);
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(CREDENTIALS_FOLDER)))
.setAccessType("offline")
.build();
return new AuthorizationCodeInstalledApp(flow, new LocalServerReceiver()).authorize("user");
}
public static void main(String... args) throws IOException, GeneralSecurityException {
// Build a new authorized API client service.
final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
Drive service = new Drive.Builder(HTTP_TRANSPORT, JSON_FACTORY, getCredentials(HTTP_TRANSPORT))
.setApplicationName(APPLICATION_NAME)
.build();
// Print the names and IDs for up to 10 files.
// FileList result = service.files().list()
// .setPageSize(10)
// .setFields("nextPageToken, files(id, name)")
// .execute();
// List<File> files = result.getFiles();
// if (files == null || files.isEmpty()) {
// System.out.println("No files found.");
// } else {
// System.out.println("Files:");
// for (File file : files) {
// System.out.printf("%s (%s)\n", file.getName(), file.getId());
// }
// }
//List all the Google Docs files
// String pageToken = null;
// do {
// FileList result = service.files().list()
// .setQ("mimeType='application/vnd.google-apps.document'")
// .setSpaces("drive")
// .setFields("nextPageToken, files(id, name)")
// .setPageToken(pageToken)
// .execute();
// for (File file : result.getFiles()) {
// System.out.printf("Found file: %s (%s)\n",
// file.getName(), file.getId());
// }
// pageToken = result.getNextPageToken();
// } while (pageToken != null);
File fileMetadata = new File();
fileMetadata.setName("photo.jpg");
java.io.File filePath = new java.io.File("files/photo.jpg");
FileContent mediaContent = new FileContent("image/jpeg", filePath);
File file = service.files().create(fileMetadata, mediaContent)
.setFields("id")
.execute();
System.out.println("File ID: " + file.getId());
}
}
我修改了 Google Drive API 快速入门代码，并从 API 文档的“上传文件”部分添加了一些 Java 代码。我按原样复制了代码，但在 IDE 的控制台中出现以下错误：
Apr 22, 2018 11:18:25 PM com.google.api.client.util.store.FileDataStoreFactory setPermissionsToOwnerOnly
WARNING: unable to change permissions for everybody: C:\Tutorial\Java\google-api\credentials
Apr 22, 2018 11:18:25 PM com.google.api.client.util.store.FileDataStoreFactory setPermissionsToOwnerOnly
WARNING: unable to change permissions for owner: C:\Tutorial\Java\google-api\credentials
Exception in thread "main" com.google.api.client.googleapis.json.GoogleJsonResponseException: 403 Forbidden
{
"code" : 403,
"errors" : [ {
"domain" : "global",
"message" : "Insufficient Permission",
"reason" : "insufficientPermissions"
} ],
"message" : "Insufficient Permission"
}
at com.google.api.client.googleapis.json.GoogleJsonResponseException.from(GoogleJsonResponseException.java:146)
at com.google.api.client.googleapis.services.json.AbstractGoogleJsonClientRequest.newExceptionOnError(AbstractGoogleJsonClientRequest.java:113)
at com.google.api.client.googleapis.services.json.AbstractGoogleJsonClientRequest.newExceptionOnError(AbstractGoogleJsonClientRequest.java:40)
at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:432)
at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:352)
at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.execute(AbstractGoogleClientRequest.java:469)
at DriveQuickstart.main(DriveQuickstart.java:100)
我无法在其他任何地方找到解决我的特定问题的方法，而且我发现的那些方法对我不起作用。我尝试使用 Java 查找一些 Youtube 视频来完成此上传任务，但没有找到。如何解决此问题并让我的程序上传文件？
谁能给我完成这项任务的 Java 代码，以便我分析它并将其用作我进一步编码任务的参考？
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标签： java google-drive-api