无法从谷歌硬盘下载谷歌表。面对403不足的许可问题。
请检查以下代码。
public class Quickstart {
/** Application name. */
private static final String APPLICATION_NAME = "Drive API Java Quickstart";
/** Directory to store user credentials for this application. */
private static final java.io.File DATA_STORE_DIR = new java.io.File(System.getProperty("user.home"),
".credentials/drive-java-quickstart");
/** Global instance of the {@link FileDataStoreFactory}. */
private static FileDataStoreFactory DATA_STORE_FACTORY;
/** Global instance of the JSON factory. */
private static final JsonFactory JSON_FACTORY = JacksonFactory.getDefaultInstance();
/** Global instance of the HTTP transport. */
private static HttpTransport HTTP_TRANSPORT;
/**
* Global instance of the scopes required by this quickstart.
*
* If modifying these scopes, delete your previously saved credentials at
* ~/.credentials/drive-java-quickstart
*/
private static final List<String> SCOPES = Arrays.asList(DriveScopes.DRIVE_METADATA_READONLY);
static {
try {
HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
DATA_STORE_FACTORY = new FileDataStoreFactory(DATA_STORE_DIR);
} catch (Throwable t) {
t.printStackTrace();
System.exit(1);
}
}
/**
* Creates an authorized Credential object.
*
* @return an authorized Credential object.
* @throws IOException
*/
public static Credential authorize() throws IOException {
// Load client secrets.
InputStream in = Quickstart.class.getResourceAsStream("/client_secret.json");
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(DATA_STORE_FACTORY).setAccessType("offline").build();
Credential credential = new AuthorizationCodeInstalledApp(flow, new LocalServerReceiver()).authorize("user");
System.out.println("Credentials saved to " + DATA_STORE_DIR.getAbsolutePath());
return credential;
}
/**
* Build and return an authorized Drive client service.
*
* @return an authorized Drive client service
* @throws IOException
*/
public static Drive getDriveService() throws IOException {
Credential credential = authorize();
return new Drive.Builder(HTTP_TRANSPORT, JSON_FACTORY, credential).setApplicationName(APPLICATION_NAME).build();
}
public static void main(String[] args) throws IOException {
// Build a new authorized API client service.
Drive service = getDriveService();
// 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.size() == 0) {
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());
}
}
downloadFile(service, "1l0dX1hOdk0xX5T2ruqnci-75sMwziwiih9BFGX6DcdA");
}
private static void downloadFile(Drive service, String fileId) {
try {
File file = service.files().get(fileId).execute();
System.out.println("Title: " + file.getName());
System.out.println("Description: " + file.getDescription());
System.out.println("MIME type: " + file.getMimeType());
OutputStream outputStream = new ByteArrayOutputStream();
service.files().export(fileId, "application/x-vnd.oasis.opendocument.spreadsheet")
.executeMediaAndDownloadTo(outputStream);
} catch (IOException e) {
System.out.println("An error occurred: " + e);
}
}
}
**Output:**
Credentials saved to /home/nikhil/.credentials/drive-java-quickstart
Files:
nikhil (1zNmRFWe_HABvhP_HukQIcOVdUoLllKB49RpPK3_XXn4)
Test Sheet (1l0dX1hOdk0xX5T2ruqnci-75sMwziwiih9BFGX6DcdA)
Getting started (0Bx8dATp9NaeXc3RhcnRlcl9maWxlX2Rhc2hlclYw)
Title: Test Sheet
Description: null
MIME type: application/vnd.google-apps.spreadsheet
An error occurred: com.google.api.client.http.HttpResponseException: 403
Forbidden
{
"error": {
"errors": [
{
"domain": "global",
"reason": "insufficientPermissions",
"message": "Insufficient Permission"
}
],
"code": 403,
"message": "Insufficient Permission"
}
}
答案 0 :(得分：1)
更改范围和数据存储目录。
private static final List<String> SCOPES = Arrays.asList(DriveScopes.DRIVE);
private static final java.io.File DATA_STORE_DIR = new java.io.File(System.getProperty("user.home"),
".credentials/drive-java-quickstart.json");
添加了将文件保存到本地计算机的文件路径。
public static void initialMethod() throws IOException {
// Build a new authorized API client service.
Drive service = getDriveService();
downloadFile(service, "1JYlTtznsCll16upwIIbgXjqDvjsAFO5krSiGjvciO70");
}
private static void downloadFile(Drive service, String fileId) {
try {
File file = service.files().get(fileId).execute();
System.out.println("Title: " + file.getName());
System.out.println("Description: " + file.getDescription());
System.out.println("MIME type: " + file.getMimeType());
OutputStream outputStream = new FileOutputStream(new java.io.File(Constant.DRIVE_EXCEL_PATH + "Test.xlsx"));
service.files().export(fileId, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet")
.executeMediaAndDownloadTo(outputStream);
System.out.println(outputStream);
} catch (IOException e) {
System.out.println("An error occurred: " + e);
} catch (Exception e) {
System.out.println("An error occurred: " + e);
}
}
以上代码有助于从Google云端硬盘下载文件。