如何用java在google drive api中初始化凭证?
我有一个JS页面,这是谷歌选择器,它可以让用户选择他的文件上传给我。之后,我可以得到一个文件Id,对于后端,我需要发出一个请求,将这个Id发送回我,对吗?如果我想下载这个文件,我可以使用下面的代码:如何用java在google drive api中初始化凭证?,java,google-drive-api,Java,Google Drive Api,我有一个JS页面,这是谷歌选择器,它可以让用户选择他的文件上传给我。之后,我可以得到一个文件Id,对于后端,我需要发出一个请求,将这个Id发送回我,对吗?如果我想下载这个文件,我可以使用下面的代码: private static InputStream downloadFile(Drive service, File file) { if (file.getDownloadUrl() != null && file.getDownloadUrl().length(
private static InputStream downloadFile(Drive service, File file) {
if (file.getDownloadUrl() != null && file.getDownloadUrl().length() > 0) {
try {
HttpResponse resp =
service.getRequestFactory().buildGetRequest(new GenericUrl(file.getDownloadUrl()))
.execute();
return resp.getContent();
} catch (IOException e) {
// An error occurred.
e.printStackTrace();
return null;
}
} else {
// The file doesn't have any content stored on Drive.
return null;
}
}
GoogleCredential credentials = new GoogleCredential.Builder()
.setClientSecrets(CLIENT_ID, CLIENT_SECRET)
.setJsonFactory(jsonFactory).setTransport(transport).build()
.setRefreshToken("<REFRESH_TOKEN>").setAccessToken("<ACCESS_TOKEN>");
在这段代码中,我需要初始化驱动器,驱动器需要凭证。代码如下:
private static InputStream downloadFile(Drive service, File file) {
if (file.getDownloadUrl() != null && file.getDownloadUrl().length() > 0) {
try {
HttpResponse resp =
service.getRequestFactory().buildGetRequest(new GenericUrl(file.getDownloadUrl()))
.execute();
return resp.getContent();
} catch (IOException e) {
// An error occurred.
e.printStackTrace();
return null;
}
} else {
// The file doesn't have any content stored on Drive.
return null;
}
}
GoogleCredential credentials = new GoogleCredential.Builder()
.setClientSecrets(CLIENT_ID, CLIENT_SECRET)
.setJsonFactory(jsonFactory).setTransport(transport).build()
.setRefreshToken("<REFRESH_TOKEN>").setAccessToken("<ACCESS_TOKEN>");
我想知道是什么,我怎样才能得到它