2 回答
TA贡献1817条经验 获得超14个赞
最后我想出了这个代码:)。工作得很好。需要凭据才能将文件上传到 GCP 存储。您也可以从 JSON 格式生成凭据。
https://cloud.google.com/docs/authentication/production
Credentials credentials = GoogleCredentials.fromStream(new FileInputStream("C:\\Users\\sachinthah\\Downloads\\MCQ project -1f959c1fc3a4.json"));
Storage storage = StorageOptions.newBuilder().setCredentials(credentials).build().getService();
public CloudStorageHelper() throws IOException {
}
@SuppressWarnings("deprecation")
@RequestMapping(method = RequestMethod.POST, value = "/imageUpload112")
public String uploadFile(@RequestParam("fileseee")MultipartFile fileStream)
throws IOException, ServletException {
String bucketName = "mcqimages";
checkFileExtension(fileStream.getName());
DateTimeFormatter dtf = DateTimeFormat.forPattern("-YYYY-MM-dd-HHmmssSSS");
DateTime dt = DateTime.now(DateTimeZone.UTC);
String dtString = dt.toString(dtf);
final String fileName = fileStream.getName() + dtString;
File file = convertMultiPartToFile( fileStream );
BlobInfo blobInfo =
storage.create(
BlobInfo
.newBuilder(bucketName, fileName)
.setAcl(new ArrayList<>(Arrays.asList(Acl.of(User.ofAllUsers(), Role.READER))))
.build()
// file.openStream()
);
System.out.println(blobInfo.getMediaLink());
return blobInfo.getMediaLink();
}
private File convertMultiPartToFile(MultipartFile file ) throws IOException
{
File convFile = new File( file.getOriginalFilename() );
FileOutputStream fos = new FileOutputStream( convFile );
fos.write( file.getBytes() );
fos.close();
return convFile;
}
private void checkFileExtension(String fileName) throws ServletException {
if (fileName != null && !fileName.isEmpty() && fileName.contains(".")) {
String[] allowedExt = {".jpg", ".jpeg", ".png", ".gif"};
for (String ext : allowedExt) {
if (fileName.endsWith(ext)) {
return;
}
}
throw new ServletException("file must be an image");
}
}
TA贡献1770条经验 获得超3个赞
我会尝试上传文件:
public String uploadFile(@RequestParam("file") MultipartFile file) {
if (file.isEmpty()) {
//Set error message
}
else {
try {
String extension = FilenameUtils.getExtension(file.getOriginalFilename()); //Commons IO
// Get the file
byte[] bytes = file.getBytes();
....
}
上传文件的一个很好的例子在这里:https : //www.baeldung.com/spring-file-upload
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