GAE Blob Store 获取文件大小

Question

我尝试从 Java 中的 Google App Engine 获取存储在 Google Cloud Storage 中的文件的大小，

我试过了：

FileService fileService = FileServiceFactory.getFileService();
AppEngineFile appEngineFile = fileService.getBlobFile(new BlobKey("blob key"));
int size = (int) fileService.stat(appEngineFile).getLength().longValue();

但它返回 0

Answer 1

你必须使用BlobInfo.getSize():

BlobInfoFactory blobInfoFactory = new BlobInfoFactory();
BlobInfo blobInfo = blobInfoFactory.loadBlobInfo(new BlobKey("blob key"))
Long blobSize = blobInfo.getSize();