在Java和Azure Blob存儲SDK中上載帶有子目錄的目錄

Question

我使用此代碼將文件上傳到azure blob存儲，但是當我嘗試使用子目錄加載目錄時，出現錯誤“遇到FileNotFoundException：C：\\ upload \\ bin” ：（訪問被拒絕），是加載文件和源目錄中的目錄？

try {
        CloudStorageAccount account = CloudStorageAccount.parse(storageConnectionString);
        CloudBlobClient serviceClient = account.createCloudBlobClient();

        // Container name must be lower case.
        CloudBlobContainer container = serviceClient.getContainerReference(containerName);
        container.createIfNotExists();
        File source = new File(path);
        if (source.list().length > 0) {
            for (File file : source.listFiles()) {
                CloudBlockBlob blob = container.getBlockBlobReference(file.getName());
                if (blob.exists() == false) {
                    File sourceFile = new File(source + "\\" + file.getName());
                    blob.upload(new FileInputStream(sourceFile), sourceFile.length());
                    System.out.println("File " + source + "\\" + file.getName() + " Load to blob storage");
                } else System.out.println("File " + source + "\\" + file.getName() + " Already exist in storage");
            }
        } else System.out.println("In folder " + path + " are no files ");
    } catch (FileNotFoundException fileNotFoundException) {
        System.out.print("FileNotFoundException encountered: ");
        System.out.println(fileNotFoundException.getMessage());
        System.exit(-1);

    } catch (StorageException storageException) {
        System.out.print("StorageException encountered: ");
        System.out.println(storageException.getMessage());
        System.exit(-1);
    } catch (Exception e) {
        System.out.print("Exception encountered: ");
        System.out.println(e.getMessage());
        System.exit(-1);
    }

Answer 1

就像@ ZhaoxingLu-Microsoft所說的那樣， source.listFiles()生成的file對象足以通過file.getAbsolutePath()獲取絕對文件路徑，因此您可以編寫以下代碼。

if (blob.exists() == false) {
    blob.uploadFromFile(file.getAbsolutePath());
} else System.out.println("File " + file.getAbsolutePath() + " Already exist in storage");

我在我的環境中測試您的代碼，它也可以工作。 但是，根據我的經驗， FileNotFoundException encountered: C:\\upload\\bin" :(Access is denied)問題FileNotFoundException encountered: C:\\upload\\bin" :(Access is denied)是由於缺少對C:或C:\\upload\\bin下文件的訪問權限所致。因此，您需要運行如下圖所示，以管理員身份在當前Windows環境中執行代碼。

圖1.如果使用IntelliJ，請以管理員身份運行代碼

圖2.如果使用Eclipse以管理員身份運行代碼

圖3.通過命令提示符以管理員身份運行代碼

---

更新 ：在Azure Blob存儲上，文件和目錄結構取決於Blob名稱。 因此，如果您要查看如下圖所示的文件結構，可以使用代碼String blobName = file.getAbsolutePath().replace(path, ""); 獲取Blob名稱。

圖4.在本地計算機上構建的文件和目錄結構

圖5.通過Azure Storage Explorer在Azure Blob存儲上的上述操作

這是我完整的代碼。

private static final String path = "D:\\upload\\";
private static final String storageConnectionString = "<your storage connection string>";
private static final String containerName = "<your container for uploading>";

private static CloudBlobClient serviceClient;

public static void upload(File file) throws InvalidKeyException, URISyntaxException, StorageException, IOException {
    // Container name must be lower case.
    CloudBlobContainer container = serviceClient.getContainerReference(containerName);
    container.createIfNotExists();
    String blobName = file.getAbsolutePath().replace(path, "");
    CloudBlockBlob blob = container.getBlockBlobReference(blobName);
    if (blob.exists() == false) {
        blob.uploadFromFile(file.getAbsolutePath());
    } else {
        System.out.println("File " + file.getAbsolutePath() + " Already exist in storage");
    }
}

public static void main(String[] args)
        throws URISyntaxException, StorageException, InvalidKeyException, IOException {
    CloudStorageAccount account = CloudStorageAccount.parse(storageConnectionString);
    serviceClient = account.createCloudBlobClient();
    File source = new File(path);
    for (File fileOrDir : source.listFiles()) {
        boolean isFile = fileOrDir.isFile();
        if(isFile) {
            upload(fileOrDir);
        } else {
            for(File file: fileOrDir.listFiles()) {
                upload(file);
            }
        }

    }
}