列出 Azure 中（子）目录中的所有文件

Question

我正在使用 Java 开发一个 azure 函数。我需要迭代以下文件夹中的所有文件

aDirectory/aSubdirectoryWithManyFiles/

该路径中有很多文件：

aDirectory/aSubdirectoryWithManyFiles/file1
aDirectory/aSubdirectoryWithManyFiles/file2
aDirectory/aSubdirectoryWithManyFiles/file3
aDirectory/aSubdirectoryWithManyFiles/file4
aDirectory/aSubdirectoryWithManyFiles/file5

所以我写了下面的代码来获取它们：

// myCloudBlobContainer is a CloudBlobContainer
// I expected to get all files thanks to the next row
Iterable<ListBlobItem> blobs = myCloudBlobContainer.listBlobs();
// The only blob found in the container is the directory itself
for (ListBlobItem blob : blobs) {
    //log the current blob URI
    if (blob instanceof CloudBlob) {  // this never happens
        CloudBlob cloudBlob = (CloudBlob) blob;
        //make nice things with every found file
    }
}

中迭代的唯一 blobfor是目录，没有预期的文件。所以在日志中我只得到以下 URI：

https://blablablabla.blob.core.windows.net/aDirectory/aSubdirectoryWithManyFiles/

我应该怎么做才能访问每个文件？

万一我有多个子目录，如下例所示？

aDirectory/aSubdirectoryWithManyFiles/files(1-5)
aDirectory/anotherSubdirectoryWithManyFiles/files(6-10)

提前致谢

---

编辑

为了使方法可测试，该项目使用包装器和接口，而不是直接使用 CloudBlobContainer；基本上，CloudBlobContainer 由下式给出CloudBlobClient.getContainerReference("containername")

回答完这个问题后，我将代码更改为以下内容，因此我使用带有参数的 listBlobsmyCloudBlobContainer.listBlobs("aDirectory", true)并编写了以下代码以获得全部内容：

// myCloudBlobClient is a CloudBlobClient
CloudBlobContainer myCloudBlobContainer = myCloudBlobClient.getContainerReference("containername")
// I expected to get all files thanks to the next row
Iterable<ListBlobItem> blobs = myCloudBlobContainer.listBlobs("aDirectory", true); // HERE THE CHANGE
// No blob found this time
for (ListBlobItem blob : blobs) { // NEVER IN THE FOR
    //log the current blob URI
    if (blob instanceof CloudBlob) {
        CloudBlob cloudBlob = (CloudBlob) blob;
        //make nice things with every found file
    }
}

但这一次，事情根本就没有发生for……

Answer 1

我必须说，之前的回答让我浪费了时间；问题在于，只有一个for不足以在文件夹中查找文件。第一个for找到文件夹和子文件夹，加上（也许，我没有检查）“根”（让我们这样称呼它）中的文件。

有了文件夹，我们必须将每个文件夹转换为 CloudBlobDirectory 以便查看并使用另一个for.

这是适合我的解决方案：

// myCloudBlobClient is a CloudBlobClient
CloudBlobContainer myCloudBlobContainer = myCloudBlobClient.getContainerReference("containername")
// I expected to get all files thanks to the next row
Iterable<ListBlobItem> blobs = myCloudBlobContainer.listBlobs();
// only directories here, another for needed to scan files
for (ListBlobItem blob : blobs) {
    if (blob instanceof CloudBlobDirectory) {
        CloudBlobDirectory directory = (CloudBlobDirectory)blob;
        //next is in try/catch
        Iterable<ListBlobItem> fileBlobs = directory.listBlobs();
        for (ListBlobItem fileBlob : fileBlobs) {
            if (fileBlob instanceof CloudBlob) {
            CloudBlob cloudBlob = (CloudBlob) fileBlob;
            //make nice things with every found file
            }
        }
    } // else: may be we found a cloudBlob in root?
}

这帮助我找到了正确的方法：

https://social.msdn.microsoft.com/Forums/en-US/1cfdc91f-e588-4839-a878-9650339a0a06/list-all-blobs-in-c?forum=windowsazuredata