Блог

Следующее https://docs.microsoft.com/en-us/azure/storage/blobs/storage-quickstart-blobs-java?tabs=powershell получите эту ошибку:

 Caused by: java.lang.IllegalStateException: A request was made to load the default HttpClient provider but one could not be found on the classpath. If you are using a dependency manager, consider including a dependency on azure-core-http-netty or azure-core-http-okhttp. Depending on your existing dependencies, you have the choice of Netty or OkHttp implementations. Additionally, refer to https://aka.ms/azsdk/java/docs/custom-httpclient to learn about writing your own implementation.
at com.azure.core.implementation.http.HttpClientProviders.createInstance(HttpClientProviders.java:37)
at com.azure.core.http.HttpClient.createDefault(HttpClient.java:27)
at com.azure.core.http.HttpPipelineBuilder.build(HttpPipelineBuilder.java:60)
at com.azure.storage.blob.implementation.util.BuilderHelper.buildPipeline(BuilderHelper.java:110)
at com.azure.storage.blob.BlobServiceClientBuilder.buildAsyncClient(BlobServiceClientBuilder.java:107)
at com.azure.storage.blob.BlobServiceClientBuilder.buildClient(BlobServiceClientBuilder.java:84)
 

Ошибка будет возникать при невозможности найти HttpClient. Похоже, это не связано с кодом. Попробуйте проверить, следуете ли вы инструкциям в документации.

Я пытаюсь выполнить следующий код в App.java и это хорошо работает.

 StorageSharedKeyCredential credential = new StorageSharedKeyCredential(accountName, accountKey);
BlobServiceClient blobServiceClient = new BlobServiceClientBuilder().endpoint(endpoint).credential(credential).buildClient();
 

При удалении credential() он вернет эту ошибку: ResourceNotFound Указанный ресурс не существует.

Доступ к общедоступному blob-объекту без учетных данных:

это работает:

возьмите https://github.com/Azure-Samples/azure-sdk-for-java-storage-blob-upload-download

измените версии azure в pom на 12.9

экспорт AZURE_STORAGE_ACCOUNT=azuremlexamples

редактировать, как показано ниже

 import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Writer;

import com.azure.storage.blob.BlobClient;
import com.azure.storage.blob.BlobContainerClient;
import com.azure.storage.blob.BlobServiceClient;
import com.azure.storage.blob.BlobServiceClientBuilder;
import com.azure.storage.common.StorageSharedKeyCredential;

public class Quickstart {
    static File createTempFile() throws IOException {

        // Here we are creating a temporary file to use for download and upload to Blob
        // storage
        File sampleFile = null;
        sampleFile = File.createTempFile("sampleFile", ".txt");
        System.out.println(">> Creating a sample file at: "   sampleFile.toString());
        Writer output = new BufferedWriter(new FileWriter(sampleFile));
        output.write("Hello Azure Storage blob quickstart.");
        output.close();

        return sampleFile;
    }

    public static void main(String[] args) throws IOException {

        // Creating a sample file to use in the sample
        File sampleFile = null;
        sampleFile = createTempFile();
        String downloadedFilePath = "downloadedFile.txt";

        // Retrieve the credentials and initialize SharedKeyCredentials
        String accountName = System.getenv("AZURE_STORAGE_ACCOUNT");
        String accountKey = System.getenv("AZURE_STORAGE_ACCESS_KEY");
        String endpoint = "https://"   accountName   ".blob.core.windows.net";
        String containerName = "datasets";
        String blobName = "iris.csv";

        // Create a SharedKeyCredential
        //StorageSharedKeyCredential credential = new StorageSharedKeyCredential(accountName, accountKey);
       
        // Create a blobServiceClient
        BlobServiceClient blobServiceClient = new BlobServiceClientBuilder()
            .endpoint(endpoint)
            .buildClient();

        // Create a containerClient
        BlobContainerClient blobContainerClient = blobServiceClient.getBlobContainerClient(containerName);

        // Create a container
//        blobServiceClient.createBlobContainer(containerName);
  //      System.out.printf("Creating a container : %s %n", blobContainerClient.getBlobContainerUrl());

        // Create a BlobClient to run operations on Blobs
    //    BlobClient blobClient = blobContainerClient.getBlobClient(blobName);

                System.out.println("Listing blobs in the container: "   blobContainerClient.getBlobContainerUrl());
                blobContainerClient.listBlobs()
                        .forEach(
                            blobItem -> System.out.println("This is the blob name: "   blobItem.getName()));
        }
    }
 

запустите mvn compile exec: java

вывод:

Список больших двоичных объектов в контейнере: https://azuremlexamples.blob.core.windows.net/datasets Это имя большого двоичного объекта: criteo-uplift-v2.1.csv.gz Это имя большого двоичного объекта: iris.csv