【Azure 存儲服務(wù)】Java Storage SDK 調(diào)用 uploadWithResponse 代碼示例(詢問ChatGTP得代碼原型后人力驗證)-世界快看點
2023-05-08 22:37:37    博客園
問題描述

查看Java Storage SDK，想找一個uploadWithResponse 的示例代碼，但是通過全網(wǎng)搜索，結(jié)果沒有任何有幫助的代碼。使用最近ChatGPT來尋求答案，得到非常有格式的內(nèi)容：

問：java azure storage account to use uploadWithResponse

答：To use the uploadWithResponsemethod with the Azure Blob Storage client library for Java, follow these steps:


(相關(guān)資料圖)

Add the Azure Storage Blob dependency to your project"s build file. For Maven, add the following to your pom.xml:
  com.azure  azure-storage-blob  12.14.2
Import the necessary classes:
import com.azure.storage.blob.BlobClient;import com.azure.storage.blob.BlobContainerClient;import com.azure.storage.blob.BlobServiceClient;import com.azure.storage.blob.BlobServiceClientBuilder;
Create a BlobServiceClientinstance using your storage account connection string:
String connectionString = "your_connection_string";BlobServiceClient blobServiceClient = new BlobServiceClientBuilder().connectionString(connectionString).buildClient();
Get a reference to the container and the blob you want to upload:
String containerName = "your_container_name";String blobName = "your_blob_name";BlobContainerClient containerClient = blobServiceClient.getBlobContainerClient(containerName);BlobClient blobClient = containerClient.getBlobClient(blobName);
Upload a file using the uploadWithResponsemethod:
import com.azure.storage.blob.models.BlobUploadFromFileOptions;import java.nio.file.Path;import java.nio.file.Paths;Path filePath = Paths.get("path/to/your/file");BlobUploadFromFileOptions options = new BlobUploadFromFileOptions(filePath);blobClient.uploadWithResponse(options, null, null);

This will upload the file to the specified blob in the Azure Blob Storage container. Remember to replace the placeholders with your actual connection string, container name, blob name, and file path.

繼續(xù)追問：BlobParallelUploadOptions with string content

答：(前面4步的答案一樣，第五步的內(nèi)容為)

Convert the string content to an InputStreamand set up BlobParallelUploadOptions:
String content = "your_string_content";InputStream inputStream = new ByteArrayInputStream(content.getBytes(StandardCharsets.UTF_8));long blockSize = 100 * 1024L; // 100 KBint maxConcurrency = 5;ParallelTransferOptions parallelTransferOptions = new ParallelTransferOptions(blockSize, maxConcurrency);BlobParallelUploadOptions options = new BlobParallelUploadOptions(inputStream).setParallelTra

在繼續(xù)問：如何使用 “To avoid overwriting, pass "*" to setIfNoneMatch(String ifNoneMatch). how to use the setifnonematch”

答：(前面4步的答案一樣，第五步的內(nèi)容為)Set up BlobUploadOptionswith setIfNoneMatch:
BlobUploadOptions options = new BlobUploadOptions()    .setInputStream(inputStream)    .setLength((long) content.length())    .setHttpHeaders(new BlobHttpHeaders().setContentType("text/plain"))    .setRequestConditions(new BlobRequestConditions().setIfNoneMatch("*"));
Upload the string content using the uploadWithResponsemethod with BlobUploadOptions:
blobClient.uploadWithResponse(options, null, null);

This will upload the string content to the specified blob in the Azure Blob Storage container only if the blob does not already exist. If the blob exists, the upload will fail with a BlobStorageExceptiondue to the setIfNoneMatch("*")condition. Remember to replace the placeholders with your actual connection string, container name, blob name, and string content.

問題解答

根據(jù)ChatGPT提供的三部分信息，通過人力拼接和測試。得到了成功執(zhí)行的uploadWithResponse代碼：

uploadWithResponse示例代碼
String storageConnectionString = "DefaultEndpointsProtocol=https;AccountName=***************";      　　　　　　String containerName = "******************";　　　　　　      String fileName  = "******************";                BlobServiceClient blobServiceClient = new BlobServiceClientBuilder()                                .connectionString(storageConnectionString)                                .buildClient();                BlobContainerClient containerClient = blobServiceClient.createBlobContainer(containerName);                BlobClient blobClient = containerClient.getBlobClient(fileName);                //準(zhǔn)備content并且初始化blob parallel upload options對象 　             String content = "Test to append new content into exists blob! by blogs lu bian liang zhan deng ";                InputStream inputStream = new ByteArrayInputStream(content.getBytes(StandardCharsets.UTF_8));                BlobParallelUploadOptions options = new BlobParallelUploadOptions(inputStream, content.getBytes().length);                options.setRequestConditions(new BlobRequestConditions().setIfNoneMatch("*"));                Response rsp = blobClient.uploadWithResponse(options, null, null);                if(rsp.getStatusCode()==201)                {                        System.out.println("append content successful........");                                        }

說明：

1） content 中為需要寫入Blob的內(nèi)容

2） 把string轉(zhuǎn)換為以UTF_8編碼的input stream

3） 根據(jù) input stream來初始化 blob paralle upload options對象

4） 設(shè)置 Request Conditions，當(dāng)不需要重寫的時候，可以使用 setIfNoneMatch("*")。如果操作的文件存在，則會出現(xiàn)Status code 409,BlobAlreadyExistss 提示。

5）調(diào)用upload with response方法，獲取返回值，如果 返回值得status code為 201，表示Storage Account接受了這次 blob 內(nèi)容的改動。

運行效果展示圖參考資料

BlobClient Class：https://learn.microsoft.com/en-us/java/api/com.azure.storage.blob.BlobClient?view=azure-java-stable

BlobRequestConditions Class：https://learn.microsoft.com/en-us/java/api/com.azure.storage.blob.models.blobrequestconditions?view=azure-java-stable#com-azure-storage-blob-models-blobrequestconditions-setifnonematch(java-lang-string)

適用于 Java 的 Azure Blob 存儲客戶端庫 :https://docs.azure.cn/zh-cn/storage/blobs/storage-quickstart-blobs-java?tabs=powershell%2Cmanaged-identity%2Croles-azure-portal%2Csign-in-azure-cli#upload-blobs-to-a-container

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