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**Java Storage SDK uploadWithResponse 示例代码** ```java import com.azure.storage.blob.BlobClient; import com.azure.storage.blob.BlobContainerClient; import com.azure.storage.blob.BlobServiceClient; import com.azure.storage.blob.BlobServiceClientBuilder; // 连接字符串 String storageConnectionString = "DefaultEndpointsProtocol=https;AccountName=***************"; // 容器名称 String containerName = "******************"; // 文件名称 String fileName = "******************"; // 连接池 BlobServiceClient blobServiceClient = new BlobServiceClientBuilder().connectionString(storageConnectionString).buildClient(); // 容器客户端 BlobContainerClient containerClient = blobServiceClient.createBlobContainer(containerName); // 存储客户端 BlobClient blobClient = containerClient.getBlobClient(fileName); // 创建上传选项 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)); // 设置请求条件 BlobUploadOptions options = new BlobUploadOptions() .setInputStream(inputStream) .setLength((long) content.length()) .setHttpHeaders(new BlobHttpHeaders().setContentType("text/plain")) .setRequestConditions(new BlobRequestConditions().setIfNoneMatch("*\")); // 执行上传 Response<BlockBlobItem> rsp = blobClient.uploadWithResponse(options, null, null); // 检查状态码 if (rsp.getStatusCode() == 201) { // 上传成功 System.out.println("append content successful........"); } else { // 上传失败 System.out.println("upload failed with status code " + rsp.getStatusCode()); } ``` **注意:** * 代码中的 `connectionString`、`containerName` 和 `fileName` 要根据您的实际配置进行修改。 * 代码中的 `content` 应该包含要上传的字符串内容。 * 此代码仅用于上传文件，如果您需要上传其他类型的对象，请使用相应的类和方法。

正文

问题描述

查看Java Storage SDK，想找一个 uploadWithResponse  的示例代码，但是通过全网搜索，结果没有任何有帮助的代码。使用最近ChatGPT来寻求答案，得到非常有格式的内容：

问：java azure storage account to use uploadWithResponse

答：To use the uploadWithResponse method with the Azure Blob Storage client library for Java, follow these steps: Add the Azure Storage Blob dependency to your project's build file. For Maven, add the following to your pom.xml: <dependency> <groupId>com.azure</groupId> <artifactId>azure-storage-blob</artifactId> <version>12.14.2</version> </dependency> 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 BlobServiceClient instance 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 uploadWithResponse method: 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.

继续追问：BlobParallelUploadOptions with string content

答：(前面4步的答案一样，第五步的内容为) Convert the string content to an InputStream and set up BlobParallelUploadOptions: String content = "your_string_content"; InputStream inputStream = new ByteArrayInputStream(content.getBytes(StandardCharsets.UTF_8)); long blockSize = 100 * 1024L; // 100 KB int maxConcurrency = 5; ParallelTransferOptions parallelTransferOptions = new ParallelTransferOptions(blockSize, maxConcurrency); BlobParallelUploadOptions options = new BlobParallelUploadOptions(inputStream).setParallelTra

在继续问：如何使用 “To avoid overwriting, pass "*" to setIfNoneMatch(String ifNoneMatch). how to use the setifnonematch”

答：(前面4步的答案一样，第五步的内容为) Set up BlobUploadOptions with 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 uploadWithResponse method 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 BlobStorageException due to the setIfNoneMatch("*") condition. Remember to replace the placeholders with your actual connection string, container name, blob name, and string content.

 

问题解答

根据ChatGPT提供的三部分信息，通过人力拼接和测试。得到了成功执行的uploadWithResponse代码：

uploadWithResponse示例代码

说明：

1） content 中为需要写入Blob的内容

2） 把string转换为以UTF_8编码的input stream

3） 根据 input stream来初始化 blob paralle upload options对象

4） 设置 Request Conditions，当不需要重写的时候，可以使用 setIfNoneMatch("*")。如果操作的文件存在，则会出现  Status code 409, BlobAlreadyExistss 提示。

5） 调用upload with response方法，获取返回值，如果 返回值得status code为 201，表示Storage Account接受了这次 blob 内容的改动。

 

运行效果展示图

 

 

参考资料

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)

适用于 Java 的 Azure Blob 存储客户端库 : 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