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Blobs in Azure Storage are organized into containers. Before you can upload a blob, you must first create a container. This article shows how to create containers with the [Azure Storage client library for Java](/java/api/overview/azure/storage-blob-readme).
- This article assumes you already have a project set up to work with the Azure Blob Storage client library for Java. To learn about setting up your project, including package installation, adding `import` directives, and creating an authorized client object, see [Get Started with Azure Storage and Java](storage-blob-java-get-started.md).
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- The [authorization mechanism](../common/authorize-data-access.md) must have permissions to create a blob container. To learn more, see the authorization guidance for the following REST API operation:
The authorization mechanism must have the necessary permissions to create a container. For authorization with Microsoft Entra ID (recommended), you need Azure RBAC built-in role **Storage Blob Data Contributor** or higher. To learn more, see the authorization guidance for [Create Container (REST API)](/rest/api/storageservices/create-container#authorization).
This article shows how to delete containers with the [Azure Storage client library for Java](/java/api/overview/azure/storage-blob-readme). If you've enabled [container soft delete](soft-delete-container-overview.md), you can restore deleted containers.
- This article assumes you already have a project set up to work with the Azure Blob Storage client library for Java. To learn about setting up your project, including package installation, adding `import` directives, and creating an authorized client object, see [Get Started with Azure Storage and Java](storage-blob-java-get-started.md).
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- The [authorization mechanism](../common/authorize-data-access.md) must have permissions to delete a blob container, or to restore a soft-deleted container. To learn more, see the authorization guidance for the following REST API operations:
The authorization mechanism must have the necessary permissions to delete or restore a container. For authorization with Microsoft Entra ID (recommended), you need Azure RBAC built-in role **Storage Blob Data Contributor** or higher. To learn more, see the authorization guidance for [Delete Container (REST API)](/rest/api/storageservices/delete-container#authorization) and [Restore Container (REST API)](/rest/api/storageservices/restore-container#authorization).
This article shows how to create and manage container leases using the [Azure Storage client library for Java](/java/api/overview/azure/storage-blob-readme). You can use the client library to acquire, renew, release, and break container leases.
- This article assumes you already have a project set up to work with the Azure Blob Storage client library for Java. To learn about setting up your project, including package installation, adding `import` directives, and creating an authorized client object, see [Get Started with Azure Storage and Java](storage-blob-java-get-started.md).
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- The [authorization mechanism](../common/authorize-data-access.md) must have permissions to work with a container lease. To learn more, see the authorization guidance for the following REST API operation:
The authorization mechanism must have the necessary permissions to work with a container lease. For authorization with Microsoft Entra ID (recommended), you need Azure RBAC built-in role **Storage Blob Data Contributor** or higher. To learn more, see the authorization guidance for [Lease Container (REST API)](/rest/api/storageservices/lease-container#authorization).
Blob containers support system properties and user-defined metadata, in addition to the data they contain. This article shows how to manage system properties and user-defined metadata with the [Azure Storage client library for Java](/java/api/overview/azure/storage-blob-readme).
- This article assumes you already have a project set up to work with the Azure Blob Storage client library for Java. To learn about setting up your project, including package installation, adding `import` directives, and creating an authorized client object, see [Get Started with Azure Storage and Java](storage-blob-java-get-started.md).
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- The [authorization mechanism](../common/authorize-data-access.md) must have permissions to work with container properties or metadata. To learn more, see the authorization guidance for the following REST API operations:
The authorization mechanism must have the necessary permissions to work with container properties or metadata. For authorization with Microsoft Entra ID (recommended), you need Azure RBAC built-in role **Storage Blob Data Reader** or higher for the *get* operations, and **Storage Blob Data Contributor** or higher for the *set* operations. To learn more, see the authorization guidance for [Get Container Properties (REST API)](/rest/api/storageservices/get-container-properties#authorization), [Set Container Metadata (REST API)](/rest/api/storageservices/set-container-metadata#authorization), or [Get Container Metadata (REST API)](/rest/api/storageservices/get-container-metadata#authorization).
When you list the containers in an Azure Storage account from your code, you can specify several options to manage how results are returned from Azure Storage. This article shows how to list containers using the [Azure Storage client library for Java](/java/api/overview/azure/storage-blob-readme).
- This article assumes you already have a project set up to work with the Azure Blob Storage client library for Java. To learn about setting up your project, including package installation, adding `import` directives, and creating an authorized client object, see [Get Started with Azure Storage and Java](storage-blob-java-get-started.md).
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- The [authorization mechanism](../common/authorize-data-access.md) must have permissions to list blob containers. To learn more, see the authorization guidance for the following REST API operation:
The authorization mechanism must have the necessary permissions to list blob containers. For authorization with Microsoft Entra ID (recommended), you need Azure RBAC built-in role **Storage Blob Data Contributor** or higher. To learn more, see the authorization guidance for [List Containers (REST API)](/rest/api/storageservices/list-containers2#authorization).
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The client library methods covered in this article use the [Copy Blob](/rest/api/storageservices/copy-blob) REST API operation, and can be used when you want to perform a copy with asynchronous scheduling. For most copy scenarios where you want to move data into a storage account and have a URL for the source object, see [Copy a blob from a source object URL with Java](storage-blob-copy-url-java.md).
- This article assumes you already have a project set up to work with the Azure Blob Storage client library for Java. To learn about setting up your project, including package installation, adding `import` directives, and creating an authorized client object, see [Get Started with Azure Storage and Java](storage-blob-java-get-started.md).
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- The [authorization mechanism](../common/authorize-data-access.md) must have permissions to perform a copy operation, or to abort a pending copy. To learn more, see the authorization guidance for the following REST API operations:
The authorization mechanism must have the necessary permissions to perform a copy operation, or to abort a pending copy. For authorization with Microsoft Entra ID (recommended), the least privileged Azure RBAC built-in role varies based on several factors. To learn more, see the authorization guidance for [Copy Blob (REST API)](/rest/api/storageservices/copy-blob#authorization) or [Abort Copy Blob (REST API)](/rest/api/storageservices/abort-copy-blob#authorization).
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The client library methods covered in this article use the [Put Blob From URL](/rest/api/storageservices/put-blob-from-url) and [Put Block From URL](/rest/api/storageservices/put-block-from-url) REST API operations. These methods are preferred for copy scenarios where you want to move data into a storage account and have a URL for the source object. For copy operations where you want asynchronous scheduling, see [Copy a blob with asynchronous scheduling using Java](storage-blob-copy-async-java.md).
- This article assumes you already have a project set up to work with the Azure Blob Storage client library for Java. To learn about setting up your project, including package installation, adding `import` directives, and creating an authorized client object, see [Get Started with Azure Storage and Java](storage-blob-java-get-started.md).
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-[Put Blob From URL](/rest/api/storageservices/put-blob-from-url#authorization)
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-[Put Block From URL](/rest/api/storageservices/put-block-from-url#authorization)
The authorization mechanism must have the necessary permissions to perform a copy operation. For authorization with Microsoft Entra ID (recommended), you need Azure RBAC built-in role **Storage Blob Data Contributor** or higher. To learn more, see the authorization guidance for [Put Blob From URL (REST API)](/rest/api/storageservices/put-blob-from-url#authorization) or [Put Block From URL (REST API)](/rest/api/storageservices/put-block-from-url#authorization).
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The following example shows a scenario for copying from a source blob within Azure. The [uploadFromUrl](/java/api/com.azure.storage.blob.specialized.blockblobclient#method-details) method can optionally accept a Boolean parameter to indicate whether an existing blob should be overwritten, as shown in the example.
The [uploadFromUrlWithResponse](/java/api/com.azure.storage.blob.specialized.blockblobclient#method-details) method can also accept a [BlobUploadFromUrlOptions](/java/api/com.azure.storage.blob.options.blobuploadfromurloptions) parameter to specify further options for the operation.
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## Copy a blob from an external source
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You can perform a copy operation on any source object that can be retrieved via HTTP GET request on a given URL, including accessible objects outside of Azure. The following example shows a scenario for copying a blob from an accessible source object URL.
To learn more about copying blobs using the Azure Blob Storage client library for Java, see the following resources.
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### Code samples
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-[View code samples from this article (GitHub)](https://github.com/Azure-Samples/AzureStorageSnippets/blob/master/blobs/howto/Java/blob-devguide/blob-devguide-blobs/src/main/java/com/blobs/devguide/blobs/BlobCopyPutFromURL.java)
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### REST API operations
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The Azure SDK for Java contains libraries that build on top of the Azure REST API, allowing you to interact with REST API operations through familiar Java paradigms. The client library methods covered in this article use the following REST API operations:
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-[Put Blob From URL](/rest/api/storageservices/put-blob-from-url) (REST API)
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-[Put Block From URL](/rest/api/storageservices/put-block-from-url) (REST API)
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### Code samples
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-[View code samples from this article (GitHub)](https://github.com/Azure-Samples/AzureStorageSnippets/blob/master/blobs/howto/Java/blob-devguide/blob-devguide-blobs/src/main/java/com/blobs/devguide/blobs/BlobCopy.java)
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