In this blog, How to download files from Azure Blob Storage using Java is shown.
▼1. List file names and download files from Azure Blob Storage
Using IntelliJ IDEA 2021.1.2 (Community Edition) on Ubuntu , Java application lists files on Azure Blob Storage and downloads these files.
▼2. Prerequisites
2-1. Installing Java 8 JDK
Azul Zulu OpenJDK Java 8 (LTS) is supportable on Azure Service. steps of installation are shown in this document. Download Azul Zulu Builds of OpenJDK | Azul
e.g) JAVA_HOME
$echo $JAVA_HOME
/usr/lib/jvm/zulu-8-azure-jdk_8.54.0.21-8.0.292-linux_x64/
2-2. Free trial Azure account for Azure Blob Storage
2-3. Connecting to Azure Blob Storage using Azure Storage Explorer
Creating Container and putting the file “abc.txt” into Azure Blob Storage
▼3. List files and download these files from Azure Blob Storage
3-1. Starting IntelliJ IDEA and confirming JDK version
Starting IntelliJ IDEA using idea.sh command. after that, we can confirm JDK version from Menu -> [File] -> [New] -> [Project] -> [Maven]
(e.g)
~/Downloads/idea-IC-211.7142.45/bin/idea.sh
3-2. Updating pom.xml for operations of Azure Blob Storage
This dependency is added in pom.xml
<dependencies> <dependency> <groupId>com.azure</groupId> <artifactId>azure-storage-blob</artifactId> <version>12.11.1</version> </dependency> </dependencies>
Sync is executed automatically by clicking the following putton.

3-3. Creating Java Code
A Java code is created to download files from Azure Blob Storage. at first, in the project, we do right click [src]-[main]-[java] and choose [New] – [java Class]. after that, name of this code needs to be entered. this code implement the following steps.
- List files on Azure Blob Storage
- Download these files from Azure Blob Storage
e.g)
import com.azure.storage.blob.*;
import com.azure.storage.blob.models.BlobItem;
public class Sampleblacc {
public static void main(String[] args) {
String connectStr = "<ConnectionString>";
String containerName = "files";
String downloadFileName = "abc.txt";
String localPath = "/home/user/";
// Create a BlobServiceClient object which will be used to create a container client
BlobServiceClient blobServiceClient = new BlobServiceClientBuilder().connectionString(connectStr).buildClient();
BlobContainerClient containerClient = blobServiceClient.getBlobContainerClient(containerName);
System.out.println("\nListing blobs...");
// List the blob(s) in the container.
for (BlobItem blobItem : containerClient.listBlobs()) {
System.out.println("\t" + blobItem.getName());
}
//Get a reference to a blob
BlobClient blobClient = containerClient.getBlobClient(downloadFileName);
//Download the blob to a local file
System.out.println("\nDownloading blob to \n\t " + localPath + downloadFileName);
blobClient.downloadToFile(localPath + downloadFileName);
}
}
3-4. Results of this code
Build this code from [Build] menu -> [Build Project] and Run code by clicking [Run] in the menue -> [Run]]
e.g) a part of output Listing blobs... README.md abc.txt Downloading blob to /home/user/abc.txt
▼4. Reference
- Azure free account FAQ
- Quickstart: Azure Blob storage client library v8 for Java | Microsoft Docs
- Quickstart: Azure Blob Storage library v12 – Java | Microsoft Docs
That’s all. Have a nice day ahead !!!