1. 所需 jar 包：

<!--microsoft azure-->
<dependency>
    <groupId>com.microsoft.azure</groupId>
    <artifactId>azure-storage</artifactId>
    <version>7.0.0</version>
</dependency>

2. 程式碼：

package com.dmap.base.units.azure.blob;

import com.microsoft.azure.storage.CloudStorageAccount;
 
import com.microsoft.azure.storage.OperationContext;
import com.microsoft.azure.storage.StorageException;
import com.microsoft.azure.storage.blob.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.*;
import java.net.URISyntaxException;
import java.security.InvalidKeyException;
 

public class AzureApp {

    private AzureApp() {
    }

    private static final Logger logger = LoggerFactory.getLogger(AzureApp.class);

    /**
     * 第1步：獲取要使用的容器
     *
    * @param accountName   使用 Azure 門戶中列出的儲存帳戶的名稱
     * @param acountKey     儲存帳戶的主訪問金鑰
     * @param containerName 1.容器名稱必須以字母或數字開頭，並且只能包含字母、數字和短劃線 
 
(-) 字元。
     *                      2.每個短劃線 (-) 字元的前面和後面都必須是一個字母或數字；在容器名稱中不允許連續的短劃線 (-)。
     *                      3.容器名稱中的所有字母都必須為小寫。
     *                      4.容器名稱必須介於 3 到 63 個字元。
     * @return
     */
    public static CloudBlobContainer getCloudBlobContainer(String accountName, String acountKey, String containerName) {
        //獲取儲存連線字串
          String storageConnectionString = "DefaultEndpointsProtocol=https;AccountName=" + accountName + ";AccountKey=" + acountKey + ";EndpointSuffix=core.chinacloudapi.cn";
        CloudStorageAccount storageAccount;
        CloudBlobClient blobClient = null;
        CloudBlobContainer container = null;
        try {
            storageAccount = CloudStorageAccount.parse(storageConnectionString);
            blobClient = storageAccount.createCloudBlobClient();
            container = blobClient.getContainerReference(containerName);
            container.createIfNotExists(BlobContainerPublicAccessType.CONTAINER, new BlobRequestOptions(), new OperationContext());
        } catch (URISyntaxException | InvalidKeyException | StorageException e) {
            logger.error("第1步：獲取要使用的容器 error from Azure server. ", e);
        } catch (Exception e) {
            logger.error("第1步：獲取要使用的容器 error from Azure server. ", e);
        }
        return container;
    }

    /**
     * 上傳Blob
     * 建立 Blob或更新Blob（如果該 Blob 已存在）
      *
     * @param container 要上傳的容器
      * @param filePath  檔案路徑 eg: "/home/edmond/Pictures/古天樂.jpg"
     * @return blob url eg: "https://testpmpd.blob.core.chinacloudapi.cn/pmpd-container/古天樂.jpg"
     */
    public static String uploadBlob(CloudBlobContainer container, String filePath) {
        FileInputStream fileInputStream = null;
        CloudBlockBlob blob = null;
        try {
            File source = new File(filePath);
            blob = container.getBlockBlobReference(source.getName());
            fileInputStream = new FileInputStream(source);
            blob.upload(fileInputStream, source.length());
        } catch (URISyntaxException | StorageException | FileNotFoundException e) {
            logger.error("上傳Blob error from Azure server. ", e);
        } catch (IOException e) {
            logger.error("上傳Blob error from Azure server. ", e);
        } catch (Exception e) {
            logger.error("上傳Blob error from Azure server. ", e);
        } finally {
            try {
                if (fileInputStream != null) {
                    fileInputStream.close();
                }
            } catch (IOException e) {
                logger.error("上傳Blob error from Azure server. ", e);
            }
        }
        String returnValue = null;
        if (blob != null) {
            returnValue = blob.getUri().toString();
        }
        return returnValue;
    }

    /**
     * 下載 Blob
     *
     * @param container 要下載的容器
      * @param filePath  下載檔案要儲存的資料夾路徑 eg: "/home/edmond/Pictures/"
     * @param blobName  要下載的blob名 eg: "古天樂.jpg"
     */
    public static void downloadBlob(CloudBlobContainer container, String filePath, String blobName) {
        FileOutputStream fileOutputStream = null;
        try {
            for (ListBlobItem blobItem : container.listBlobs()) {
                if (blobItem instanceof CloudBlob) {
                    CloudBlob blob = (CloudBlob) blobItem;
                    if (blob.getName().equals(blobName)) {
                        fileOutputStream = new FileOutputStream(filePath + blob.getName());
                        blob.download(fileOutputStream);
                    }
                }
            }
        } catch (FileNotFoundException | StorageException e) {
            logger.error("下載 Blob error from Azure server. ", e);
        } catch (IOException e) {
            logger.error("下載 Blob error from Azure server. ", e);
        } catch (Exception e) {
            logger.error("下載 Blob error from Azure server. ", e);
        } finally {
            try {
                if (fileOutputStream != null) {
                    fileOutputStream.close();
                }
            } catch (IOException e) {
                logger.error("下載 Blob error from Azure server. ", e);
            }
        }
    }

    /**
     * 刪除 Blob
     *
     * @param container 檔案所在的容器
      * @param blobName  要刪除的檔名 eg: "古天樂.jpg"
     * @return true or false
     */
    public static boolean deleteBlob(CloudBlobContainer container, String blobName) {
        boolean success = false;
        try {
            CloudBlockBlob blob = container.getBlockBlobReference(blobName);
            success = blob.deleteIfExists();
        } catch (URISyntaxException | StorageException e) {
            logger.error("刪除 Blob error from Azure server. ", e);
        } catch (Exception e) {
            logger.error("刪除 Blob error from Azure server. ", e);
        }
        return success;
    }

}