【Azure Storage Account】Java Code访问Storage Account File Share的上传和下载代码示例

问题描述

使用Azure Storage Account 的File Share，如何通过Java 代码来下载、上传文件呢？

 

问题解答

参考Github中Azure File Share代码介绍( https://github.com/Azure/azure-sdk-for-java/tree/main/sdk/storage/azure-storage-file-share#azure-file-share-client-library-for-java  )。可以使用 azure-storage-file-share 来实现上传下载功能。

第一步：引入 azure-storage-file-share JDK

 <dependency>
  <groupId>com.azure</groupId>
  <artifactId>azure-storage-file-share</artifactId>
  <version>12.28.0-beta.1</version>
</dependency>

第二步：根据 Storage Account的Connection String和File Share Endpoint创建 ShareDirectoryClient  或 ShareFileClient 对象

第三步：调用 upload() 或 downloadToFile() 上传/下载文件

 

完整的示例代码如下：

package com.blobs.quickstart;

/**
 * Azure blob storage v12 SDK quickstart
 */ 

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;

import com.azure.storage.file.share.ShareDirectoryClient;
import com.azure.storage.file.share.ShareFileClient;
import com.azure.storage.file.share.ShareFileClientBuilder;

public class App
{
    public static void main( String[] args ) throws IOException
    {
         
        System.out.println("Azure file share\n");
        
        final String ACCOUNT_NAME = "";
        final String CONNECTION_STRING = "";
        final String SHARE_NAME = "";
        final String DIRECTORY_PATH = "test";
        final String FILE_NAME = "code.txt";

        String fileURL = String.format("https://%s.file.core.chinacloudapi.cn", ACCOUNT_NAME);
        ShareDirectoryClient directoryClient = new ShareFileClientBuilder()
            .connectionString(CONNECTION_STRING)
            .endpoint(fileURL)
            .shareName(SHARE_NAME)
            .resourcePath(DIRECTORY_PATH)
            .buildDirectoryClient();
        //Upload file
        String fileName = "testfile1.txt";
        long maxSize = 1024;
        ShareFileClient fclient = directoryClient.createFile(fileName, maxSize);

        String uploadText = "Hello, World! This is a test file for Azure file share.\n";
        InputStream data = new ByteArrayInputStream(uploadText.getBytes(StandardCharsets.UTF_8));
        fclient.upload(data, uploadText.length());

        //Download file
        ShareFileClient fileClient= new ShareFileClientBuilder()
            .connectionString(CONNECTION_STRING)
            .endpoint(fileURL)
            .shareName(SHARE_NAME)
            .resourcePath(DIRECTORY_PATH + "/" + FILE_NAME)
            .buildFileClient();

        fileClient.downloadToFile("downloaded_"+java.util.UUID.randomUUID() + "_" + FILE_NAME);

        System.out.println("Done");
    }
}

完整的POM.xml

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.blobs.quickstart</groupId>
  <artifactId>blob-quickstart-v12</artifactId>
  <version>1.0-SNAPSHOT</version>

  <name>blob-quickstart-v12</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>
 <dependency>
  <groupId>com.azure</groupId>
  <artifactId>azure-storage-file-share</artifactId>
  <version>12.28.0-beta.1</version>
</dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-api</artifactId>
      <version>1.7.25</version>
  </dependency>
  <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-log4j12</artifactId>
      <version>1.7.25</version>
  </dependency>
  <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>1.2.17</version>
  </dependency>
  </dependencies>

  <build>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.1.0</version>
        </plugin>
        <!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.8.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.22.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-jar-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
        <!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
        <plugin>
          <artifactId>maven-site-plugin</artifactId>
          <version>3.7.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-project-info-reports-plugin</artifactId>
          <version>3.0.0</version>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>
</project>

测试结果：

 

参考资料

Azure File Share client library for Java ： https://github.com/Azure/azure-sdk-for-java/tree/main/sdk/storage/azure-storage-file-share#azure-file-share-client-library-for-java