SpringBoot实战之文件上传微软云(Azure Storage)

前言

上传文件到Azure Storage 的案例比较少,只能到官网去研究,并且也不一定拿来就可以使用。

Blob 存储简介

为任何种类的非结构化数据使用可进行大规模缩放的对象存储

13.pic.jpg

第一步:配置pom.xml

<!-- https://mvnrepository.com/artifact/com.microsoft.azure/azure-storage -->
<dependency>
    <groupId>com.microsoft.azure</groupId>
    <artifactId>azure-storage</artifactId>
    <version>8.4.0</version>
</dependency>

第二步:增加azure blob配置

可以配置到项目中的*.properties和*yml 文件中

# properties 配置如下
azureblob.defaultEndpointsProtocol=https
azureblob.blobEndpoint=https://teststorage.blob.core.chinacloudapi.cn/
azureblob.queueEndpoint=https://teststorage.queue.core.chinacloudapi.cn/
azureblob.tableEndpoint=https://teststorage.table.core.chinacloudapi.cn/
azureblob.accountName=teststorage
azureblob.accountKey=accountkey

# yml 配置如下
azure blob
  defaultEndpointsProtocol: https
  blobEndpoint: https://teststorage.queue.core.chinacloudapi.cn/
  queueEndpoint: https://teststorage.queue.core.chinacloudapi.cn/
  tableEndpoint: https://teststorage.queue.core.chinacloudapi.cn/
  accountName: teststorage
  accountKey: account key

第三步:编写配置信息类(StorageConfig)

import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;

@Configuration
@ConfigurationProperties(prefix = "azure blob"
@NoArgsConstructor
@Data
public class StorageConfig {
    @Value("${azureblob.defaultEndpointsProtocol}")
    private String defaultEndpointsProtocol;
    @Value("${azureblob.blobEndpoint}")
    private String blobEndpoint;
    @Value("${azureblob.queueEndpoint}")
    private String queueEndpoint;
    @Value("${azureblob.tableEndpoint}")
    private String tableEndpoint;
    @Value("${azureblob.accountName}")
    private String accountName;
    @Value("${azureblob.accountKey}")
    private String accountKey;
}

**备注:这里用了lombok注解,也可以手写get/set

第四步:编写上传文件类(BlobHelper)

import com.microsoft.azure.storage.CloudStorageAccount;
import com.microsoft.azure.storage.blob.BlobContainerPermissions;
import com.microsoft.azure.storage.blob.BlobContainerPublicAccessType;
import com.microsoft.azure.storage.blob.CloudBlobClient;
import com.microsoft.azure.storage.blob.CloudBlobContainer;
 
public class BlobHelper {
     
    public static CloudBlobContainer getBlobContainer(String containerName, StorageConfig storageConfig)
    {
        try
        {
            String blobStorageConnectionString = String.format("DefaultEndpointsProtocol=%s;"
                    + "BlobEndpoint=%s;"
                    + "QueueEndpoint=%s;"
                    + "TableEndpoint=%s;"
                    + "AccountName=%s;"
                    + "AccountKey=%s", 
                    storageConfig.getDefaultEndpointsProtocol(), storageConfig.getBlobEndpoint(), 
                    storageConfig.getQueueEndpoint(), storageConfig.getTableEndpoint(), 
                    storageConfig.getAccountName(), storageConfig.getAccountKey());
             
            CloudStorageAccount account = CloudStorageAccount.parse(blobStorageConnectionString);
            CloudBlobClient serviceClient = account.createCloudBlobClient();
 
            CloudBlobContainer container = serviceClient.getContainerReference(containerName);
             
            // Create a permissions object.
            BlobContainerPermissions containerPermissions = new BlobContainerPermissions();
 
            // Include public access in the permissions object.
         containerPermissions.setPublicAccess(BlobContainerPublicAccessType.CONTAINER);
            // Set the permissions on the container.
            container.uploadPermissions(containerPermissions);
            container.createIfNotExists();
            return container;
        }
        catch(Exception e)
        {
            // 加载上传文件启动异常
            return null;
        }
    }
}

第五步:增加工具类(MyUtil)

public class MyUtils {
    private static char hexdigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e',
            'f' };

    public static String getMD5(String inStr) {
        MessageDigest md5 = null;
        try {
            md5 = MessageDigest.getInstance("MD5");
        } catch (Exception e) {

            e.printStackTrace();
            return "";
        }
        char[] charArray = inStr.toCharArray();
        byte[] byteArray = new byte[charArray.length];

        for (int i = 0; i < charArray.length; i++)
            byteArray[i] = (byte) charArray[i];

        byte[] md5Bytes = md5.digest(byteArray);

        StringBuffer hexValue = new StringBuffer();

        for (int i = 0; i < md5Bytes.length; i++) {
            int val = ((int) md5Bytes[i]) & 0xff;
            if (val < 16)
                hexValue.append("0");
            hexValue.append(Integer.toHexString(val));
        }

        return hexValue.toString();
    }

    public static String getMD5(InputStream fileStream) {

        try {
            MessageDigest md = MessageDigest.getInstance("MD5");

            byte[] buffer = new byte[2048];
            int length = -1;
            while ((length = fileStream.read(buffer)) != -1) {
                md.update(buffer, 0, length);
            }
            byte[] b = md.digest();
            return byteToHexString(b);
        } catch (Exception ex) {
            ex.printStackTrace();
            return null;
        }finally{
            try {
                fileStream.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }

    private static String byteToHexString(byte[] tmp) {
        String s;
        // 用字节表示就是 16 个字节
        char str[] = new char[16 * 2]; // 每个字节用 16 进制表示的话,使用两个字符,
        // 所以表示成 16 进制需要 32 个字符
        int k = 0; // 表示转换结果中对应的字符位置
        for (int i = 0; i < 16; i++) { // 从第一个字节开始,对 MD5 的每一个字节
            // 转换成 16 进制字符的转换
            byte byte0 = tmp[i]; // 取第 i 个字节
            str[k++] = hexdigits[byte0 >>> 4 & 0xf]; // 取字节中高 4 位的数字转换,
            // >>> 为逻辑右移,将符号位一起右移
            str[k++] = hexdigits[byte0 & 0xf]; // 取字节中低 4 位的数字转换
        }
        s = new String(str); // 换后的结果转换为字符串
        return s;
    }
}

第六步:上传文件接口( MultipartFile)

@Api(value = "微软云存储", description = "微软云存储")
@RestController
@RequestMapping("azure")
@Slf4j
public class FileUploadController {
    @Autowired
    private StorageConfig storageConfig;
@ApiOperation(value = "图片上传Azure", notes = "图片上传Azure")
    @RequestMapping(value = "/uploadImg", method = RequestMethod.POST, consumes = "multipart/*", headers = "content-type=multipart/form-data")
    public Object uploadImg(@RequestBody MultipartFile file) {
try {
            if (file != null) {
                //获取或创建container
                CloudBlobContainer blobContainer = BlobHelper.getBlobContainer(blobContainerName, storageConfig);
                if (!file.isEmpty()) {
                    try {
                      
                        //拼装blob的名称(前缀名称+文件的md5值+文件扩展名称)
                        String checkSum = MyUtils.getMD5(file.getInputStream());
                        String fileExtension = getFileExtension(file.getOriginalFilename()).toLowerCase();
                        String preName = getBlobPreName(0, false).toLowerCase();
                        String blobName = preName + checkSum + fileExtension;
                        log.info(blobName);
                        //设置文件类型,并且上传到azure blob
                        CloudBlockBlob blob = blobContainer.getBlockBlobReference(blobName);
                        blob.getProperties().setContentType(file.getContentType());
                        blob.upload(file.getInputStream(), file.getSize());
                        //将上传后的图片URL返回
                        return blob.getUri().toString();
                    } catch (Exception e) {
                        log.error("upload azure oss error:{}", e);
                    }
                }
            }
//            }
        } catch (Exception e) {
            log.error("upload azure oss error:{}", e);
        }
    } 
  return null;
}

结束

好了,一个简单的SpringBoot 上传文件至微软云的小案例就完成啦,当然如果是图片、视频等可能还需要进行文件格式的拦截,代码如下:

if (!(file.getContentType().toLowerCase().equals("image/jpg")
                                || file.getContentType().toLowerCase().equals("image/jpeg")
                                || file.getContentType().toLowerCase().equals("image/png"))) {
                            infoUniformResultTemplate.setCode(Code.FAIL.getCode());
                            log.info("图片格式不正确");
                        }

扩展

14.pic.jpg

Azure 信息保护客户端支持的文件类型如下:

  • Adobe 可移植文档格式:pdf
  • Microsoft Project:.mpp、.mpt
  • Microsoft Publisher:.pub
  • Microsoft XPS:.xps .oxps
  • 图像:.jpg、.jpe、.jpeg、.jif、.jfif、.jfi、 .png、.tif、.tiff
  • Autodesk Design Review 2013:.dwfx
  • Adobe Photoshop:.psd
  • 数码底片:.dng
  • Microsoft Office:*
    官网地址:https://docs.microsoft.com/zh-cn/azure/information-protection/rms-client/client-admin-guide-file-types):
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