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
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 azureblob: 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: accountkey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 = "azureblob") @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
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:*