如果您想直接上传文件到azure blob，请参考以下步骤
软件开发包

<dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.3.1</version>
        </dependency>
<dependency>
            <groupId>com.azure</groupId>
            <artifactId>azure-storage-blob</artifactId>
            <version>12.6.0</version>
        </dependency

代码

@PostMapping(path = "/upload")
    public String uploadFile(@RequestParam("file") MultipartFile file) throws IOException {
        String constr="";

        BlobContainerClient container = new BlobContainerClientBuilder()
                .connectionString(constr)
                .containerName("upload")
                .buildClient();

        BlobClient blob=container.getBlobClient(file.getOriginalFilename());

        blob.upload(file.getInputStream(),file.getSize(),true);

        return "ok";
    }