实现文件上传和下载的方法: 创建一个Service或Controller类,实现文件上传和下载的方法: @ServicepublicclassFileService{@AutowiredprivateOSSClient ossClient;@Value("${oss.bucketName}")privateString bucketName;publicStringuploadFile(String filename, InputStream inputStream){ ossClient.putObject(bucketName, filena...