问如何使用预先签名的URL将文件上传到S3，而无需将其加载到内存中

EN

public boolean uploadFileDirectlyToS3(MultipartFile multipartFile, String keyName) {
        ObjectMetadata data = new ObjectMetadata();
        try {
            data.setContentType(multipartFile.getContentType());
            data.setContentLength(multipartFile.getSize());
            s3Client.putObject(CORE_BUNDLE.getString("bucket.name"), keyName, multipartFile.getInputStream(), data); 
//KeyName is the specific and unique path where you wanna place your file in s3
            return true;
        } catch (Exception e) {
            logger.error("Error occured while uploading file to s3 having name: "+multipartFile.getOriginalFilename(), e);
            return false;
        }
    }