oss上传指定文件只能下载

有些时候从oss想要下载资源,却只能先打开.若是想要直接下载,需指定http相应头的参数,即添加:"attach;filename=sss.txt"; 这个是前端直传以后后台处理的. 服务运行在阿里云服务器上,速度很快

//设置meta只能下载
       ObjectMetadata meta = new ObjectMetadata();
        meta.setContentDisposition("attach;filename=" + fileName);
        File localParentFile = new File(localparentPath);
        if (!localParentFile.exists()) {
            FileUtil.createDir(localParentFile);
        }
        String localPath = localparentPath + "/" + fileName;
        FileInputStream inputStream = null;
        try {
		    //下载; oss属性,key,本地路径,
            AliyunOSSUtil.downloadObject(aliyunOssPropertyFactory.getOssProperty(), ossPath, localPath);
            inputStream = new FileInputStream(localPath);
			//上传,属性,key,流,meta,指定权限
            AliyunOSSUtil.putObject(aliyunOssPropertyFactory.getOssProperty(), ossPath, inputStream, meta, AliyunOSSAcl.PRIVATE);
            new File(localPath).delete();
        } finally {
            if (null != inputStream) {
                inputStream.close();
            }
        }