大文件上传有什么好的办法？

zp8821138

@AdaptBy(type = UploadAdaptor.class, args = { "${app.root}/WEB-INF/tmp", "8192", "utf-8" })
	@At("/file")
	@Ok("json")
	public Object uploadFile(@Param("file") TempFile tmpFile, HttpServletRequest req) {
		Map<String, Object> data = new HashMap<String, Object>();
		try {
			File fromFile = tmpFile.getFile();
			String tmpName = tmpFile.getSubmittedFileName();
			String fileName = generateFileName(tmpName);
			File toFile = new File(uploadPath+fileName);
			if(!toFile.exists()){
				toFile.getParentFile().mkdirs();
				toFile.createNewFile();
			}
			copyFile(fromFile, toFile);
			data.put("fileName", fileName.replaceAll("\\\\", "/"));
			data.put("orginName", tmpName);
			Attachment attachment = new Attachment();
			attachment.setFileName(fileName);
			attachment.setFileOriginalName(tmpName);
			attachment.setUserName(getUser().getLoginname());
			attachment.setUploadIp(getUser().getLoginIp());
			attachment.setFileExtName(getFileType(fileName));
			attachment.setFilePath(uploadPath+fileName);
			attachment.setFileSize(getFileSize(tmpFile));
			attachment.setUrl(downloadUrl+"?name="+fileName.replaceAll("\\\\", "/"));
			attachmentService.insert(attachment);
			return Result.success("system.upload.success", data);
		} catch (IOException e) {
			e.printStackTrace();
			return Result.error("system.upload.error");
		}
	}

有什么好的解决方案吗。。这个是用formdata上传的为啥会导致页面有点卡啊？？是因为上传的时候导致占用了大量浏览器内存的原因吗？