Spring-如何在不存储在本地文件系统上的情况下将大型的多部分文件上传流传输到数据库 [英] Spring - How to stream large multipart file uploads to database without storing on local file system

问题描述

Spring boot的默认MultiPartResolver接口通过将多部分文件存储在本地文件系统中来处理多部分文件的上载.在输入控制器方法之前，整个多部分文件必须完成上载到服务器.

Spring boot's default MultiPartResolver interface handles the uploading of multipart files by storing them on the local file system. Before the controller method is entered, the entire multipart file must finish uploading to the server.

我们将所有上传的文件直接存储到数据库中，并且服务器的磁盘配额非常小，因此，如果上传的文件很大，则会看到IOExeption - Disk quota exceeded.

We are storing all of our uploaded files directly to a database and our servers have a very small disk quota, so if a large file is uploaded, we are seeing an IOExeption - Disk quota exceeded.

在Spring的MultiPartResolver将文件存储在本地文件系统上之前，是否有一种方法可以直接从客户端的传入请求中获取流，以便我们可以直接将其流式传输到数据库?

Is there a way to get the stream directly from the client's incoming request before Spring's MultiPartResolver stores the file on the local filesystem so the we can stream directly to our db?

推荐答案

您可以直接使用apache，如此处所述

You could use apache directly, as described here https://commons.apache.org/proper/commons-fileupload/streaming.html.

@Controller
public class UploadController {

    @RequestMapping("/upload")
    public String upload(HttpServletRequest request) throws IOException, FileUploadException {

        ServletFileUpload upload = new ServletFileUpload();

        FileItemIterator iterator = upload.getItemIterator(request);
        while (iterator.hasNext()) {
            FileItemStream item = iterator.next();

            if (!item.isFormField()) {
                InputStream inputStream = item.openStream();
                //...
            }
        }
    }
}

请确保禁用弹簧多段分解机构.

Make sure to disable springs multipart resolving mechanism.

application.yml:

application.yml:

spring:
   http:
      multipart:
         enabled: false

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