java - 无法使用 ServletFileUpload 上传 100MB 文件

Question

我必须上传 100MB 的文件。我的前端部分是 Angular 4 ，后端部分是 Java 和 Spring 4 。我已将其公开为 REST 端点。一旦我上传文件一段时间后，连接就会中断，并且它不会向前端返回任何内容。

@SuppressWarnings("unchecked")
    @RequestMapping(value = "/insertDoc.action", method = RequestMethod.POST, produces = MediaType.APPLICATION_JSON_VALUE)
    public ResponseEntity<Map<String, Object>> insertDoc(final HttpServletRequest request,
            final HttpServletResponse response, @RequestParam(name = "docType", required = false) final String docType) {
        List<DocumentMetadataVO> docIdList = new ArrayList<DocumentMetadataVO>();
        try {

            boolean isMultipart = ServletFileUpload.isMultipartContent(new ServletRequestContext(request));

            if (isMultipart) {
                DiskFileItemFactory factory = new DiskFileItemFactory();
                ServletFileUpload upload = new ServletFileUpload(factory);
                upload.setFileSizeMax(MAX_FILE_SIZE);
                upload.setSizeMax(MAX_REQUEST_SIZE);

                List<FileItem> items = upload.parseRequest(request);
                for (FileItem fileItem : items) {
                    DocumentMetadataVO documentMetadataVO = new DocumentMetadataVO();
                    documentMetadataVO.setFileData(fileItem.get());
                    documentMetadataVO.setDocumentName(fileItem.getName());
                    documentMetadataVO.setUploadDate(new Date());
                    logger.info("File Name is::" + documentMetadataVO.getDocumentName());
                    documentMetadataVO.setDocType(docType);
                    String docId = commonService.insertDocument(request, documentMetadataVO);
                    documentMetadataVO.setDocId(docId);
                    docIdList.add(documentMetadataVO);
                }
            }

        } catch (Exception e) {

            logger.error(e);
            return new ResponseEntity<Map<String, Object>>(getModelMapError(e.getMessage()),
                    HttpStatus.INTERNAL_SERVER_ERROR);
        }

        return new ResponseEntity<Map<String, Object>>(getMap(docIdList), HttpStatus.OK);
    }

Answer 1

Spring 应用程序中大文件上传失败且没有堆栈跟踪，这表明 Tomcat 配置错误。

如果文件太大，Tomcat 会自动断开连接(即使您设置了 spring.http.multipart.max-file-size 和 spring.http.multipart.max-request-大小属性)。

所以要解决这个问题，你应该配置tomcat以允许大文件上传

打开$TOMCAT_HOME/webapps/manager/WEB-INF/web.xml并编辑以下属性:

<!-- 150MB max -->
<multipart-config>
   <max-file-size>157286400</max-file-size>
   <max-request-size>209715200</max-request-size>
   <file-size-threshold>0</file-size-threshold>
</multipart-config>