解释下面代码：public Document uploadDocument(MultipartFile file, FileUploadCondition condition, String projectFolderId, String projectId) { Document document = null; try { if (StringUtils.isEmpty(condition.getFileId())) { condition.setFileId(null); } String folderId = createNewDateFolder(projectFolderId, projectId); document = documentService.breakpointUpload(file, condition.getChunkNumber(), condition.getTotalChunks(), condition.getMd5Identifier(), condition.getFileId(), folderId, null); } catch (Exception e) { log.error("上传文件失败，fileName=[{}]，错误信息：", file.getOriginalFilename(), e); throw new BimdcException(HttpStatus.BAD_REQUEST.value(), "上传文件失败，请稍后重试！"); } if (document == null || StringUtils.isEmpty(document.getFileId())) { log.error("上传文件失败，fileName=[{}]", file.getOriginalFilename()); throw new BimdcException(HttpStatus.BAD_REQUEST.value(), "上传文件失败，请稍后重试！"); } return document; }

上传文件的代码

文件上传的代码

给下面代码添加注释：public Document uploadDocument(MultipartFile file, FileUploadCondition condition, String projectFolderId, String projectId) { Document document = null; try { if (StringUtils.isEmpty(condition.getFileId())) { condition.setFileId(null); } String folderId = createNewDateFolder(projectFolderId, projectId); document = documentService.breakpointUpload(file, condition.getChunkNumber(), condition.getTotalChunks(), condition.getMd5Identifier(), condition.getFileId(), folderId, null); } catch (Exception e) { log.error("上传文件失败，fileName=[{}]，错误信息：", file.getOriginalFilename(), e); throw new BimdcException(HttpStatus.BAD_REQUEST.value(), "上传文件失败，请稍后重试！"); } if (document == null || StringUtils.isEmpty(document.getFileId())) { log.error("上传文件失败，fileName=[{}]", file.getOriginalFilename()); throw new BimdcException(HttpStatus.BAD_REQUEST.value(), "上传文件失败，请稍后重试！"); } return document; }

public Document uploadDocument(MultipartFile file, FileUploadCondition condition, String projectFolderId, String projectId) { // 初始化Document对象为null Document document = null; try { // 如果...

public Document uploadDocument(MultipartFile file, FileUploadCondition condition, String projectFolderId, String projectId) { Document document = null; try { if (StringUtils.isEmpty(condition.getFileId())) { condition.setFileId(null); } String folderId = createNewDateFolder(projectFolderId, projectId); document = documentService.breakpointUpload(file, condition.getChunkNumber(), condition.getTotalChunks(), condition.getMd5Identifier(), condition.getFileId(), folderId, null); } catch (Exception e) { log.error("上传文件失败，fileName=[{}]，错误信息：", file.getOriginalFilename(), e); throw new BimdcException(HttpStatus.BAD_REQUEST.value(), "上传文件失败，请稍后重试！"); } if (document == null || StringUtils.isEmpty(document.getFileId())) { log.error("上传文件失败，fileName=[{}]", file.getOriginalFilename()); throw new BimdcException(HttpStatus.BAD_REQUEST.value(), "上传文件失败，请稍后重试！"); } return document; }

这段代码看起来像是一个文件上传的方法，其中使用了MultipartFile来获取文件，FileUploadCondition来获取文件上传的条件，如文件分片数、md5标识等。方法会调用createNewDateFolder方法来创建一个新的日期文件夹，并...

解释一下File file = null; try { String originalFilename = multipartFile.getOriginalFilename(); String[] filename = originalFilename.split("\\."); file=File.createTempFile(filename[0], filename[1] + "."); multipartFile.transferTo(file); file.deleteOnExit(); } catch (IOException e) { e.printStackTrace(); } return file;

2. 接着，通过 multipartFile.getOriginalFilename() 方法获取文件名，然后用 String 类型的 split() 方法将文件名按照 "." 分隔成两个部分，分别为文件名和文件后缀。 3. 然后，通过 File 类的 createTempFile() ...

给下面代码添加注释：public Document breakpointUpload(@RequestPart("file") MultipartFile file, @RequestParam("chunkNumber") Integer chunkNumber, @RequestParam("totalChunks") Integer totalChunks, @RequestParam("identifier") String identifier, @RequestParam(name = "documentId",required = false) String documentId, @RequestParam(name = "folderId") String folderId, @RequestParam(name = "versionId",required = false) String versionId) { if (StringUtils.isBlank(folderId)) { throw new BimdcException(HttpStatus.BAD_REQUEST.value(), "folderId不能为空"); } else { String fileName = file.getOriginalFilename(); fileName = fileName.substring(0, fileName.lastIndexOf(".")); if (fileName.length() > this.maxFileNameLength) { throw new BimdcException(400, "【" + fileName + "】文件长度为：" + fileName.length() + "字符，已超过" + this.maxFileNameLength + "字符长度！"); } else { try { log.info("DocumentServiceImpl breakpointUpload, upfile=[{}], chunkNumber=[{}], totalChunks=[{}], identifier=[{}], documentId=[{}], folderId=[{}], versionId=[{}]", new Object[]{file.getOriginalFilename(), chunkNumber, totalChunks, identifier, documentId, folderId, versionId}); double checkFileSize = (double)file.getSize() / 1048576.0; if (checkFileSize > this.maxbreakpointUploadFileSize) { throw new BimdcException(file.getOriginalFilename() + "文件大小不能超过" + this.maxbreakpointUploadFileSize + "M！"); } else { Map<String, Object> params = new HashMap(9); params.put("chunkNumber", chunkNumber); params.put("totalChunks", totalChunks); params.put("identifier", identifier); if (null != documentId) { params.put("documentId", documentId); } if (null != folderId) { params.put("folderId", folderId); } if (null != versionId) { params.put("versionId", versionId); } String url = this.serviceUrl + "document/v1/document/document/uploadResume"; String result = this.httpMultipartFormdata.postMultipartFile(url, params, file, "upfile"); log.info("upload result = [{}]", result); Document document = new Document(); if (result.contains("code")) { JSONObject jsonObject = JSONObject.fromObject(result); if ("0".equals(jsonObject.get("code"))) { jsonObject = JSONObject.fromObject(JSONObject.fromObject(result).get("data")); document.setDocumentId(jsonObject.getString("pathMd5")); document.setFileId(jsonObject.getString("id")); document.setVersionNo(Integer.parseInt(jsonObject.getString("updateNo"))); } } return document;

public Document breakpointUpload(@RequestPart("file") MultipartFile file, @RequestParam("chunkNumber") Integer chunkNumber, @RequestParam("totalChunks") Integer totalChunks, @RequestParam(...

解释代码 @RequestMapping("/upload2") public String upload2(MultipartFile fileImage,String formid) throws IOException { System.out.println("传递过来的formid=" + formid); System.out.println("原始文件名称：" + fileImage.getOriginalFilename()); //final String imagePathRoot = "D:/00000-java/03-sprintboot/cms/src/main/resources/resources/upload/"; final String imagePathRoot = "F:/毕业设计/疫苗预约网站项目/src/main/resources/resources/upload/"; File file = new File(imagePathRoot); if (!file.exists()) { file.mkdirs(); }

该方法的参数中，MultipartFile类型的fileImage参数表示上传的文件，String类型的formid参数表示上传表单的ID。在方法体中，首先输出了传递过来的formid和原始文件名称，以便进行调试。然后，指定了上传文件保存...

@RequestMapping(value = "/image.action") //public String upload(@RequestParam(value ="image", required = false) MultipartFile file, HttpServletRequest request, ModelMap model) { public String upload( @RequestParam(value ="image", required = false) MultipartFile file, @RequestParam(value ="image1", required = false) MultipartFile file1, HttpServletRequest request, ModelMap model) { String path = request.getSession().getServletContext().getRealPath("/") + "upfiles/"; // 判断第一张图片是否为空 if (file == null) { throw new NullPointerException("第一张图片不能为空！"); } String fileName = file.getOriginalFilename(); int i = fileName.lastIndexOf("."); String name = String.valueOf(VeDate.getStringDatex()); String type = fileName.substring(i + 1); fileName = name + "." + type; File targetFile = new File(path, fileName); if (!targetFile.exists()) { targetFile.mkdirs(); } // 保存 try { file.transferTo(targetFile); } catch (Exception e) { e.printStackTrace(); } // 保存第二张图片 // 判断第二张图片是否为空 if (file1 != null && !file1.isEmpty()) { String fileName1 = file1.getOriginalFilename(); int j = fileName1.lastIndexOf("."); String name1 = String.valueOf(VeDate.getStringDatex()); String type1 = fileName1.substring(j + 1); fileName1 = name1 + "." + type1; File targetFile1 = new File(path, fileName1); if (!targetFile1.exists()) { targetFile1.mkdirs(); } try { file1.transferTo(targetFile1); } catch (Exception e) { e.printStackTrace(); } model.addAttribute("image1FileName", fileName1); } model.addAttribute("imageFileName", fileName); return "page/saveimage"; }上传第二张图片时会覆盖第一张图片文本框，该如何改写代码

public String upload(@RequestParam(value ="image", required = false) MultipartFile file, @RequestParam(value ="image1", required = false) MultipartFile file1, HttpServletRequest request, ModelMap ...

public GlobalResult uploadFile1(MultipartFile file, HttpServletRequest request) { if (file == null) { return GlobalResult.errorMsg("文件不能为空！"); } String fileSub = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf(".")).toLowerCase();请详细解释每一行代码

- public GlobalResult uploadFile1(MultipartFile file, HttpServletRequest request) {: 这是一个公共方法，返回类型为 GlobalResult，方法名为 uploadFile1，接受两个参数：MultipartFile 类型的 file ...

@RequestMapping(value = "/image.action") //public String upload(@RequestParam(value ="image", required = false) MultipartFile file, HttpServletRequest request, ModelMap model) { public String upload( @RequestParam(value ="image", required = false) MultipartFile file, @RequestParam(value ="image1", required = false) MultipartFile file1, HttpServletRequest request, ModelMap model) { String path = request.getSession().getServletContext().getRealPath("/") + "upfiles/"; String fileName = file.getOriginalFilename(); int i = fileName.lastIndexOf("."); String name = String.valueOf(VeDate.getStringDatex()); String type = fileName.substring(i + 1); fileName = name + "." + type; File targetFile = new File(path, fileName); if (!targetFile.exists()) { targetFile.mkdirs(); } // 保存 try { file.transferTo(targetFile); } catch (Exception e) { e.printStackTrace(); } model.addAttribute("imageFileName", fileName); return "page/saveimage"; }如何使image和image1有同样的效果

public String upload(@RequestParam(value = "image", required = false) MultipartFile image, @RequestParam(value = "image", required = false) MultipartFile image1, HttpServletRequest request, ...

@RequestMapping({"/upload"}) public String fileUpload0(MultipartFile[] files, HttpServletRequest request, HttpSession session) throws IOException { if (files != null && files.length > 0) { int filesTotal = files.length; String savePathRoot = request.getServletContext().getRealPath("/uploadFiles"); for(int i = 0; i < filesTotal; ++i) { FileInfo fileInfo = new FileInfo(); MultipartFile multipartFile = files[i]; if (multipartFile != null) { String originalFilename = multipartFile.getOriginalFilename(); String newFileName = CommonUtil.getNewFileName(originalFilename); String newSubDirectories = CommonUtil.getNewSubDirectoriesBasedOnNewFileName(newFileName); File filePath = new File(savePathRoot, newSubDirectories); if (!filePath.exists()) { filePath.mkdirs(); } multipartFile.transferTo(new File(filePath + "/" + newFileName)); fileInfo.setOriginalFileName(originalFilename); fileInfo.setNewFileName(newFileName); fileInfo.setSize(multipartFile.getSize()); this.fileList.add(fileInfo); } } session.setAttribute("fileList", this.fileList); session.setAttribute("uploadStatus", "OK"); } else { session.setAttribute("uploadStatus", "ERROR"); } return "redirect:toFileList"; }

这段代码使用了Spring MVC的注解 @RequestMapping，它将该方法映射到了"/upload"的URL路径上。该方法接受了三个参数：MultipartFile[] files、HttpServletRequest request和HttpSession session。其中MultipartFile...

public Message upload(String a, MultipartFile file) 后端如何传MultipartFile file值

在Java的Spring框架中，public Message upload(String a, MultipartFile file) 这样的方法通常用于处理前端上传文件的后端处理逻辑。这里的 String a 可能是一个标识符或者其他业务相关的字符串参数，而 ...

public String upload(@RequestParam("file") MultipartFile file){ //获得文件名字 String fileName=file.getOriginalFilename(); //上传失败提示 String warning=""; String newFileName = FileUtils.upload(file, path, fileName); if(newFileName != null){ //上传成功 warning="上传成功"; }else{ warning="上传失败"; } logger.info("test:{}", warning); return newFileName; }

首先，它从请求参数中获取到一个 MultipartFile 类型的文件对象。然后，通过调用 file.getOriginalFilename() 方法获得文件的原始文件名。接下来，它调用 FileUtils.upload() 方法将文件保存到指定的路径，并返回新...

//上传头像到oss @Override public String uploadFileAvatar(MultipartFile file) { String endpoint = ConstantPropertiesUtils.END_POINT; // 阿里云账号AccessKey拥有所有API的访问权限，风险很高。强烈建议您创建并使用RAM用户进行API访问或日常运维，请登录RAM控制台创建RAM用户。 String accessKeyId = ConstantPropertiesUtils.ACCESS_KEY_ID; String accessKeySecret = ConstantPropertiesUtils.ACCESS_KEY_SECRET; // 填写Bucket名称，例如examplebucket。 String bucketName = ConstantPropertiesUtils.BUCKET_NAME; System.err.println(endpoint); System.err.println(accessKeyId); System.err.println(accessKeySecret); System.err.println(bucketName); try { OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret); InputStream inputStream = file.getInputStream(); String fileName = file.getOriginalFilename(); String uuid = UUID.randomUUID().toString().replaceAll("-", ""); fileName=uuid+fileName; String dataPath = new DateTime().toString("yyyy-MM-dd"); fileName=dataPath+"/"+fileName; ossClient.putObject(bucketName, fileName, inputStream); ossClient.shutdown(); String url = "https://" + bucketName + "." + endpoint + "/" + fileName; return url; } catch (Exception e) { e.printStackTrace(); return null; } }

public String handleFileUpload(@RequestParam("file") MultipartFile file) { // 处理上传的文件 } 如果您的问题是MultipartFile无法上传到OSS，请确保您的OSS配置是正确的，特别是访问密钥和终端节点。另外...

上传/下载文件 <form method="post" action="/file/upload" enctype="multipart/form-data"> <input type="file" name="file" id="fileInput"/> <input type="submit" value="上传" /> </form>
<form method="post" action="/file/download" > <input type="text" name="fileName" placeholder="请输入文件名" /> <input type="submit" value="下载" id="downloadBtn" /> </form> public class SFTPUtil { private static final String host = "10.60.0.160"; private static final int port = 22; private static final String username = "root"; private static final String password = "Z20"; private static Session session = null; public static void connect() throws Exception { } public static void upload(MultipartFile file, String path, String fileName) throws Exception { } public static boolean download(HttpServletResponse response, String path, String fileName) throws Exception { } @Controller @RequestMapping("/file") public class FileController { private static final String UPLOAD_PATH = "/data/sftp/adtuser1/upload/winbidding/"; private static final String DOWNLOAD_PATH = "/data/sftp/adtuser1/upload/winbidding/"; @PostMapping("/upload") @ResponseBody public ModelAndView upload(@RequestParam("file") MultipartFile file) { } @PostMapping("/download") public ModelAndView download(@RequestParam("fileName") String fileName, HttpServletResponse response) throws Exception { } 数据库有host port username password UPLOAD_PATH DOWNLOAD_PATH csmc字段，把上边写死的改成数据库查询，前台页面增加csmc字段下拉框，根据csmc字段把查出来的配置数据完成上传下载功能，用的mysql数据库，把代码改好写出来

public String upload(@RequestParam("file") MultipartFile file, @RequestParam("csmc") String csmc) { try { // 从数据库中获取SFTP连接配置信息 String sql = "SELECT * FROM sftp_config WHERE csmc = ?";...

@RequestMapping(value = "/files.action") public String files( @RequestParam(value ="image", required = false) MultipartFile file, @RequestParam(value ="image1", required = false) MultipartFile file1, HttpServletRequest request, ModelMap model) { String path = request.getSession().getServletContext().getRealPath("/") + "upfiles/"; String fileName = file.getOriginalFilename(); int i = fileName.lastIndexOf("."); String name = String.valueOf(VeDate.getStringDatex()); String type = fileName.substring(i + 1); fileName = name + "." + type; File targetFile = new File(path, fileName); if (!targetFile.exists()) { targetFile.mkdirs(); } // 保存 try { file.transferTo(targetFile); } catch (Exception e) { e.printStackTrace(); } model.addAttribute("imageFileName", fileName); return "page/savefile"; }如何使参数image和image1有一样的效果

public String files(@RequestParam(value ="file", required = false) MultipartFile[] files, HttpServletRequest request, ModelMap model) { String path = request.getSession().getServletContext()....

@RequestMapping(value = "/files.action") public String files( @RequestParam(value ="image", required = false) MultipartFile file, @RequestParam(value ="image1", required = false) MultipartFile file1, HttpServletRequest request, ModelMap model) { String path = request.getSession().getServletContext().getRealPath("/") + "upfiles/"; String fileName = file.getOriginalFilename(); int i = fileName.lastIndexOf("."); String name = String.valueOf(VeDate.getStringDatex()); String type = fileName.substring(i + 1); fileName = name + "." + type; File targetFile = new File(path, fileName); if (!targetFile.exists()) { targetFile.mkdirs(); } // 保存 try { file.transferTo(targetFile); } catch (Exception e) { e.printStackTrace(); } model.addAttribute("imageFileName", fileName); return "page/savefile"; }如何使两个参数image和image1有相同的效果

@RequestParam(value = {"image", "image1"}, required = false) MultipartFile[] files 这样就可以同时接收两个参数，且效果相同。在方法内部，你需要遍历这个数组，然后分别处理每个文件。

@RequestMapping(value = "/image.action") public String upload( @RequestParam(value ="image", required = false) MultipartFile file, @RequestParam(value ="image1", required = false) MultipartFile file1, HttpServletRequest request, ModelMap model) { String path = request.getSession().getServletContext().getRealPath("/") + "upfiles/"; String fileName = file.getOriginalFilename(); int i = fileName.lastIndexOf("."); String name = String.valueOf(VeDate.getStringDatex()); String type = fileName.substring(i + 1); fileName = name + "." + type; File targetFile = new File(path, fileName); if (!targetFile.exists()) { targetFile.mkdirs(); } // 保存第一张图片 try { file.transferTo(targetFile); } catch (Exception e) { e.printStackTrace(); } // 保存第二张图片 String fileName1 = file1.getOriginalFilename(); int j = fileName1.lastIndexOf("."); String name1 = String.valueOf(VeDate.getStringDatex()); String type1 = fileName1.substring(j + 1); fileName1 = name1 + "." + type1; File targetFile1 = new File(path, fileName1); if (!targetFile1.exists()) { targetFile1.mkdirs(); } try { file1.transferTo(targetFile1); } catch (Exception e) { e.printStackTrace(); } model.addAttribute("imageFileName", fileName); model.addAttribute("image1FileName", fileName1); return "page/saveimage"; }如何添加判断空指针异常的代码

public String upload(@RequestParam(value ="image", required = false) MultipartFile file, @RequestParam(value ="image1", required = false) MultipartFile file1, HttpServletRequest request, ModelMap ...

逐行解释代码@RequestMapping("/uploadExcel") public String uploadExcel(@RequestParam("file") MultipartFile file, ModelMap map) { String name = file.getOriginalFilename(); if(!name.substring(name.length() - 5).equals(".xlsx")) { map.put("msg", "文件格式错误"); } List<Leimu> list; try { list=ExcelImportUtils.excelToFoodLeimuList(file.getInputStream()); log.info("excel导入的list={}", list); if (list == null || list.size() <= 0) {...}

@RequestParam("file") MultipartFile file表示接收一个名为file的文件参数，并将其转换为MultipartFile类型。接下来的代码首先获取上传文件的原始文件名，并判断其是否以“.xlsx”结尾，如果不是则在ModelMap中...

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