图片/视频上传（超简单教程）

#应用场景#

该后端开发接口适用图片/视频上传，返回路径名称场景

1.视频上传

写在Controller层

这里只是一个接收，调用uploadObject方法上传oss

java">public OmsResult<FileUploadDto> goodsUploadVideo(@RequestParam(value = "file") MultipartFile multipartFile, HttpServletRequest request, HttpServletResponse response) {FileUploadDto fileUploadDto = new FileUploadDto();if (null == multipartFile) {return OmsResult.error("文件传输格式错误");}String originalFilename = multipartFile.getOriginalFilename();if (StringUtil.isEmpty(originalFilename)) {return OmsResult.error("文件名缺失");}if (originalFilename != null) {// 校验文件扩展名if (!checkFormatVideo(originalFilename)) {return OmsResult.error("仅支持mp4, mov, m4v, flv, x-flv, mkv, wmv, avi格式");}// 校验文件大小if (multipartFile.getSize() > FileSizeConstant.FILE_20MB) {return OmsResult.error("文件大小不得超过20MB");}try {String[] split = originalFilename.split("\\.");// 拼接上传文件名GV+当前时间（24小时）+随机数String fileName = "GV" + "当前时间" + randomLetterGenerator() + "." + split[1];// 获取文件输入流InputStream inputStream = multipartFile.getInputStream();//上传文件到OSS//这行代码调用ossClient对象的uploadObject2OSS4SimplePathByIn方法，将文件上传到OSS。其中，inputStream是文件输入流，fileName是文件名，GV是文件在OSS中的存储路径前缀String url = ossClient.uploadObject(inputStream, fileName, "GV");log.info("goodsUploadVideo URL:{}", url);fileUploadDto.setFileUrl(fileName);fileUploadDto.setVideoSize(String.valueOf(multipartFile.getSize()));return OmsResult.success(fileUploadDto);} catch (Exception e) {log.error("goodsUploadVideo Error", e);return OmsResult.error("上传文件失败");}

java">    /*** 随机生成4位大写英文字母* @return*/private String randomLetterGenerator() {SecureRandom random = new SecureRandom();StringBuilder randomLetters = new StringBuilder();for (int i = 0; i < 4; i++) {int index = random.nextInt(26);char letter = (char) ('a' + index);randomLetters.append(letter);}return randomLetters.toString();}

后缀校验

java">private boolean checkFormatVideo(String originalFilename) {if (StringUtil.isEmpty(originalFilename)) {return false;}String s = originalFilename.toLowerCase();//需要什么自己加后缀return s.endsWith(".mp4") || s.endsWith(".mov") || s.endsWith(".m4v") || s.endsWith(".flv")|| s.endsWith(".x-flv") || s.endsWith(".mkv") || s.endsWith(".wmv") || s.endsWith(".avi");}

⭐最后说下uploadObject这个方法

这部分一般公司都有公共的轮子

java">public String uploadObject(InputStream in, String fileName, String folder, String... bucketName) {if (StringUtils.isEmpty(folder)) {folder = "";}String bucketNameTmp = this.bucketName;if (bucketName != null && bucketName.length > 0) {bucketNameTmp = bucketName[0];}String url = null;try {ObjectMetadata metadata = new ObjectMetadata();metadata.setContentLength((long)in.available());metadata.setCacheControl("no-cache");metadata.setHeader("Pragma", "no-cache");metadata.setContentEncoding("utf-8");metadata.setContentType(this.getContentType(fileName));metadata.setContentDisposition("filename/filesize=" + fileName);PutObjectResult putResult = this.ossClientConfig.putObject(bucketNameTmp, folder + fileName, in, metadata);String resultStr = putResult.getETag();if (StringUtils.isNotEmpty(resultStr)) {url = folder + fileName;}} catch (Exception var10) {var10.printStackTrace();log.error("上传阿里云OSS服务器异常." + var10.getMessage(), var10);}return url;}

这个是用于将文件上传到阿里云对象存储服务（OSS）的Java方法

使用ossClientConfig对象的putObject方法执行上传操作。这个方法需要存储桶名称、文件路径（文件夹+文件名）、输入流和元数据信息。
从PutObjectResult对象中获取ETag（一个代表文件内容的哈希值），并检查它是否为空。如果不为空，则设置url为上传文件的路径（文件夹+文件名）。
如果在上传过程中发生异常，则捕获该异常并打印堆栈跟踪，并记录错误日志。

前端vue逻辑和oss方法可以参考一下这篇文章

http://t.csdnimg.cn/2yaig

2.图片上传

controller逻辑

java">public void uploadImportFile(@RequestParam("fileImport") MultipartFile fileImport, HttpServletRequest request, HttpServletResponse response) {JSONObject result = new JSONObject();BufferedInputStream in = null;try {// 上传文件类型 1商贸店铺申请附件 2商贸店铺LOGO附件 3其他String fileType = request.getParameter("fileType");if (null == fileImport || StringUtils.isBlank(fileImport.getOriginalFilename())) {result.put(ResponseConstant.RESPONSE_CODE, "400");result.put(ResponseConstant.RESPONSE_MSG, "上传的文件为空，请重新上传");this.writeData(result, response);return;}String fileName = fileImport.getOriginalFilename();// 判断文件大小if ("1".equals(fileType) || "2".equals(fileType)) {if("1".equals(fileType)){if (fileImport.getSize() > FileSizeConstant.FILE_1MB) {result.put(ResponseConstant.RESPONSE_CODE, "400");result.put(ResponseConstant.RESPONSE_MSG, "当前上传的文件过大，大小不能超出1M");this.writeData(result, response);return;}} else if ("2".equals(fileType) && fileImport.getSize() > FileSizeConstant.FILE_20MB) {result.put(ResponseConstant.RESPONSE_CODE, "400");result.put(ResponseConstant.RESPONSE_MSG, "当前上传的文件过大，大小不能超出20M");if (!fileName.endsWith(".png") && !fileName.endsWith(".jpeg") && !fileName.endsWith(".jpg")) {result.put(ResponseConstant.RESPONSE_CODE, "400");result.put(ResponseConstant.RESPONSE_MSG, "上传的文件类型错误，请重新上传，只支持png、jpeg、jpg格式文件");this.writeData(result, response);return;}} else {if (fileImport.getSize() > FileSizeConstant.FILE_32MB) {result.put(ResponseConstant.RESPONSE_CODE, "400");result.put(ResponseConstant.RESPONSE_MSG, "当前上传的文件过大，大小不能超出32M");this.writeData(result, response);return;}if (!fileName.endsWith(".xls") && !fileName.endsWith(".xlsx")&& !fileName.endsWith(".pdf") && !fileName.endsWith(".png") && !fileName.endsWith(".jpeg") && !fileName.endsWith(".jpg")&& !fileName.endsWith(".rar") && !fileName.endsWith(".zip")) {result.put(ResponseConstant.RESPONSE_CODE, "400");result.put(ResponseConstant.RESPONSE_MSG, "上传的文件类型错误，请重新上传，pdf、png、jpeg、jpg、xls、xlsx、rar、zip");this.writeData(result, response);return;}}
//上传文件的时间String uploadTime = DateUtils.getToday("yyyyMMddHHmmssSSS") + SaltUtil.getRandom();String fileNameNew = uploadTime + SaltUtil.randomGenerate() + fileName.substring(fileName.lastIndexOf("."));in = new BufferedInputStream(fileImport.getInputStream());String url = ossClient.uploadObject(in, fileNameNew, null);if (StringUtils.isNotBlank(url)) {result.put(ResponseConstant.RESPONSE_CODE, "200");result.put(ResponseConstant.RESPONSE_MSG, "上传成功");result.put("data", url);this.writeData(result, response);} else {result.put(ResponseConstant.RESPONSE_CODE, "400");result.put(ResponseConstant.RESPONSE_MSG, "上传失败，请重新上传");this.writeData(result, response);}} catch (Exception e) {log.error("上传文件异常:{}", e);result.put(ResponseConstant.RESPONSE_CODE, "500");result.put(ResponseConstant.RESPONSE_MSG, "系统繁忙，请稍后重试");this.writeData(result, response);} finally {IOUtils.closeQuietly(in);}}