axios实现简单文件上传功能

引入axios js文件

<script src="https://unpkg.com/axios/dist/axios.min.js"></script>

HTML:

<input type="file"/> <br> <span οnclick="upload()">上传图片</span>

JS:

function upload() { alert("上传") let file = document.getElementsByName('img')[0].files[0]; let formData = new FormData(); formData.append("uploadFile",file,file.name); const config = { headers: { "Content-Type": "multipart/form-data;boundary="+new Date().getTime() } }; axios .post("/file/upload",formData,config) .then(function (response) { console.log(response); }) .catch(function (error) { console.log(error); }); }

后台接收：

@PostMapping(value = "/upload") public String upload(HttpServletRequest request){ logger.info("开始上传……"); MultipartHttpServletRequest servletRequest = (MultipartHttpServletRequest) request; Map<String, MultipartFile> fileMap = servletRequest.getFileMap(); for (Map.Entry entry : fileMap.entrySet()) { logger.info("name : {}",entry.getKey()); MultipartFile multipartFile = (MultipartFile) entry.getValue(); try { FileUtil.writeFile(multipartFile.getInputStream(),path+"/12_"+multipartFile.getOriginalFilename()); } catch (IOException e) { e.printStackTrace(); } } return "{'result':'OK'}"; } @RequestMapping(value = "/uploadII") public String uploadII(@RequestParam("uploadFile") MultipartFile uploadFile){ logger.info("upload : {}",uploadFile); try { InputStream inputStream = uploadFile.getInputStream(); String originalFilename = uploadFile.getOriginalFilename(); logger.info("file : {}",originalFilename); FileUtil.writeFile(inputStream,path+"https://www.jb51.net/"+originalFilename); } catch (IOException e) { e.printStackTrace(); } return "{'result':'OK'}"; }

pox.xml:

<!-- 文件上传 --> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3</version> </dependency>

注入CommonsMultipartResolver:

@Bean public CommonsMultipartResolver initCommonsMultipartResolver(){ CommonsMultipartResolver resolver = new CommonsMultipartResolver(); resolver.setMaxUploadSize(104857600); resolver.setMaxInMemorySize(4096); return resolver; }