由于HttpServletRequest不能直接取出文件数据，所以将其强制转换为MultipartHttpServletRequest
MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
List<MultipartFile> files = multipartRequest.getFiles("files");
POST
/*提交表单*/ function myupload() { $.ajax({ url:"/exUploadController.do?uploadTest", type : "POST", async: false, cache: false, //此处设置false contentType: false,//必须设置false ,formupload1表单中必须设置enctype="multipart/form-data" processData: false, //必须设置fals data :new FormData(document.getElementById("myForm")), success:function (data) { alert(data); }, error:function (XMLHttpRequest, textStatus, errorThrown) { console.log(XMLHttpRequest); console.log(textStatus); console.log(errorThrown); } }) }
Servlet
HttpServletRequest request; //获取上传图片 MultipartHttpServletRequest mureq = (MultipartHttpServletRequest) request; Map<String, MultipartFile> files = mureq.getFileMap(); MultipartFile file =null; if (files != null &&files.size()> 0) { Map.Entry<String, MultipartFile> f = files.entrySet().iterator().next(); file = f.getValue(); } //获取项目部署的路径 String rootPath = request.getSession().getServletContext().getRealPath("https://www.jb51.net/"); //获取上传图片的名称 String fileName = file.getOriginalFilename(); //获取上传图片的大小 float size = file.getSize() //在path路径下创建一个文件 File newFile = new File(path); //判断文件是否存在 if(!newFile.exists()) { newFile.mkdirs();//不存在的话，就开辟一个空间 } //将上传的文件存储 file.transferTo(newFile);