基于HTML5+js+Java实现单文件文件上传到服务器功能

 <form name="upform" action="" method="POST">            <input type ="file" name="myfile1" id="myfile1"/><br/>            <input type ="file" name="myfile2" id="myfile2"/><br/>               备注：<input type="text" name="mydata" id="mydata"/><br/>           <input type="button" value="确定" onclick="upload()"/><br/>  </form> 

function upload() {  mydata = document.getElementById("mydata").files[0];  formData = new FormData();  formData.append("mydata", mydata);   $.ajax({        contentType:"multipart/form-data",        url:"/adata/adata/payment/PaymentAction/upload.menu?_pathName=/adata//payment.jsp",        type:"POST",        data:formData,        dataType:"text",        processData: false, // 告诉jQuery不要去处理发送的数据        contentType: false, // 告诉jQuery不要去设置Content-Type请求头        success: function(result){        alert(result);  }  }); }

String savePath = "d:/";//存储路径       String retMsg = "";//定义将返回给客户端的信息       try {         if (ServletFileUpload.isMultipartContent(request)) {           List<FileItem> items = new ServletFileUpload(new DiskFileItemFactory()).parseRequest(request);           for (FileItem item : items) {             if (!item.isFormField()) {// 过滤掉表单中非文件域               String fileType = item.getName().substring(item.getName().lastIndexOf(".") + 1).toLowerCase();//文件类型               String fileName = new Date().getTime() + "." + fileType; //保存的文件名               String filePath = savePath + "//" + fileName; //保存的文件路径               BufferedInputStream in = new BufferedInputStream(item.getInputStream());// 获得文件输入流               BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(new File(filePath)));// 获得文件输出流               org.apache.commons.fileupload.util.Streams.copy(in, out, true);// 开始把文件写到指定的上传文件夹               retMsg += "上传文件成功！";               in.close();               out.close();             }            }         }         response.setContentType("text/html;charset=utf8");         PrintWriter pw = response.getWriter();         pw.print(retMsg);         pw.flush();         pw.close();         //根据自己需要返回页面一个 retMsg　　　　　　　　　//　return retMsg 证明上传成功      } catch (Exception e) {         e.printStackTrace();       }