一、简介
使用form表单进行需要为form添加enctype="multipart/form-data" 属性，除此之外还需要将表单的提交方法改成post,如下 method="post"。
二、示例
1、表单文件上传
网页代码如下：
1 <!DOCTYPE html>
2 <html>
3 <head>
4 </head>
5 <body>
6 <form action="${pageContext.request.contextPath}/file/upload.action" method="post" enctype="multipart/form-data">
7 <div id="contentTable" style="border: 0px;">
8 <h1 class="title" style="font-size: 15px; border-bottom: 1px solid #DFE3E6;">导入数据</h1>
9 <table width="80%">
10 <tr>
11 <td width="20%"align="right">
12 选择要上传的文件
13 </td>
14 <td width="70%" id="name_h" title="" style="text-align: center;">
15 <input type="file" name="xlsfile" id="xlsfile" />
16 </td>
17 </tr>
18 </table>
19 <div id="activityTable">
20 <input id="btnSave" type="submit" value="导 入" />
21 </div>
22 </div>
23 </form>
24 </body>
25 </html>
后端上传处理代码：
1 /**
2 *使用springmvc处理文件上传
3 */
4 @RequestMapping("upload")
5 @ResponseBody
6 public boolean upload(HttpServletRequest request, HttpServletResponse response, HttpSession session) throws UnsupportedEncodingException {
7 String path = request.getSession().getServletContext().getRealPath("");
8 Calendar calendar = Calendar.getInstance();
9 calendar.setTime(new Date());
10 request.setCharacterEncoding("UTF-8");
11 path = String.format("%s%s%s\\%s\\%s\\%s", path, "upload", "file", calendar.get(calendar.YEAR),
12 calendar.get(calendar.MONTH), calendar.get(calendar.DAY_OF_MONTH));
13 File filepath = new File(path);
14 if (!filepath.exists()) {
15 filepath.mkdirs();
16 }
17 MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
18 获得文件
19 MultipartFile multipartFile = multipartRequest.getFile("xlsfile");
20 OutputStream os = null;
21 InputStream is = null;
22 File uploadFile = null;
23 try {
24 is = multipartFile.getInputStream();
25 uploadFile = new File(filepath, System.currentTimeMillis() + ".xls");
26 os = new FileOutputStream(uploadFile);
27 IOUtils.copy(is, os);//使用commons-io组件进行文件流的处理
28 os.flush();
29 } catch (IOException e) {
30 e.printStackTrace();
31 return false;
32 }finally{
33 IOUtils.closeQuietly(os);
34 IOUtils.closeQuietly(is);
35 }
36 return true;
37 }
2、文件下载
1 /**
2 *使用springmvc进行文件下载处理
3 */
4 @RequestMapping({ "/template" })
5 public void downloadTemplate(HttpServletRequest request, HttpServletResponse response)
6 throws UnsupportedEncodingException {
7 String path = request.getSession().getServletContext().getRealPath("");
8 String filename = "模板文件.xls";
9 File file = new File(path + "\\file\\templagte\\" + filename);
10 String userAgent = request.getHeader("User-Agent");
11 byte[] bytes = userAgent.contains("MSIE") ? filename.getBytes() : filename.getBytes("UTF-8"); // fileName.getBytes("UTF-8")处理safari的乱码问题
12 String fileName = new String(bytes, "ISO-8859-1");
13 // 设置输出的格式
14 response.setContentType("multipart/form-data");
15 response.setHeader("Content-Disposition", "attachment;fileName=" + fileName);
16
17 InputStream inStream = null;
18 try {
19 inStream = new FileInputStream(file);
20 IOUtils.copy(inStream, response.getOutputStream());//使用commons-io组件进行文件流的处理
21 } catch (IOException e) {
22 e.printStackTrace();
23 }finally{
24 IOUtils.closeQuietly(inStream);
25 }
时间： 2024-08-06 23:47:11