（上传）

１.jar包与springmvc.xml

将request包装成MultipartHttpServletRequest.

2.页面

注意method为post

3.action

  方法一解析(request)

方法二(参数)

(下载)

1. @RequestMapping("/download/{fileName}")  
2.     public ModelAndView download(@PathVariable("fileName")  
3.     String fileName, HttpServletRequest request, HttpServletResponse response)  
4.             throws Exception {  
5.   
6.         response.setContentType("text/html;charset=utf-8");  
7.         request.setCharacterEncoding("UTF-8");  
8.         java.io.BufferedInputStream bis = null;  
9.         java.io.BufferedOutputStream bos = null;  
10.   
11.         String ctxPath = request.getSession().getServletContext().getRealPath(  
12.                 "/")  
13.                 + "\\" + "images\\";  
14.         String downLoadPath = ctxPath + fileName;  
15.         System.out.println(downLoadPath);  
16.         try {  
17.             long fileLength = new File(downLoadPath).length();  
18.             response.setContentType("application/x-msdownload;");  
19.             response.setHeader("Content-disposition", "attachment; filename="  
20.                     + new String(fileName.getBytes("utf-8"), "ISO8859-1"));  
21.             response.setHeader("Content-Length", String.valueOf(fileLength));  
22.             bis = new BufferedInputStream(new FileInputStream(downLoadPath));  
23.             bos = new BufferedOutputStream(response.getOutputStream());  
24.             byte[] buff = new byte[2048];  
25.             int bytesRead;  
26.             while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {  
27.                 bos.write(buff, 0, bytesRead);  
28.             }  
29.         } catch (Exception e) {  
30.             e.printStackTrace();  
31.         } finally {  
32.             if (bis != null)  
33.                 bis.close();  
34.             if (bos != null)  
35.                 bos.close();  
36.         }  
37.         return null;  
38.     }  
39. }  

Springmvc文件上传与下载