Springmvc文件上传与下载

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