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)

@RequestMapping("/download/{fileName}")
    public ModelAndView download(@PathVariable("fileName")
    String fileName, HttpServletRequest request, HttpServletResponse response)
            throws Exception {

        response.setContentType("text/html;charset=utf-8");
        request.setCharacterEncoding("UTF-8");
        java.io.BufferedInputStream bis = null;
        java.io.BufferedOutputStream bos = null;

        String ctxPath = request.getSession().getServletContext().getRealPath(
                "/")
                + "\\" + "images\\";
        String downLoadPath = ctxPath + fileName;
        System.out.println(downLoadPath);
        try {
            long fileLength = new File(downLoadPath).length();
            response.setContentType("application/x-msdownload;");
            response.setHeader("Content-disposition", "attachment; filename="
                    + new String(fileName.getBytes("utf-8"), "ISO8859-1"));
            response.setHeader("Content-Length", String.valueOf(fileLength));
            bis = new BufferedInputStream(new FileInputStream(downLoadPath));
            bos = new BufferedOutputStream(response.getOutputStream());
            byte[] buff = new byte[2048];
            int bytesRead;
            while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
                bos.write(buff, 0, bytesRead);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (bis != null)
                bis.close();
            if (bos != null)
                bos.close();
        }
        return null;
    }
}