1 @Log("INFO")
 2 @RequestMapping("/downloadXXXTemplate")
 3 public void downloadXXXTemplate(HttpServletRequest req, HttpServletResponse resp) throws Exception {
 4     String fileName = "XXXTemplate.xlsx".toString();
 5     InputStream inStream = req.getSession().getServletContext().getResourceAsStream("/WEB-INF/classes/XXXTemplate.xlsx");
 6     // InputStream inStream = req.getServletContext().getResourceAsStream("/WEB-INF/classes/ccar14a/IndicatorTemplate.xlsx");
 7     // ServletRequest.getServletContext() method is introduced in Servlet 3.0, not 2.3.
 8     // Need a Servlet 3.0 compatible container such as Tomcat 7, Glassfish 3, etc in Eclipse and set the Target Runtime of your Dynamic Web Project to that container. 
 9     resp.reset();
10     resp.setContentType("bin");
11     resp.addHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\"");
12     byte[] b = new byte[100];
13     int len;
14     try {
15         while ((len = inStream.read(b)) > 0)
16             resp.getOutputStream().write(b, 0, len);
17         inStream.close();
18     } catch (IOException e) {
19         e.printStackTrace();
20     }
21 }