下载工程中模板到浏览器

 public void downPersonImportTemplate(HttpServletRequest request, HttpServletResponse response) throws IOException {
        // 获取需要下载文件名称
        String filename = "personImportTemplate.xls";
        // 获取下载的类型
        response.setContentType(request.getServletContext().getMimeType(filename));
        // 告知客户端需要下载
        response.setHeader("Content-Disposition", "attachment;filename=" + filename);
        // 获取文件的输入源
        InputStream in = new BufferedInputStream(this.getClass().getResourceAsStream("/xlsTemplate/personImport.xls"));
        // 获取输出流
        ServletOutputStream out = response.getOutputStream();
        // 写出
        int len = 0;
        byte[] buffer = new byte[1024];
        while ((len = in.read(buffer)) > 0) {
            out.write(buffer, 0, len);
        }
        in.close();
        out.close();
    }