文件上传下载

1. 获取resources文件在浏览器下载

        try {
            ClassPathResource classPathResource = new ClassPathResource("static/企业因子管理模板.xlsx");
            File file = classPathResource.getFile();
            InputStream inputStream = classPathResource.getInputStream();
            //输出文件
            InputStream fis = new BufferedInputStream(inputStream);
            byte[] buffer = new byte[fis.available()];
            fis.read(buffer);
            fis.close();
            response.reset();
            //获取文件的名字再浏览器下载页面
            String name = file.getName();
            response.addHeader("Content-Disposition", "attachment;filename=" + new String(name.getBytes(), "iso-8859-1"));
            response.addHeader("Content-Length", "" + file.length());
            OutputStream out = new BufferedOutputStream(response.getOutputStream());
            response.setContentType("application/octet-stream");
            out.write(buffer);
            out.flush();
            out.close();
        } catch (Exception e) {
            e.printStackTrace();
        }