@RequestMapping(value = "/downloadAndroid")
@ResponseBody
public void downloadAndroid(HttpServletResponse response, HttpServletRequest request){HashMap<String, String> paramsMap = QueryToolUtil.queryUtil(request);String saasId = request.getParameter("saasId");String businessType = request.getParameter("businessType");String apkPath = this.getClass().getClassLoader().getResource("/").getPath()+"/appdownload/app-release.apk";//要下载文件的相对位置//new 一个apk的文件对象File file = new File(apkPath);try {if(file.exists()){// 以流的形式下载文件//先以输入流把文件输入到buffer中，再以输出流的形式输出InputStream fis = new BufferedInputStream(new FileInputStream(apkPath));byte[] buffer = new byte[fis.available()];fis.read(buffer);fis.close();// 清空responseresponse.reset();// 设置response的Headerresponse.setHeader("content-type", "application/vnd.android.package-archive");response.addHeader("Content-Disposition", "attachment;filename=" + file.getName());response.addHeader("Content-Length", "" + file.length());OutputStream toClient = new BufferedOutputStream(response.getOutputStream());response.setContentType("application/octet-stream");toClient.write(buffer);toClient.flush();toClient.close();}}catch(Exception e) {System.out.println("下载文件错误"+e.getMessage());}
}

@RequestMapping(value = "/downloadExample")
@ResponseBody
public void downloadExample(HttpServletResponse response, HttpServletRequest request){String path = Thread.currentThread().getContextClassLoader().getResource("").getPath() + "//template//cashloanicon.zip";File file = new File(path);try {// 以流的形式下载文件。InputStream fis = new BufferedInputStream(new FileInputStream(path));byte[] buffer = new byte[fis.available()];fis.read(buffer);fis.close();// 清空responseresponse.reset();OutputStream toClient = new BufferedOutputStream(response.getOutputStream());response.setContentType("application/octet-stream");//如果输出的是中文名的文件，在此处就要用URLEncoder.encode方法进行处理response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode("个人小额借贷示例.zip", "UTF-8"));toClient.write(buffer);toClient.flush();toClient.close();} catch (IOException ex) {ex.printStackTrace();} finally {try {File f = new File(file.getPath());} catch (Exception e) {e.printStackTrace();}}
}

@RequestMapping(value="/createCodeAndUpload",method= RequestMethod.POST)
@ResponseBody
public JsonResult createCodeAndUpload(HttpServletRequest request){String url = request.getParameter("url");String path = FileSystemView.getFileSystemView().getHomeDirectory() + File.separator + "testQrcode";String fileName = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date()) + ".jpg";final int BLACK = 0xFF000000;final int WHITE = 0xFFFFFFFF;File file = null;try {Map<EncodeHintType, String> hints = new HashMap<>();hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");BitMatrix bitMatrix = new MultiFormatWriter().encode(url, BarcodeFormat.QR_CODE, 400, 400, hints);file = new File(path, fileName);if (file.exists() || ((file.getParentFile().exists() || file.getParentFile().mkdirs()) && file.createNewFile())) {int width = bitMatrix.getWidth();int height = bitMatrix.getHeight();BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);for (int x = 0; x < width; x++) {for (int y = 0; y < height; y++) {image.setRGB(x, y, bitMatrix.get(x, y) ? BLACK : WHITE);}}if (!ImageIO.write(image, "jpg", file)) {throw new IOException("Could not write an image of format " + "jpg" + " to " + file);}System.out.println("搞定：" + file);}} catch (Exception e) {e.printStackTrace();}if(file == null){return new JsonResult().setMsg("生成二维码失败，请稍后重试！").setSuccess(false);}
}