生成二维码并下载

刘嘉先
java
下载, 二维码
阅读量
文章目录
  1. 1. 主要代码
  2. 2. 生成二维码类和jar包下载

公司有个需求需要生成，下载二维码，供扫码快速完成操作。

主要代码

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/**
    * 生成，下载二维码
    *
    * @param aoData
    * @return
    */
   @RequestMapping("load")
   public void load(String fromWhere, String url, HttpServletResponse response, HttpServletRequest request, HttpSession session) throws IOException {
       BufferedInputStream dis = null;
       BufferedOutputStream fos = null;
       try {
           UUID uuid = UUID.randomUUID();
           //response.setContentType("application/x-msdownload;");
           String fileName = uuid+".jpg";
           String content = url + "?fromWhere=" + fromWhere;
           //获取文件的路径
           String ccbPath = session.getServletContext().getRealPath("/") + "assets/images/logo.png" ;
           System.out.println(ccbPath);
           InputStream qrcode = EncoderHandler.encoderQRCoder(content, ccbPath);
           response.setContentType("image/png");
           response.setHeader("Content-disposition", "attachment; filename=" + new String(fileName.getBytes("utf-8"), "ISO8859-1"));
           byte[] byt = new byte[qrcode.available()];
           response.setHeader("Content-Length", String.valueOf(byt.length));
           dis = new BufferedInputStream(qrcode);
           fos = new BufferedOutputStream(response.getOutputStream());

           byte[] buff = new byte[2048];
           int bytesRead;
           while (-1 != (bytesRead = dis.read(buff, 0, buff.length))) {
               fos.write(buff, 0, bytesRead);
           }

       } catch (Exception e) {
           e.printStackTrace();
       } finally {
           if (dis != null)
               dis.close();
           if (fos != null)
               fos.close();
       }
   }

生成二维码类和jar包下载

[upl-file uuid=9ee7b502-44cc-4612-bb78-f128a3119625 size=1MB]qrcode-tools.zip[/upl-file]

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