Java 批量生成二维码图片，并在页面打包成可直接下载的zip包

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一、描述

前言：在页面点击按钮通过后端生成二维码并下载到本地。(并且可以批量下载)

请求方式：GET

请求参数：String ids

响应内容：zip文件流

二、代码实现

1.引入包：

        <!-- 二维码相关依赖 --><dependency><groupId>com.google.zxing</groupId><artifactId>core</artifactId><version>3.3.3</version></dependency><!-- 二维码相关依赖 --><dependency><groupId>com.google.zxing</groupId><artifactId>javase</artifactId><version>3.3.3</version></dependency>

2.Controller控制层

/*** 二维码生成并下载* @param request* @param response* @param ids* @throws Exception*/@GetMapping(value = "/qrcode")public void qrcode(HttpServletRequest request, HttpServletResponse response,String ids) throws Exception {liuyiScenesInfoService.downloadAllQr(request, response,ids);}

3.Serivce层

//二维码生成
void downloadAllQr(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse,String ids) throws WriterException, IOException;

4.ServiceImpl层

@Overridepublic void downloadAllQr(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse,String ids)throws WriterException, IOException {httpServletResponse.setContentType("application/zip");String fileName = "奇境留亿场景二维码.zip";String encodedFileName = new String(fileName.getBytes("UTF-8"), "ISO8859-1");httpServletResponse.setHeader("Content-disposition", "attachment; filename="+encodedFileName);OutputStream outputStream = httpServletResponse.getOutputStream();ZipOutputStream zipOutputStream = new ZipOutputStream(outputStream);List<LiuyiScenesInfo> scenesInfoList = liuyiScenesInfoMapper.selectBatchIds(Arrays.asList(ids.split(",")));for (LiuyiScenesInfo liuyiScenesInfo : scenesInfoList) {//扫码后的地址BitMatrix bitMatrix = new MultiFormatWriter().encode("http://www.baidu.com", BarcodeFormat.QR_CODE, 300, 300);BufferedImage buffImg = MatrixToImageWriter.toBufferedImage(bitMatrix);//二维码图片名称ZipEntry entry = new ZipEntry(liuyiScenesInfo.getSampleText()+".png");zipOutputStream.putNextEntry(entry);//图片格式ImageIO.write(buffImg, "png", zipOutputStream);zipOutputStream.flush();}zipOutputStream.close();outputStream.flush();outputStream.close();}