springboot+hutool批量生成二维码压缩导出功能
目录
- 1.引入依赖
- 2.测试编码
- 3.批量生成
- 4.解析excel
- 5.批量图片压缩
- 6.上传excel直接将输出流转成压缩包
1.引入依赖
<!-- 生成二维码依赖--> <dependency> <groupId>com.google.zxing</groupId> <artifactId>core</artifactId> <version>3.4.1</version> </dependency> <!-- 工具包--> <dependency> <groupId>cn.hutool</groupId> <artifactId>hutool-all</artifactId> <version>5.7.14</version> </dependency>
2.测试编码
QrConfig config = new QrConfig(300, 300); // 设置边距,既二维码和背景之间的边距 config.setMargin(3); // 设置前景色,既二维码颜色(青色) config.setForeColor(Color.CYAN); // 设置背景色(灰色) config.setBackColor(Color.GRAY); // 生成二维码到文件,也可以到流 QrCodeUtil.generate("12345678", config, FileUtil.file("E:/image/12345678.jpg"));
3.批量生成
然而我们要批量生成不可能完全靠手输,接下来实现导入excel表批量生成。
需要引入poi依赖:
4.解析excel
<!-- office文件处理依赖--> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> <version>5.0.0</version> </dependency>
准备好一份表格:
测试读取:
5.批量图片压缩
单张图片输出或下载也不方便,这时候我们要用到压缩
批量导出压缩文件
代码如下
/** * 将文件打包成zip并下载 */ @PostMapping(value = "xiazai",consumes = MediaType.MULTIPART_FORM_DATA_VALUE) @ApiOperation("导出压缩包") public void download(HttpServletResponse response) throws IOException { response.setHeader("content-type", "application/octet-stream"); response.setHeader("Access-Control-Expose-Headers", "Content-Disposition"); response.setContentType("application/octet-stream"); response.setHeader(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=download.zip"); CompressUtil.createArchiver(CharsetUtil.CHARSET_UTF_8, ArchiveStreamFactory.ZIP,response.getOutputStream()) .add(FileUtil.file("E:/image")); // ZipUtils.pngZip(response.getOutputStream(), qrImages); }
6.上传excel直接将输出流转成压缩包
尝试上传excel生成二维码压缩包并下载(不会在服务器生成文件)
代码如下:
/** * 图片内容与名字 */ @Data public class QrImage { private byte[] bytes; private String name; }
/** * 将生成的二维码字节流压缩导出 * @param outputStream * @param qrImages */ public static void pngZip(OutputStream outputStream,List<QrImage> qrImages) { //Zip输出流 ZipOutputStream zipOutputStream = null; try { zipOutputStream = new ZipOutputStream(outputStream); for (QrImage file : qrImages) { ZipEntry zipEntry = new ZipEntry(file.getName()+".png"); zipOutputStream.putNextEntry(zipEntry); //写数据 zipOutputStream.write(file.getBytes(), 0, file.getBytes().length); zipOutputStream.flush(); } zipOutputStream.flush(); zipOutputStream.close(); } catch (IOException e) { e.printStackTrace(); } finally { // 关闭流 try { if (zipOutputStream != null) { zipOutputStream.close(); } if (outputStream != null) { outputStream.close(); } } catch (IOException e) { e.printStackTrace(); } } }
/** * 将文件打包成zip并下载 */ @PostMapping(value = "xiazai",consumes = MediaType.MULTIPART_FORM_DATA_VALUE) @ApiImplicitParam(name = "excelFile",value = "excel导入",required = true,dataType="MultipartFile",allowMultiple = true,paramType = "query") @ApiOperation("导出压缩包") public void download(@RequestParam("excelFile") MultipartFile file, HttpServletResponse response) throws IOException { //读取excel ExcelReader reader = ExcelUtil.getReader(file.getInputStream()); List<List<Object>> lists = reader.read(); //删除标题 lists.remove(0); //批量生成二维码 List<QrImage> qrImages = create(lists); response.setHeader("content-type", "application/octet-stream"); response.setHeader("Access-Control-Expose-Headers", "Content-Disposition"); response.setContentType("application/octet-stream"); response.setHeader(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=download.zip"); // CompressUtil.createArchiver(CharsetUtil.CHARSET_UTF_8, ArchiveStreamFactory.ZIP,response.getOutputStream()) // .add(FileUtil.file("E:/image")); ZipUtils.pngZip(response.getOutputStream(), qrImages); } public List<QrImage> create(List<List<Object>> list) throws FileNotFoundException { QrConfig config = new QrConfig(300, 300); // 设置边距,既二维码和背景之间的边距 config.setMargin(3); // 设置前景色,既二维码颜色(青色) config.setForeColor(Color.CYAN); // 设置背景色(灰色) config.setBackColor(Color.GRAY); byte[] bytes=null; List<QrImage> qrImages = new ArrayList<>(); QrImage qrImage; // 生成二维码到文件,也可以到流 for (List<Object> objects : list) { //将首列作为二维码内容 qrImage = new QrImage(); //将首列作为二维码内容 bytes = QrCodeUtil.generatePng(objects.get(0).toString(), config.setImg("E:/image/logo.png")); qrImage.setBytes(bytes); qrImage.setName(objects.get(0).toString()); qrImages.add(qrImage); } return qrImages; }
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