http://www.manongjc.com/article/18411.html
首先,在pom.xml文件中添加依赖
<dependency> <groupId>com.google.zxing</groupId> <artifactId>core</artifactId> <version>3.3.3</version> <scope>compile</scope> </dependency> <dependency> <groupId>com.google.zxing</groupId> <artifactId>javase</artifactId> <version>3.3.3</version> <scope>compile</scope> </dependency>
其次,Controller的写法(生成二维码并以流的形式输出到浏览器)
@RequestMapping("/test") public void dowanload(HttpServletRequest request,HttpServletResponse response) throws Exception { //二维码中包含的信息 String content = "姓名:十二余\n博客:https://www.cnblogs.com/jing5464"; Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>(); // 指定编码格式 hints.put(EncodeHintType.CHARACTER_SET, "UTF-8"); // 指定纠错级别(L--7%,M--15%,Q--25%,H--30%) hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H); // 编码内容,编码类型(这里指定为二维码),生成图片宽度,生成图片高度,设置参数 BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, 200, 200, hints); //设置请求头 response.setHeader("Content-Type","application/octet-stream"); response.setHeader("Content-Disposition", "attachment;filename=" + "十二余的二维码.png"); OutputStream outputStream = response.getOutputStream(); MatrixToImageWriter.writeToStream(bitMatrix, "png", outputStream); outputStream.flush(); outputStream.close(); }
页面展示标签:
<img src="http://localhost:20010/projectname/zxing/test" style="width:80;height:80"/>