<!-- https://mvnrepository.com/artifact/com.google.zxing/core --><dependency><groupId>com.google.zxing</groupId><artifactId>core</artifactId><version>3.3.3</version></dependency><!-- https://mvnrepository.com/artifact/com.google.zxing/javase --><dependency><groupId>com.google.zxing</groupId><artifactId>javase</artifactId><version>3.3.3</version></dependency>

@RequestMapping("/test3")public String test03(HttpServletRequest req){System.out.println(1234);final int width = 300;final int height = 300;final String format = "png";final String content = "我爱你，中国!!!";//定义二维码的参数HashMap hints = new HashMap();hints.put(EncodeHintType.CHARACTER_SET, "utf-8");hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);hints.put(EncodeHintType.MARGIN, 2);//生成二维码try{BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);Path file = new File(req.getSession().getServletContext().getRealPath("")+"static\\img.png").toPath();MatrixToImageWriter.writeToPath(bitMatrix, format, file);}catch(Exception e){}return "index2";}

<div align="center" style="width: 100%;">
<img src="../static/img.png">
</div>
<div align="center" style="width: 100%;"><button οnclick="get();">getText</button>
</div>
<script type="text/javascript" src="../static/jquery.min.js"></script>
<script type="text/javascript">function  get() {var url = "test4";$.get(url,function(data){alert(data.text);});}
</script>

@RequestMapping("/test4")@ResponseBodypublic Map test04(HttpServletRequest req) throws Exception {MultiFormatReader formatReader = new MultiFormatReader();File file = new File(req.getSession().getServletContext().getRealPath("")+"static\\img.png");BufferedImage image = ImageIO.read(file);BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(image)));//定义二维码的参数HashMap hints = new HashMap();hints.put(EncodeHintType.CHARACTER_SET, "utf-8");Result result = formatReader.decode(binaryBitmap, hints);System.out.println("二维码解析结果：" + result.toString());System.out.println("二维码的格式：" + result.getBarcodeFormat());System.out.println("二维码的文本内容：" + result.getText());Map map = new HashMap();map.put("text",result.getText());return map;}