Spring boot 生成二维码

首先引入依赖

?

1 2 3 4 5 6 7 8 9 10

<dependency>     <groupId>com.google.zxing</groupId>     <artifactId>core</artifactId>     <version>3.3.0</version> </dependency> <dependency>     <groupId>com.google.zxing</groupId>     <artifactId>javase</artifactId>     <version>3.3.0</version> </dependency>

使用方法：

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

public String getQrcodeBytext(@RequestParam("text") String text,@RequestParam("width") int width,@RequestParam("height") int height) throws IOException, WriterException {     QRCodeWriter qrCodeWriter = new QRCodeWriter();     Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();     hints.put(EncodeHintType.CHARACTER_SET, "utf-8");     hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);     hints.put(EncodeHintType.MARGIN, 0);//去除多余白边, 数字越小,白边越小.为0时 没有白边     BitMatrix bitMatrix = qrCodeWriter.encode(text, BarcodeFormat.QR_CODE, width, height, hints);     ByteArrayOutputStream pngOutputStream = new ByteArrayOutputStream();     MatrixToImageWriter.writeToStream(bitMatrix, "PNG", pngOutputStream);     byte[] pngData = pngOutputStream.toByteArray();       //base64编码     Base64Encoder encoder = new Base64Encoder();     String png_base64 = encoder.encode(pngData).trim();//转换成base64串     png_base64 = png_base64.replaceAll("\n", "").replaceAll("\r", "");//删除 \r\n     return "data:image/png;base64,"+png_base64; }