Java使用zxing生成解读QRcode二维码

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1.maven的pom配置jar包，如果不实用maven请手动下载jar包

<dependency>

    <groupId>com.google.zxing</groupId>

    <artifactId>javase</artifactId>

    <version>3.3.0</version>

</dependency>

2.生成二维码图片

public static void main( String[] args ) {

     //生成图片的一些基本参数

     int width = 300;

     int height = 300;

     String format = "png";

     //这里是内容

     String content = "看着你们加班，我不加班，我好开心!";

     //定义二维码参数

     Map<EncodeHintType, Object> params = new HashMap<EncodeHintType, Object>();

     params.put(EncodeHintType.CHARACTER_SET, "utf-8");

     params.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);

     params.put(EncodeHintType.MARGIN, 2);

     //生成二维码

     try {

          BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, params);

          Path file = new File("D:/image/img.png").toPath();

          MatrixToImageWriter.writeToPath(bitMatrix, format, file);

     } catch (Exception e) {

          // TODO Auto-generated catch block

          e.printStackTrace();

     }

}

3.读取二维码中信息

public static void main(String[] args) {

     MultiFormatReader multiFormatReader = new MultiFormatReader();

     //读取图片

     File file = new File("D:/image/img.png");

     try {

          BufferedImage image = ImageIO.read(file);

          BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(image)));

          Result result = multiFormatReader.decode(binaryBitmap);

          //这里是返回的信息

          System.out.println(result.toString());

          System.out.println(result.getBarcodeFormat());

          System.out.println(result.getText());

     } catch (Exception e) {

          // TODO Auto-generated catch block

          e.printStackTrace();

     }

}