Java使用zxing生成解读QRcode二维码

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();
     }
}