zxing的学习

如果在java se环境中使用zxing，需要在maven的pom.xml中添加依赖：


         
      
       com.google.zxing
          
      
       javase
          
      
       3.3.0

一、根据内容生成二维码

public void encodeNoReturn(String content) {    try {        Path path = new File("file/huhx.png").toPath();        BitMatrix matrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, 300, 300);        MatrixToImageWriter.writeToPath(matrix, "png", path);    } catch (Exception e) {        e.printStackTrace();    }}

二、根据二维码读取内容

public static void main(String[] args) {    File file = new File("file/huhx.jpg");    BufferedImage bufferedImage = null;    try {        bufferedImage = ImageIO.read(file);    } catch (IOException e) {        e.printStackTrace();    }    LuminanceSource source = new BufferedImageLuminanceSource(bufferedImage);    BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));    Hashtable
     
       hints = new Hashtable
      
       ();    hints.put(DecodeHintType.CHARACTER_SET, "GBK");    Result result = null;    try {        result = new MultiFormatReader().decode(bitmap, hints);    } catch (NotFoundException e) {        e.printStackTrace();    }    String url = result.getText();    System.out.println(url);}