Java產生二維碼

標籤：

　　java產生二維碼有很多種方式， 我現在使用的是Googlezxing方式

1、加入zxing包，我使用的是maven構建項目的

<dependency>    <groupId>com.google.zxing</groupId>    <artifactId>core</artifactId>    <version>3.2.0</version></dependency>

2、使用zxing開發還需要一個類，代碼如下

public final class MatrixToImageWriter {        private static final int BLACK = 0xFF000000;     private static final int WHITE = 0xFFFFFFFF;             private MatrixToImageWriter() {}               public static BufferedImage toBufferedImage(BitMatrix matrix) {         int width = matrix.getWidth();         int height = matrix.getHeight();         BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);         for (int x = 0; x < width; x++) {             for (int y = 0; y < height; y++) {                 image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);             }         }         return image;     }         public static void writeToFile(BitMatrix matrix, String format, File file)             throws IOException {         BufferedImage image = toBufferedImage(matrix);         if (!ImageIO.write(image, format, file)) {             throw new IOException("Could not write an image of format " + format + " to " + file);         }     }         public static void writeToStream(BitMatrix matrix, String format, OutputStream stream)             throws IOException {         BufferedImage image = toBufferedImage(matrix);         if (!ImageIO.write(image, format, stream)) {             throw new IOException("Could not write an image of format " + format);         }     } }

3、測試類別

public static void main(String[] args) throws WriterException, IOException {        String text = "120605181003;http://www.baidu.com";         int width = 300;         int height = 300;         //二維碼的圖片格式         String format = "gif";         Hashtable hints = new Hashtable();         //內容所使用編碼         hints.put(EncodeHintType.CHARACTER_SET, "utf-8");         BitMatrix bitMatrix = new MultiFormatWriter().encode(text,                 BarcodeFormat.QR_CODE, width, height, hints);         //產生二維碼         File outputFile = new File("d:"+File.separator+"new.gif");         MatrixToImageWriter.writeToFile(bitMatrix, format, outputFile);     }

 

Java產生二維碼