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Java利用Zxing生成二维码


 

     Zxing是Google提供的关于条码(一维码、二维码)的解析工具,提供了二维码的生成与解析的方法,现在我简单介绍一下使用Java利用Zxing生成与解析二维码

  1、二维码的生成

  1.1 将Zxing-core.jar 包加入到classpath下。

  1.2 二维码的生成需要借助MatrixToImageWriter类,该类是由Google提供的,可以将该类拷贝到源码中,这里我将该类的源码贴上,可以直接使用。

  import com.google.zxing.common.BitMatrix;

  import javax.imageio.ImageIO;

  import java.io.File;

  import java.io.OutputStream;

  import java.io.IOException;

  import java.awt.image.BufferedImage;

  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);

  }

  }

  }

  1.3 编写生成二维码的实现代码

  try {

  String content = "120605181003;.cnblogs.com/jtmjx";

  String path = "C:/Users/Administrator/Desktop/testImage";

  MultiFormatWriter multiFormatWriter = new MultiFormatWriter();

  Map hints = new HashMap();

  hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");

  BitMatrix bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, 400, 400,hints);

  File file1 = new File(path,"餐巾纸.jpg");

  MatrixToImageWriter.writeToFile(bitMatrix, "jpg", file1);

  } catch (Exception e) {

  e.printStackTrace();

  }

  现在运行后即可生成一张二维码图片,是不是很简单啊?