1.3 编写生成二维码的实现代码
- 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);
- }
- }
- }
现在运行后即可生成一张二维码图片,是不是很简单啊? 接下来我们看看如何解析二维码 2、二维码的解析 2.1 将Zxing-core.jar 包加入到classpath下。 2.2 和生成一样,我们需要一个辅助类( BufferedImageLuminanceSource),同样该类Google也提供了,这里我同样将该类的源码贴出来,可以直接拷贝使用个,省去查找的麻烦
- try {
- String content = "120605181003;http://www.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();
- }
2.3 编写解析二维码的实现代码
- BufferedImageLuminanceSource
- import com.google.zxing.LuminanceSource;
- import java.awt.Graphics2D;
- import java.awt.geom.AffineTransform;
- import java.awt.image.BufferedImage;
- public final class BufferedImageLuminanceSource extends LuminanceSource {
- private final BufferedImage image;
- private final int left;
- private final int top;
- public BufferedImageLuminanceSource(BufferedImage image) {
- this(image, 0, 0, image.getWidth(), image.getHeight());
- }
- public BufferedImageLuminanceSource(BufferedImage image, int left, int top, int width, int height) {
- super(width, height);
- int sourceWidth = image.getWidth();
- int sourceHeight = image.getHeight();
- if (left + width > sourceWidth || top + height > sourceHeight) {
- throw new IllegalArgumentException("Crop rectangle does not fit within image data.");
- }
- for (int y = top; y < top + height; y++) {
- for (int x = left; x < left + width; x++) {
- if ((image.getRGB(x, y) & 0xFF000000) == 0) {
- image.setRGB(x, y, 0xFFFFFFFF); // = white
- }
- }
- }
- this.image = new BufferedImage(sourceWidth, sourceHeight, BufferedImage.TYPE_BYTE_GRAY);
- this.image.getGraphics().drawImage(image, 0, 0, null);
- this.left = left;
- this.top = top;
- }
- @Override
- public byte[] getRow(int y, byte[] row) {
- if (y < 0 || y >= getHeight()) {
- throw new IllegalArgumentException("Requested row is outside the image: " + y);
- }
- int width = getWidth();
- if (row == null || row.length < width) {
- row = new byte[width];
- }
- image.getRaster().getDataElements(left, top + y, width, 1, row);
- return row;
- }
- @Override
- public byte[] getMatrix() {
- int width = getWidth();
- int height = getHeight();
- int area = width * height;
- byte[] matrix = new byte[area];
- image.getRaster().getDataElements(left, top, width, height, matrix);
- return matrix;
- }
- @Override
- public boolean isCropSupported() {
- return true;
- }
- @Override
- public LuminanceSource crop(int left, int top, int width, int height) {
- return new BufferedImageLuminanceSource(image, this.left + left, this.top + top, width, height);
- }
- @Override
- public boolean isRotateSupported() {
- return true;
- }
- @Override
- public LuminanceSource rotateCounterClockwise() {
- int sourceWidth = image.getWidth();
- int sourceHeight = image.getHeight();
- AffineTransform transform = new AffineTransform(0.0, -1.0, 1.0, 0.0, 0.0, sourceWidth);
- BufferedImage rotatedImage = new BufferedImage(sourceHeight, sourceWidth, BufferedImage.TYPE_BYTE_GRAY);
- Graphics2D g = rotatedImage.createGraphics();
- g.drawImage(image, transform, null);
- g.dispose();
- int width = getWidth();
- return new BufferedImageLuminanceSource(rotatedImage, top, sourceWidth - (left + width), getHeight(), width);
- }
- }
- try {
- MultiFormatReader formatReader = new MultiFormatReader();
- String filePath = "C:/Users/Administrator/Desktop/testImage/test.jpg";
- File file = new File(filePath);
- BufferedImage image = ImageIO.read(file);;
- LuminanceSource source = new BufferedImageLuminanceSource(image);
- Binarizer binarizer = new HybridBinarizer(source);
- BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);
- Map hints = new HashMap();
- hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
- Result result = formatReader.decode(binaryBitmap,hints);
- System.out.println("result = "+ result.toString());
- System.out.println("resultFormat = "+ result.getBarcodeFormat());
- System.out.println("resultText = "+ result.getText());
- } catch (Exception e) {
- e.printStackTrace();
- }
来源: http://www.phpxs.com/code/1002164/