<?xml version="1.0" encoding="UTF-8"?><project xmlns="http://maven.apache.org/POM/4.0.0"         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">    <modelVersion>4.0.0</modelVersion>    <groupId>com.nihaorz</groupId>    <artifactId>zxing</artifactId>    <version>1.0-SNAPSHOT</version>    <dependencies>        <dependency>            <groupId>com.google.zxing</groupId>            <artifactId>core</artifactId>            <version>2.3.0</version>        </dependency>    </dependencies></project>

import com.google.zxing.common.BitMatrix;import javax.imageio.ImageIO;import java.awt.image.BufferedImage;import java.io.File;import java.io.IOException;import java.io.OutputStream;/** * Created by Nihaorz on 2017/5/9. */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);        }    }}

import com.google.zxing.LuminanceSource;import java.awt.*;import java.awt.geom.AffineTransform;import java.awt.image.BufferedImage;/** * Created by Nihaorz on 2017/5/9. */public 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);    }}

import com.google.zxing.BarcodeFormat;import com.google.zxing.Binarizer;import com.google.zxing.BinaryBitmap;import com.google.zxing.DecodeHintType;import com.google.zxing.EncodeHintType;import com.google.zxing.LuminanceSource;import com.google.zxing.MultiFormatReader;import com.google.zxing.MultiFormatWriter;import com.google.zxing.Result;import com.google.zxing.common.BitMatrix;import com.google.zxing.common.HybridBinarizer;import javax.imageio.ImageIO;import java.awt.image.BufferedImage;import java.io.File;import java.io.FileInputStream;import java.util.HashMap;import java.util.Random;/** * Created by Nihaorz on 2017/5/9. */public class Test {    public static void main(String[] args) {        String path = createQrcode("https://github.com/zxing/zxing");        System.out.println("生成的二维码地址:"+path);        String text = decodeQr(path);        System.out.println("扫描二维码得到的文字:"+text);    }    public static String createQrcode(String _text){        String qrcodeFilePath = "";        try {            int qrcodeWidth = 256;            int qrcodeHeight = 256;            String qrcodeFormat = "png";            HashMap<EncodeHintType, String> hints = new HashMap<EncodeHintType, String>();            hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");            BitMatrix bitMatrix = new MultiFormatWriter().encode(_text, BarcodeFormat.QR_CODE, qrcodeWidth, qrcodeHeight, hints);            BufferedImage image = new BufferedImage(qrcodeWidth, qrcodeHeight, BufferedImage.TYPE_INT_RGB);            Random random = new Random();            File QrcodeFile = new File("F:\\qrcode\\" + random.nextInt() + "." + qrcodeFormat);            ImageIO.write(image, qrcodeFormat, QrcodeFile);            MatrixToImageWriter.writeToFile(bitMatrix, qrcodeFormat, QrcodeFile);            qrcodeFilePath = QrcodeFile.getAbsolutePath();        } catch (Exception e) {            e.printStackTrace();        }        return qrcodeFilePath;    }    public static String decodeQr(String filePath) {        String retStr = "";        if ("".equalsIgnoreCase(filePath) && filePath.length() == 0) {            return "图片路径为空!";        }        try {            BufferedImage bufferedImage = ImageIO.read(new FileInputStream(filePath));            LuminanceSource source = new BufferedImageLuminanceSource(bufferedImage);            Binarizer binarizer = new HybridBinarizer(source);            BinaryBitmap bitmap = new BinaryBitmap(binarizer);            HashMap<DecodeHintType, Object> hintTypeObjectHashMap = new HashMap<DecodeHintType, Object>();            hintTypeObjectHashMap.put(DecodeHintType.CHARACTER_SET, "UTF-8");            Result result = new MultiFormatReader().decode(bitmap, hintTypeObjectHashMap);            retStr = result.getText();        } catch (Exception e) {            e.printStackTrace();        }        return retStr;    }}