使用java解析和制作二维码

项目结构

文件源码 QR.zip

第一步：导入zxing的两个架包 core.jar和javase.jar

第二步：使用工具类 MatrixToImageWriter.java

package util;
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);
        }
    }
}

第三步：创建二维码

package demo;
import java.io.File;
import java.util.Hashtable;
import util.MatrixToImageWriter;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;
/**
 *将文字转换为二维码
 */
public class Encoder {
    public static void main(String[] args) throws Exception {
        String text = "http://www.tfgzs.com";
        Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();
        // 内容所使用编码
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        BitMatrix bitMatrix = new MultiFormatWriter().encode(text,BarcodeFormat.QR_CODE, 300, 300, hints);
        // 生成二维码
        MatrixToImageWriter.writeToFile(bitMatrix, "gif", new File("E:/123/new.gif"));
        System.out.println("二维码生成完成");
    }
}

第四步：解析二维码

package demo;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Hashtable;
import javax.imageio.ImageIO;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.NotFoundException;
import com.google.zxing.Result;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.HybridBinarizer;
/**
 * 将二维码解析为文字
 */
public class Decoder {
    public static void main(String[] args) {
        BufferedImage bufferedImage = null;
        try {
            bufferedImage = ImageIO.read(new File("E://123/qrcodeImage.png"));
        } catch (IOException e) {
            e.printStackTrace();
        }
        LuminanceSource source = new BufferedImageLuminanceSource(bufferedImage);
        BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
        Hashtable<DecodeHintType, String> hints = new Hashtable<DecodeHintType, String>();
        hints.put(DecodeHintType.CHARACTER_SET, "GBK");
        Result result = null;
        try {
            result = new MultiFormatReader().decode(bitmap, hints);
        } catch (NotFoundException e) {
            e.printStackTrace();
        }
        System.out.println(result.toString());
    }
}