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使用java解析和制作二维码

2024-07-11 08:02:53   219人阅读

 

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

 1 package util; 2 import com.google.zxing.common.BitMatrix; 3 import javax.imageio.ImageIO; 4 import java.io.File; 5 import java.io.OutputStream; 6 import java.io.IOException; 7 import java.awt.image.BufferedImage; 8 public final class MatrixToImageWriter { 9     private static final int BLACK = 0xFF000000;10     private static final int WHITE = 0xFFFFFFFF;11     private MatrixToImageWriter() {12     }13     public static BufferedImage toBufferedImage(BitMatrix matrix) {14         int width = matrix.getWidth();15         int height = matrix.getHeight();16         BufferedImage image = new BufferedImage(width, height,17                 BufferedImage.TYPE_INT_RGB);18         for (int x = 0; x < width; x++) {19             for (int y = 0; y < height; y++) {20                 image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);21             }22         }23         return image;24     }25     public static void writeToFile(BitMatrix matrix, String format, File file)26             throws IOException {27         BufferedImage image = toBufferedImage(matrix);28         if (!ImageIO.write(image, format, file)) {29             throw new IOException("Could not write an image of format "30                     + format + " to " + file);31         }32     }33     public static void writeToStream(BitMatrix matrix, String format,34             OutputStream stream) throws IOException {35         BufferedImage image = toBufferedImage(matrix);36         if (!ImageIO.write(image, format, stream)) {37             throw new IOException("Could not write an image of format "38                     + format);39         }40     }41 }

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());    }}


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