二维码生成及解析

使用Zxing来对二维码生成和解析
 

 

package com.whl.qrcode;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Hashtable;

import javax.imageio.ImageIO;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.EncodeHintType;
import com.google.zxing.LuminanceSource;
import com.google.zxing.ReaderException;
import com.google.zxing.Result;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.QRCodeReader;
import com.google.zxing.qrcode.QRCodeWriter;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

public class CreateQrCodeTest {

    public static void createQrCode(OutputStream outputStream, String content, int qrCodeSize, String imageFormat){
        try{
            // Create the ByteMatrix for the QR-Code that encodes the given String.
            Hashtable<EncodeHintType, ErrorCorrectionLevel> hintMap = new Hashtable<EncodeHintType, ErrorCorrectionLevel>();
            hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
            QRCodeWriter qrCodeWriter = new QRCodeWriter();
            BitMatrix byteMatrix = qrCodeWriter.encode(content, BarcodeFormat.QR_CODE, qrCodeSize, qrCodeSize, hintMap);
           
            // Make the BufferedImage that are to hold the QRCode
            int matrixWidth = byteMatrix.getWidth();
            BufferedImage image = new BufferedImage(matrixWidth, matrixWidth, BufferedImage.TYPE_INT_RGB);
            image.createGraphics();
            Graphics2D graphics = (Graphics2D) image.getGraphics();
            graphics.setColor(Color.WHITE);
            graphics.fillRect(0, 0, matrixWidth, matrixWidth);

            // Paint and save the image using the ByteMatrix
            graphics.setColor(Color.BLACK);
            for (int i = 0; i < matrixWidth; i++){
                for (int j = 0; j < matrixWidth; j++){
                    if (byteMatrix.get(i, j)){
                        graphics.fillRect(i, j, 1, 1);
                    }
                }
            }

            ImageIO.write(image, imageFormat, outputStream);
        }catch (Exception ex) {
            ex.printStackTrace();
        }
    }
   
    public static void readQrCode(InputStream inputStream) throws IOException{
       
        //get the data from the input stream
        BufferedImage image = ImageIO.read(inputStream);

        //convert the image to a binary bitmap source
        LuminanceSource source = new BufferedImageLuminanceSource(image);
        BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));

        //decode the barcode
        QRCodeReader reader = new QRCodeReader();

        Result result = null ;
        try {
         result = reader.decode(bitmap);
        } catch (ReaderException e) {
         //the data is improperly formatted
            e.printStackTrace();
        }

        System.out.println(result.getText());
    }

    public static void main(String[] args) throws IOException {

//        createQrCode(new FileOutputStream(new File("d:\\qrcode.jpg")),"name:whl",300,"JPEG");
   
        readQrCode(new FileInputStream(new File("d:\\qrcode.jpg")));
    }

}

 

效果图：   附件为zxing jar文件

 

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