生成二维码

package imooc.zxing;

import java.io.File;
import java.nio.file.Path;
import java.util.HashMap;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

/**
 * zxing生成二维码
 * @author 18430
 *
 */
public class Zxing {
    public static void main(String[] args) {
        int width=300;
        int height=300;
        String format="png";
        String content="www.imooc.com";

        HashMap hints=new HashMap();
        hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
        hints.put(EncodeHintType.MARGIN, 2);
        
        try {
            BitMatrix BitMatrix=new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height,hints);
            Path file=new File("C:/Users/18430/OneDrive/Documents/img.png").toPath();
            MatrixToImageWriter.writeToPath(BitMatrix, format, file);
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
    }

}

package imooc.zxing;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;

import javax.imageio.ImageIO;

import com.google.zxing.BinaryBitmap;
import com.google.zxing.EncodeHintType;
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;

/**
 * 解析二维码
 * 
 * @author 18430
 *
 */

public class Readqrcode {

    public static void main(String[] args) {
        try {
            MultiFormatReader formatReader = new MultiFormatReader();
            File file = new File("C:/Users/18430/OneDrive/Documents/img.png");

            BufferedImage image;

            image = ImageIO.read(file);
            BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(image)));

            HashMap hints = new HashMap();
            hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");

            Result result = formatReader.decode(binaryBitmap);
            System.out.println("解析结果："+result.toString());
            System.out.println("二维码格式："+result.getBarcodeFormat());
            System.out.println("二维码文本内容："+result.getText());
        } catch (IOException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }

        catch (NotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }
}

package imooc.qrcoe;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.UnsupportedEncodingException;

import javax.imageio.ImageIO;

import org.ietf.jgss.GSSContext;

import com.swetake.util.Qrcode;

/**
 * qrcode生成二维码
 * @author 18430
 *
 */
public class CreateQrcode {

    public static void main(String[] args) throws UnsupportedEncodingException {
    Qrcode x=new Qrcode();
    x.setQrcodeErrorCorrect('M');//纠错等级
    x.setQrcodeEncodeMode('B');//‘N’代表数字 'A'代表a-Z 'B'代表其他字符
    x.setQrcodeVersion(7);//版本
    String qrData="www.imooc.com";
    int height=67+12*(7-1);//67+12*(版本号-1)
    int width=67+12*(7-1);
    
    BufferedImage bufferedImage=new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
    Graphics2D gs=bufferedImage.createGraphics();
    gs.setBackground(Color.white);
    gs.setColor(Color.black);
    gs.clearRect(0, 0, width, height);
    
    int pixoff=2;//偏移量（避免解析出错）
    //往画板里填充内容
    byte[] d=qrData.getBytes("gb2312");
    if(d.length>0 && d.length<120){
        boolean[][] s=x.calQrcode(d);
        
        for(int i=0;i<s.length;i++){
            for(int j=0;j<s.length;j++){
                if(s[j][i]){
                gs.fillRect(j*3+pixoff, i*3+pixoff, 3, 3);    
                }
            }
            
        }
    }
    gs.dispose();
    bufferedImage.flush();
    
    try {
        ImageIO.write(bufferedImage, "png", new File("C:/Users/18430/OneDrive/Documents/img.png"));
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } 
}
    
}