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Java实现二维码QRCode的编码和解码

转:http://blog.csdn.net/ljb_blog/article/details/6700834

【一】、编码:

QRCodeEncoderHandler.java

 1 package michael.qrcode; 2  3 import java.awt.Color; 4 import java.awt.Graphics2D; 5 import java.awt.image.BufferedImage; 6 import java.io.File; 7  8 import javax.imageio.ImageIO; 9 10 import com.swetake.util.Qrcode;11 12 /**13  * 二维码生成器14  * @blog http://sjsky.iteye.com15  * @author Michael16  */17 public class QRCodeEncoderHandler {18 19     /**20      * 生成二维码(QRCode)图片21      * @param content22      * @param imgPath23      */24     public void encoderQRCode(String content, String imgPath) {25         try {26 27             Qrcode qrcodeHandler = new Qrcode();28             qrcodeHandler.setQrcodeErrorCorrect(‘M‘);29             qrcodeHandler.setQrcodeEncodeMode(‘B‘);30             qrcodeHandler.setQrcodeVersion(7);31 32             System.out.println(content);33             byte[] contentBytes = content.getBytes("gb2312");34 35             BufferedImage bufImg = new BufferedImage(140, 140,36                     BufferedImage.TYPE_INT_RGB);37 38             Graphics2D gs = bufImg.createGraphics();39 40             gs.setBackground(Color.WHITE);41             gs.clearRect(0, 0, 140, 140);42 43             // 设定图像颜色 > BLACK44             gs.setColor(Color.BLACK);45 46             // 设置偏移量 不设置可能导致解析出错47             int pixoff = 2;48             // 输出内容 > 二维码49             if (contentBytes.length > 0 && contentBytes.length < 120) {50                 boolean[][] codeOut = qrcodeHandler.calQrcode(contentBytes);51                 for (int i = 0; i < codeOut.length; i++) {52                     for (int j = 0; j < codeOut.length; j++) {53                         if (codeOut[j][i]) {54                             gs.fillRect(j * 3 + pixoff, i * 3 + pixoff, 3, 3);55                         }56                     }57                 }58             } else {59                 System.err.println("QRCode content bytes length = "60                         + contentBytes.length + " not in [ 0,120 ]. ");61             }62 63             gs.dispose();64             bufImg.flush();65 66             File imgFile = new File(imgPath);67 68             // 生成二维码QRCode图片69             ImageIO.write(bufImg, "png", imgFile);70 71         } catch (Exception e) {72             e.printStackTrace();73         }74 75     }76 77     /**78      * @param args the command line arguments79      */80     public static void main(String[] args) {81         String imgPath = "D:/test/twocode/Michael_QRCode.png";82 83         String content = "Hello 大大、小小,welcome to QRCode!"84                 + "\nMyblog [ http://sjsky.iteye.com ]"85                 + "\nEMail [ sjsky007@gmail.com ]" + "\nTwitter [ @suncto ]";86 87         QRCodeEncoderHandler handler = new QRCodeEncoderHandler();88         handler.encoderQRCode(content, imgPath);89 90         System.out.println("encoder QRcode success");91     }92 }

【二】、解码: 
 QRCodeDecoderHandler.java

package michael.qrcode;import java.awt.image.BufferedImage;import java.io.File;import java.io.IOException;import javax.imageio.ImageIO;import jp.sourceforge.qrcode.QRCodeDecoder;import jp.sourceforge.qrcode.data.QRCodeImage;import jp.sourceforge.qrcode.exception.DecodingFailedException;/** * @blog http://sjsky.iteye.com * @author Michael */public class QRCodeDecoderHandler {    /**     * 解码二维码     * @param imgPath     * @return String     */    public String decoderQRCode(String imgPath) {        // QRCode 二维码图片的文件        File imageFile = new File(imgPath);        BufferedImage bufImg = null;        String decodedData = http://www.mamicode.com/null;"gb2312"),            // "gb2312"));            // } catch (Exception e) {            // // TODO: handle exception            // }        } catch (IOException e) {            System.out.println("Error: " + e.getMessage());            e.printStackTrace();        } catch (DecodingFailedException dfe) {            System.out.println("Error: " + dfe.getMessage());            dfe.printStackTrace();        }        return decodedData;    }    /**     * @param args the command line arguments     */    public static void main(String[] args) {        QRCodeDecoderHandler handler = new QRCodeDecoderHandler();        String imgPath = "d:/test/twocode/Michael_QRCode.png";        String decoderContent = handler.decoderQRCode(imgPath);        System.out.println("解析结果如下:");        System.out.println(decoderContent);        System.out.println("========decoder success!!!");    }    class J2SEImage implements QRCodeImage {        BufferedImage bufImg;        public J2SEImage(BufferedImage bufImg) {            this.bufImg = bufImg;        }        public int getWidth() {            return bufImg.getWidth();        }        public int getHeight() {            return bufImg.getHeight();        }        public int getPixel(int x, int y) {            return bufImg.getRGB(x, y);        }    }}

  

Java实现二维码QRCode的编码和解码