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【Python】二维码
作者:玉玲 / 发布于2014/12/13/ 483

	import java.awt.Color;
	import java.awt.Graphics2D;
	import java.awt.image.BufferedImage;
	import java.io.File;
	
	import javax.imageio.ImageIO;
	
	import com.swetake.util.Qrcode;
	
	public class QRCodeEncoderTest {
	 public static void main(String[] args) throws Exception {
	 Qrcode qrcode=new Qrcode();
	 qrcode.setQrcodeErrorCorrect('M');
	 qrcode.setQrcodeEncodeMode('B');
	 qrcode.setQrcodeVersion(7);
	
	 String testString = "_-+^%$#@!~`=&)*(";
	
	 byte[] d =testString.getBytes("GBK");
	
	
	 BufferedImage bi = new BufferedImage(139, 139, BufferedImage.TYPE_INT_RGB);
	
	 // createGraphics
	 Graphics2D g = bi.createGraphics();
	
	 // set background
	 g.setBackground(Color.WHITE);
	 g.clearRect(0, 0, 139, 139);
	
	 g.setColor(Color.BLACK);
	
	
	 if (d.length>0 && d.length <123){
	 boolean[][] b = qrcode.calQrcode(d);
	
	 for (int i=0;i<b.length;i++){
	
	 for (int j=0;j<b.length;j++){
	 if (b[j][i]) {
	 g.fillRect(j*3+2,i*3+2,3,3);
	 }
	 }
	
	 }
	 }
	
	 g.dispose();
	 bi.flush();
	
	 String FilePath="TestQRCode.png";
	 File f = new File(FilePath);
	
	 ImageIO.write(bi, "png", f);
	 System.out.println("doned!");
	 }
	
	}

	

	import java.awt.image.BufferedImage;
	import java.io.File;
	import java.io.IOException;
	import java.io.UnsupportedEncodingException;
	
	import javax.imageio.ImageIO;
	
	import jp.sourceforge.qrcode.QRCodeDecoder;
	import jp.sourceforge.qrcode.data.QRCodeImage;
	import jp.sourceforge.qrcode.exception.DecodingFailedException;
	public class QRCodeDecoderTest {
	
	 public QRCodeDecoderTest() {
	 }
	
	 public static void main(String[] args) {
	
	 QRCodeDecoder decoder = new QRCodeDecoder();
	
	 File imageFile = new File("TestQRCode.png");
	
	 BufferedImage image = null;
	
	 try {
	 image = ImageIO.read(imageFile);
	 } catch (IOException e) {
	 System.out.println("Error: "+ e.getMessage());
	 }
	 try {
	
	 String decodedData = new String(decoder.decode(new J2SEImage(image)),"GBK");
	
	 System.out.println(decodedData);
	 } catch (DecodingFailedException dfe) {
	 System.out.println("Error: " + dfe.getMessage());
	 } catch (UnsupportedEncodingException e) {
	 e.printStackTrace();
	 }
	
	
	 }
	}
	
	class J2SEImage implements QRCodeImage {
	 BufferedImage image;
	
	 public J2SEImage(BufferedImage image) {
	 this.image = image;
	 }
	
	 public int getWidth() {
	 return image.getWidth();
	 }
	
	 public int getHeight() {
	 return image.getHeight();
	 }
	
	 public int getPixel(int x, int y) {
	 return image.getRGB(x, y);
	 }
	
	}

	package qrcode;
	
	import java.awt.Color;
	import java.awt.Graphics2D;
	import java.awt.image.BufferedImage;
	import java.io.File;
	import java.io.IOException;
	import java.io.InputStream;
	import java.io.OutputStream;
	
	import javax.imageio.ImageIO;
	
	import jp.sourceforge.qrcode.QRCodeDecoder;
	import jp.sourceforge.qrcode.exception.DecodingFailedException;
	
	import com.swetake.util.Qrcode;
	
	public class TwoDimensionCode {
	
	 /**
	 * 生成二维码(QRCode)图片
	 * @param content 存储内容
	 * @param imgPath 图片路径
	 */
	 public void encoderQRCode(String content, String imgPath) {
	 this.encoderQRCode(content, imgPath, "png", 7);
	 }
	
	 /**
	 * 生成二维码(QRCode)图片
	 * @param content 存储内容
	 * @param output 输出流
	 */
	 public void encoderQRCode(String content, OutputStream output) {
	 this.encoderQRCode(content, output, "png", 7);
	 }
	
	 /**
	 * 生成二维码(QRCode)图片
	 * @param content 存储内容
	 * @param imgPath 图片路径
	 * @param imgType 图片类型
	 */
	 public void encoderQRCode(String content, String imgPath, String imgType) {
	 this.encoderQRCode(content, imgPath, imgType, 7);
	 }
	
	 /**
	 * 生成二维码(QRCode)图片
	 * @param content 存储内容
	 * @param output 输出流
	 * @param imgType 图片类型
	 */
	 public void encoderQRCode(String content, OutputStream output, String imgType) {
	 this.encoderQRCode(content, output, imgType, 7);
	 }
	
	 /**
	 * 生成二维码(QRCode)图片
	 * @param content 存储内容
	 * @param imgPath 图片路径
	 * @param imgType 图片类型
	 * @param size 二维码尺寸
	 */
	 public void encoderQRCode(String content, String imgPath, String imgType, int size) {
	 try {
	 BufferedImage bufImg = this.qRCodeCommon(content, imgType, size);
	
	 File imgFile = new File(imgPath);
	 // 生成二维码QRCode图片
	 ImageIO.write(bufImg, imgType, imgFile);
	 } catch (Exception e) {
	 e.printStackTrace();
	 }
	 }
	
	 /**
	 * 生成二维码(QRCode)图片
	 * @param content 存储内容
	 * @param output 输出流
	 * @param imgType 图片类型
	 * @param size 二维码尺寸
	 */
	 public void encoderQRCode(String content, OutputStream output, String imgType, int size) {
	 try {
	 BufferedImage bufImg = this.qRCodeCommon(content, imgType, size);
	 // 生成二维码QRCode图片
	 ImageIO.write(bufImg, imgType, output);
	 } catch (Exception e) {
	 e.printStackTrace();
	 }
	 }
	
	 /**
	 * 生成二维码(QRCode)图片的公共方法
	 * @param content 存储内容
	 * @param imgType 图片类型
	 * @param size 二维码尺寸
	 * @return
	 */
	 private BufferedImage qRCodeCommon(String content, String imgType, int size) {
	 BufferedImage bufImg = null;
	 try {
	 Qrcode qrcodeHandler = new Qrcode();
	 // 设置二维码排错率，可选L(7%)、M(15%)、Q(25%)、H(30%)，排错率越高可存储的信息越少，但对二维码清晰度的要求越小
	 qrcodeHandler.setQrcodeErrorCorrect('M');
	 qrcodeHandler.setQrcodeEncodeMode('B');
	 // 设置设置二维码尺寸，取值范围1-40，值越大尺寸越大，可存储的信息越大
	 qrcodeHandler.setQrcodeVersion(size);
	 // 获得内容的字节数组，设置编码格式
	 byte[] contentBytes = content.getBytes("utf-8");
	 // 图片尺寸
	 int imgSize = 67 + 12 * (size - 1);
	 bufImg = new BufferedImage(imgSize, imgSize, BufferedImage.TYPE_INT_RGB);
	 Graphics2D gs = bufImg.createGraphics();
	 // 设置背景颜色
	 gs.setBackground(Color.WHITE);
	 gs.clearRect(0, 0, imgSize, imgSize);
	
	 // 设定图像颜色> BLACK
	 gs.setColor(Color.BLACK);
	 // 设置偏移量，不设置可能导致解析出错
	 int pixoff = 2;
	 // 输出内容> 二维码
	 if (contentBytes.length > 0 && contentBytes.length < 800) {
	 boolean[][] codeOut = qrcodeHandler.calQrcode(contentBytes);
	 for (int i = 0; i < codeOut.length; i++) {
	 for (int j = 0; j < codeOut.length; j++) {
	 if (codeOut[j][i]) {
	 gs.fillRect(j * 3 + pixoff, i * 3 + pixoff, 3, 3);
	 }
	 }
	 }
	 } else {
	 throw new Exception("QRCode content bytes length = " + contentBytes.length + " not in [0, 800].");
	 }
	 gs.dispose();
	 bufImg.flush();
	 } catch (Exception e) {
	 e.printStackTrace();
	 }
	 return bufImg;
	 }
	
	 /**
	 * 解析二维码（QRCode）
	 * @param imgPath 图片路径
	 * @return
	 */
	 public String decoderQRCode(String imgPath) {
	 // QRCode 二维码图片的文件
	 File imageFile = new File(imgPath);
	 BufferedImage bufImg = null;
	 String content = null;
	 try {
	 bufImg = ImageIO.read(imageFile);
	 QRCodeDecoder decoder = new QRCodeDecoder();
	 content = new String(decoder.decode(new TwoDimensionCodeImage(bufImg)), "utf-8");
	 } catch (IOException e) {
	 System.out.println("Error: " + e.getMessage());
	 e.printStackTrace();
	 } catch (DecodingFailedException dfe) {
	 System.out.println("Error: " + dfe.getMessage());
	 dfe.printStackTrace();
	 }
	 return content;
	 }
	
	 /**
	 * 解析二维码（QRCode）
	 * @param input 输入流
	 * @return
	 */
	 public String decoderQRCode(InputStream input) {
	 BufferedImage bufImg = null;
	 String content = null;
	 try {
	 bufImg = ImageIO.read(input);
	 QRCodeDecoder decoder = new QRCodeDecoder();
	 content = new String(decoder.decode(new TwoDimensionCodeImage(bufImg)), "utf-8");
	 } catch (IOException e) {
	 System.out.println("Error: " + e.getMessage());
	 e.printStackTrace();
	 } catch (DecodingFailedException dfe) {
	 System.out.println("Error: " + dfe.getMessage());
	 dfe.printStackTrace();
	 }
	 return content;
	 }
	
	 public static void main(String[] args) {
	 String imgPath = "G:/TDDOWNLOAD/Michael_QRCode.png";
	 String encoderContent = "Hello 大大、小小,welcome to QRCode!" + "\nMyblog [ http://sjsky.iteye.com ]" + "\nEMail [ sjsky007@gmail.com ]";
	 TwoDimensionCode handler = new TwoDimensionCode();
	 handler.encoderQRCode(encoderContent, imgPath, "png");
	// try {
	// OutputStream output = new FileOutputStream(imgPath);
	// handler.encoderQRCode(content, output);
	// } catch (Exception e) {
	// e.printStackTrace();
	// }
	 System.out.println("========encoder success");
	
	
	 String decoderContent = handler.decoderQRCode(imgPath);
	 System.out.println("解析结果如下：");
	 System.out.println(decoderContent);
	 System.out.println("========decoder success!!!");
	 }
	}

	package qrcode;
	
	import java.awt.image.BufferedImage;
	
	import jp.sourceforge.qrcode.data.QRCodeImage;
	
	public class TwoDimensionCodeImage implements QRCodeImage {
	
	 BufferedImage bufImg;
	
	 public TwoDimensionCodeImage(BufferedImage bufImg) {
	 this.bufImg = bufImg;
	 }
	
	 @Override
	 public int getHeight() {
	 return bufImg.getHeight();
	 }
	
	 @Override
	 public int getPixel(int x, int y) {
	 return bufImg.getRGB(x, y);
	 }
	
	 @Override
	 public int getWidth() {
	 return bufImg.getWidth();
	 }
	
	}
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