Zxing和QR CODE 生成与解析二维码实例(普通篇)
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首先下载对应的jar包,本实例用的是Zxing2.2jar
下载地址:http://download.csdn.net/detail/gao36951/8161861
Zxing是Google提供的关于条码(一维码、二维码)的解析工具,提供了二维码的生成与解析的方法,
下面看Zxing实例
代码:
- package com.zxing.create;
- import java.awt.image.BufferedImage;
- import java.io.File;
- import java.io.IOException;
- import java.util.HashMap;
- import java.util.Map;
- import javax.imageio.ImageIO;
- import com.google.zxing.BarcodeFormat;
- import com.google.zxing.Binarizer;
- import com.google.zxing.BinaryBitmap;
- import com.google.zxing.EncodeHintType;
- import com.google.zxing.LuminanceSource;
- import com.google.zxing.MultiFormatReader;
- import com.google.zxing.MultiFormatWriter;
- import com.google.zxing.Result;
- import com.google.zxing.WriterException;
- import com.google.zxing.common.BitMatrix;
- import com.google.zxing.common.HybridBinarizer;
- import com.util.BufferedImageLuminanceSource;
- /**
- * @Description: (普通二维码生成)
- * @author:Relieved
- * @date:2014-11-7 下午04:42:35
- */
- public class CreateParseCode {
- public static void main(String [] args) throws IOException, WriterException{
- CreateParseCode cpCode = new CreateParseCode();
- // 生成二维码
- cpCode.createCode();
- // 解析二维码
- cpCode.parseCode(new File(“D:/二维码生成/TDC-test.png”));
- }
- /**
- * 二维码的生成
- *
- */
- public void createCode(){
- String text = ”http://blog.csdn.net/gao36951”;
- int width = 300;
- int height = 300;
- // 二维码的图片格式
- String format = ”png”;
- /**
- * 设置二维码的参数
- */
- HashMap hints = new HashMap();
- // 内容所使用编码
- hints.put(EncodeHintType.CHARACTER_SET, ”utf-8”);
- try {
- BitMatrix bitMatrix = new MultiFormatWriter().encode(text,BarcodeFormat.QR_CODE,width,height,hints);
- // 生成二维码
- File outputFile = new File(“D:”+ File.separator +“二维码生成” + File.separator + “TDC-test.png”);
- MatrixToImageWriter.writeToFile(bitMatrix, format, outputFile);
- } catch (Exception e) {
- e.printStackTrace();
- }
- }
- /**
- * 二维码的解析
- *
- * @param file
- */
- public void parseCode(File file)
- {
- try
- {
- MultiFormatReader formatReader = new MultiFormatReader();
- if (!file.exists())
- {
- return;
- }
- BufferedImage image = ImageIO.read(file);
- LuminanceSource source = new BufferedImageLuminanceSource(image);
- Binarizer binarizer = new HybridBinarizer(source);
- BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);
- Map hints = new HashMap();
- hints.put(EncodeHintType.CHARACTER_SET, ”UTF-8”);
- Result result = formatReader.decode(binaryBitmap, hints);
- System.out.println(”解析结果 = ” + result.toString());
- System.out.println(”二维码格式类型 = ” + result.getBarcodeFormat());
- System.out.println(”二维码文本内容 = ” + result.getText());
- }
- catch (Exception e)
- {
- e.printStackTrace();
- }
- }
- }
package com.zxing.create;import java.awt.image.BufferedImage;import java.io.File;import java.io.IOException;import java.util.HashMap;import java.util.Map;import javax.imageio.ImageIO;import com.google.zxing.BarcodeFormat;import com.google.zxing.Binarizer;import com.google.zxing.BinaryBitmap;import com.google.zxing.EncodeHintType;import com.google.zxing.LuminanceSource;import com.google.zxing.MultiFormatReader;import com.google.zxing.MultiFormatWriter;import com.google.zxing.Result;import com.google.zxing.WriterException;import com.google.zxing.common.BitMatrix;import com.google.zxing.common.HybridBinarizer;import com.util.BufferedImageLuminanceSource;/** * @Description: (普通二维码生成) * @author:Relieved * @date:2014-11-7 下午04:42:35 */public class CreateParseCode { public static void main(String [] args) throws IOException, WriterException{ CreateParseCode cpCode = new CreateParseCode();// 生成二维码 cpCode.createCode();// 解析二维码 cpCode.parseCode(new File("D:/二维码生成/TDC-test.png")); } /** * 二维码的生成 * */ public void createCode(){ String text = "http://blog.csdn.net/gao36951"; int width = 300; int height = 300; // 二维码的图片格式 String format = "png"; /** * 设置二维码的参数 */ HashMap hints = new HashMap(); // 内容所使用编码 hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); try { BitMatrix bitMatrix = new MultiFormatWriter().encode(text,BarcodeFormat.QR_CODE,width,height,hints); // 生成二维码 File outputFile = new File("D:"+ File.separator +"二维码生成" + File.separator + "TDC-test.png"); MatrixToImageWriter.writeToFile(bitMatrix, format, outputFile); } catch (Exception e) { e.printStackTrace(); } } /** * 二维码的解析 * * @param file */ public void parseCode(File file) { try { MultiFormatReader formatReader = new MultiFormatReader(); if (!file.exists()) { return; } BufferedImage image = ImageIO.read(file); LuminanceSource source = new BufferedImageLuminanceSource(image); Binarizer binarizer = new HybridBinarizer(source); BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer); Map hints = new HashMap(); hints.put(EncodeHintType.CHARACTER_SET, "UTF-8"); Result result = formatReader.decode(binaryBitmap, hints); System.out.println("解析结果 = " + result.toString()); System.out.println("二维码格式类型 = " + result.getBarcodeFormat()); System.out.println("二维码文本内容 = " + result.getText()); } catch (Exception e) { e.printStackTrace(); } }}
生成和解析相关工具类代码:
- import com.google.zxing.common.BitMatrix;
- import javax.imageio.ImageIO;
- import java.io.File;
- import java.io.OutputStream;
- import java.io.IOException;
- import java.awt.image.BufferedImage;
- public final class MatrixToImageWriter {
- private static final int BLACK = 0xFF000000;
- private static final int WHITE = 0xFFFFFFFF;
- private MatrixToImageWriter() {}
- public static BufferedImage toBufferedImage(BitMatrix matrix) {
- int width = matrix.getWidth();
- int height = matrix.getHeight();
- BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
- for (int x = 0; x < width; x++) {
- for (int y = 0; y < height; y++) {
- image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);
- }
- }
- return image;
- }
- public static void writeToFile(BitMatrix matrix, String format, File file)
- throws IOException {
- BufferedImage image = toBufferedImage(matrix);
- if (!ImageIO.write(image, format, file)) {
- throw new IOException(“Could not write an image of format ” + format + “ to ” + file);
- }
- }
- public static void writeToStream(BitMatrix matrix, String format, OutputStream stream)
- throws IOException {
- BufferedImage image = toBufferedImage(matrix);
- if (!ImageIO.write(image, format, stream)) {
- throw new IOException(“Could not write an image of format ” + format);
- }
- }
- }
import com.google.zxing.common.BitMatrix; import javax.imageio.ImageIO; import java.io.File; import java.io.OutputStream; import java.io.IOException; import java.awt.image.BufferedImage; public final class MatrixToImageWriter { private static final int BLACK = 0xFF000000; private static final int WHITE = 0xFFFFFFFF; private MatrixToImageWriter() {} public static BufferedImage toBufferedImage(BitMatrix matrix) { int width = matrix.getWidth(); int height = matrix.getHeight(); BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); for (int x = 0; x < width; x++) { for (int y = 0; y < height; y++) { image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE); } } return image; } public static void writeToFile(BitMatrix matrix, String format, File file) throws IOException { BufferedImage image = toBufferedImage(matrix); if (!ImageIO.write(image, format, file)) { throw new IOException("Could not write an image of format " + format + " to " + file); } } public static void writeToStream(BitMatrix matrix, String format, OutputStream stream) throws IOException { BufferedImage image = toBufferedImage(matrix); if (!ImageIO.write(image, format, stream)) { throw new IOException("Could not write an image of format " + format); } } }
- package com.util;
- import com.google.zxing.LuminanceSource;
- import java.awt.Graphics2D;
- import java.awt.geom.AffineTransform;
- import java.awt.image.BufferedImage;
- public final class BufferedImageLuminanceSource extends LuminanceSource {
- private final BufferedImage image;
- private final int left;
- private final int top;
- public BufferedImageLuminanceSource(BufferedImage image) {
- this(image, 0, 0, image.getWidth(), image.getHeight());
- }
- public BufferedImageLuminanceSource(BufferedImage image, int left, int top, int width, int height) {
- super(width, height);
- int sourceWidth = image.getWidth();
- int sourceHeight = image.getHeight();
- if (left + width > sourceWidth || top + height > sourceHeight) {
- throw new IllegalArgumentException(“Crop rectangle does not fit within image data.”);
- }
- for (int y = top; y < top + height; y++) {
- for (int x = left; x < left + width; x++) {
- if ((image.getRGB(x, y) & 0xFF000000) == 0) {
- image.setRGB(x, y, 0xFFFFFFFF); // = white
- }
- }
- }
- this.image = new BufferedImage(sourceWidth, sourceHeight, BufferedImage.TYPE_BYTE_GRAY);
- this.image.getGraphics().drawImage(image, 0, 0, null);
- this.left = left;
- this.top = top;
- }
- @Override
- public byte[] getRow(int y, byte[] row) {
- if (y < 0 || y >= getHeight()) {
- throw new IllegalArgumentException(“Requested row is outside the image: ” + y);
- }
- int width = getWidth();
- if (row == null || row.length < width) {
- row = new byte[width];
- }
- image.getRaster().getDataElements(left, top + y, width, 1, row);
- return row;
- }
- @Override
- public byte[] getMatrix() {
- int width = getWidth();
- int height = getHeight();
- int area = width * height;
- byte[] matrix = new byte[area];
- image.getRaster().getDataElements(left, top, width, height, matrix);
- return matrix;
- }
- @Override
- public boolean isCropSupported() {
- return true;
- }
- @Override
- public LuminanceSource crop(int left, int top, int width, int height) {
- return new BufferedImageLuminanceSource(image, this.left + left, this.top + top, width, height);
- }
- @Override
- public boolean isRotateSupported() {
- return true;
- }
- @Override
- public LuminanceSource rotateCounterClockwise() {
- int sourceWidth = image.getWidth();
- int sourceHeight = image.getHeight();
- AffineTransform transform = new AffineTransform(0.0, -1.0, 1.0, 0.0, 0.0, sourceWidth);
- BufferedImage rotatedImage = new BufferedImage(sourceHeight, sourceWidth, BufferedImage.TYPE_BYTE_GRAY);
- Graphics2D g = rotatedImage.createGraphics();
- g.drawImage(image, transform, null);
- g.dispose();
- int width = getWidth();
- return new BufferedImageLuminanceSource(rotatedImage, top, sourceWidth - (left + width), getHeight(), width);
- }
- }
package com.util;import com.google.zxing.LuminanceSource;import java.awt.Graphics2D;import java.awt.geom.AffineTransform;import java.awt.image.BufferedImage;public final class BufferedImageLuminanceSource extends LuminanceSource { private final BufferedImage image; private final int left; private final int top; public BufferedImageLuminanceSource(BufferedImage image) { this(image, 0, 0, image.getWidth(), image.getHeight()); } public BufferedImageLuminanceSource(BufferedImage image, int left, int top, int width, int height) { super(width, height); int sourceWidth = image.getWidth(); int sourceHeight = image.getHeight(); if (left + width > sourceWidth || top + height > sourceHeight) { throw new IllegalArgumentException("Crop rectangle does not fit within image data."); } for (int y = top; y < top + height; y++) { for (int x = left; x < left + width; x++) { if ((image.getRGB(x, y) & 0xFF000000) == 0) { image.setRGB(x, y, 0xFFFFFFFF); // = white } } } this.image = new BufferedImage(sourceWidth, sourceHeight, BufferedImage.TYPE_BYTE_GRAY); this.image.getGraphics().drawImage(image, 0, 0, null); this.left = left; this.top = top; } @Override public byte[] getRow(int y, byte[] row) { if (y < 0 || y >= getHeight()) { throw new IllegalArgumentException("Requested row is outside the image: " + y); } int width = getWidth(); if (row == null || row.length < width) { row = new byte[width]; } image.getRaster().getDataElements(left, top + y, width, 1, row); return row; } @Override public byte[] getMatrix() { int width = getWidth(); int height = getHeight(); int area = width * height; byte[] matrix = new byte[area]; image.getRaster().getDataElements(left, top, width, height, matrix); return matrix; } @Override public boolean isCropSupported() { return true; } @Override public LuminanceSource crop(int left, int top, int width, int height) { return new BufferedImageLuminanceSource(image, this.left + left, this.top + top, width, height); } @Override public boolean isRotateSupported() { return true; } @Override public LuminanceSource rotateCounterClockwise() { int sourceWidth = image.getWidth(); int sourceHeight = image.getHeight(); AffineTransform transform = new AffineTransform(0.0, -1.0, 1.0, 0.0, 0.0, sourceWidth); BufferedImage rotatedImage = new BufferedImage(sourceHeight, sourceWidth, BufferedImage.TYPE_BYTE_GRAY); Graphics2D g = rotatedImage.createGraphics(); g.drawImage(image, transform, null); g.dispose(); int width = getWidth(); return new BufferedImageLuminanceSource(rotatedImage, top, sourceWidth - (left + width), getHeight(), width); }}
生成的二维码如下图:
解析结果如下:
下面看QR CODE实例
- package com.qrcode.create;
- /**
- * @作者 Relieved
- * @创建日期 2014年11月7日
- * @描述 (利用QrCode生成二维码)
- * @版本 V 1.0
- */
- 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;
- /**
- * 二维码生成器
- */
- public class QRCodeEncoderHandler {
- /**
- * 生成二维码(QRCode)图片
- * @param content
- * @param imgPath
- */
- public void encoderQRCode(String content, String imgPath,int version) {
- 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’);
- //N代表数字,A代表字符a-Z,B代表其他字符
- qrcodeHandler.setQrcodeEncodeMode(’B’);
- //版本1为21*21矩阵,版本每增1,二维码的两个边长都增4;所以版本7为45*45的矩阵;最高版本为是40,是177*177的矩阵
- qrcodeHandler.setQrcodeVersion(version);
- int imgSize = 67 + 12 * (version- 1) ;
- System.out.println(content);
- byte[] contentBytes = content.getBytes(“gb2312”);
- BufferedImage bufImg = new BufferedImage(imgSize , imgSize ,BufferedImage.TYPE_INT_RGB);
- Graphics2D gs = bufImg.createGraphics();
- 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
- System.out.println(contentBytes.length);
- if (contentBytes.length > 0 && contentBytes.length < 130) {
- 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 {
- System.err.println(”QRCode content bytes length = ”
- + contentBytes.length + ” not in [ 0,130 ]. ”);
- }
- gs.dispose();
- bufImg.flush();
- File imgFile = new File(imgPath);
- // 生成二维码QRCode图片
- ImageIO.write(bufImg, ”png”, imgFile);
- } catch (Exception e) {
- e.printStackTrace();
- }
- }
- /**
- * @param args the command line arguments
- */
- public static void main(String[] args) {
- String imgPath = ”D:/二维码生成/Relieved_QRCode.png”;
- String content = ”http://blog.csdn.net/gao36951”;
- QRCodeEncoderHandler handler = new QRCodeEncoderHandler();
- handler.encoderQRCode(content, imgPath,8);
- System.out.println(”encoder QRcode success”);
- }
- }
package com.qrcode.create;/** * @作者 Relieved * @创建日期 2014年11月7日 * @描述 (利用QrCode生成二维码) * @版本 V 1.0 */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;/** * 二维码生成器 */public class QRCodeEncoderHandler { /** * 生成二维码(QRCode)图片 * @param content * @param imgPath */ public void encoderQRCode(String content, String imgPath,int version) { 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'); //N代表数字,A代表字符a-Z,B代表其他字符 qrcodeHandler.setQrcodeEncodeMode('B'); //版本1为21*21矩阵,版本每增1,二维码的两个边长都增4;所以版本7为45*45的矩阵;最高版本为是40,是177*177的矩阵 qrcodeHandler.setQrcodeVersion(version); int imgSize = 67 + 12 * (version- 1) ; System.out.println(content); byte[] contentBytes = content.getBytes("gb2312"); BufferedImage bufImg = new BufferedImage(imgSize , imgSize ,BufferedImage.TYPE_INT_RGB); Graphics2D gs = bufImg.createGraphics(); 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 System.out.println(contentBytes.length); if (contentBytes.length > 0 && contentBytes.length < 130) { 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 { System.err.println("QRCode content bytes length = " + contentBytes.length + " not in [ 0,130 ]. "); } gs.dispose(); bufImg.flush(); File imgFile = new File(imgPath); // 生成二维码QRCode图片 ImageIO.write(bufImg, "png", imgFile); } catch (Exception e) { e.printStackTrace(); } } /** * @param args the command line arguments */ public static void main(String[] args) { String imgPath = "D:/二维码生成/Relieved_QRCode.png"; String content = "http://blog.csdn.net/gao36951"; QRCodeEncoderHandler handler = new QRCodeEncoderHandler(); handler.encoderQRCode(content, imgPath,8); System.out.println("encoder QRcode success"); }}
生成二维码如下图
解析代码如下:
- package com.qrcode.create.decreate;
- /**
- * @作者 Relieved
- * @创建日期 2014年11月7日
- * @描述 (解析QrCode二维码)
- * @版本 V 1.0
- */
- 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;
- 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 = null;
- try {
- bufImg = ImageIO.read(imageFile);
- QRCodeDecoder decoder = new QRCodeDecoder();
- decodedData = new String(decoder.decode(new J2SEImage(bufImg)),“gb2312”);
- } 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:/二维码生成/Relieved_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);
- }
- }
- }
package com.qrcode.create.decreate;/** * @作者 Relieved * @创建日期 2014年11月7日 * @描述 (解析QrCode二维码) * @版本 V 1.0 */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;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 = null; try { bufImg = ImageIO.read(imageFile); QRCodeDecoder decoder = new QRCodeDecoder(); decodedData = new String(decoder.decode(new J2SEImage(bufImg)),"gb2312"); } 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:/二维码生成/Relieved_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); } }}
解析结果如下图:
</div>
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