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，
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();
}
}
}
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);
}
}
解析结果如下：
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.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);
}
}
}
