Java生成读取条形码和二维码图片详解编程语言

ZxingTool.java        

package zxing; 
import com.google.zxing.BarcodeFormat; 
import com.google.zxing.Binarizer; 
import com.google.zxing.BinaryBitmap; 
import com.google.zxing.DecodeHintType; 
import com.google.zxing.EncodeHintType; 
import com.google.zxing.LuminanceSource; 
import com.google.zxing.MultiFormatReader; 
import com.google.zxing.MultiFormatWriter; 
import com.google.zxing.NotFoundException; 
import com.google.zxing.Result; 
import com.google.zxing.WriterException; 
import com.google.zxing.client.j2se.BufferedImageLuminanceSource; 
import com.google.zxing.client.j2se.MatrixToImageWriter; 
import com.google.zxing.common.BitMatrix; 
import com.google.zxing.common.HybridBinarizer; 
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel; 
import java.awt.Color; 
import java.awt.Graphics2D; 
import java.awt.Image; 
import java.awt.geom.AffineTransform; 
import java.awt.image.AffineTransformOp; 
import java.awt.image.BufferedImage; 
import java.io.File; 
import java.io.IOException; 
import java.util.HashMap; 
import java.util.Hashtable; 
import java.util.Map; 
import java.util.logging.Level; 
import java.util.logging.Logger; 
import javax.imageio.ImageIO; 
/** 
* 
* @author wiki 
*/ 
public class ZxingTool { 
private static final int IMAGE_WIDTH = 80;   
private static final int IMAGE_HEIGHT = 80;   
private static final int IMAGE_HALF_WIDTH = IMAGE_WIDTH / 2; 
private static final int FRAME_WIDTH = 2;   
/** 
* 生成条形码 
* @param contents 条形码内容 
* @param width 条形码宽度 
* @param height 条形码高度 
* @return  
*/ 
public static BufferedImage encodeBarcode(String contents, int width, int height){ 
int codeWidth = 3 + // start guard 
(7 * 6) + // left bars 
5 + // middle guard 
(7 * 6) + // right bars 
3; // end guard 
codeWidth = Math.max(codeWidth, width); 
BufferedImage barcode = null; 
try { 
BitMatrix bitMatrix = new MultiFormatWriter().encode(contents,BarcodeFormat.EAN_13, codeWidth, height, null);             
barcode= MatrixToImageWriter.toBufferedImage(bitMatrix); 
} catch (Exception e) { 
e.printStackTrace(); 
} 
return barcode; 
} 
/** 
* 解析读取条形码 
* @param barcodePath 条形码文件路径 
* @return  
*/ 
public static String decodeBarcode(String barcodePath){ 
BufferedImage image; 
Result result = null; 
try { 
image = ImageIO.read(new File(barcodePath)); 
if (image != null) { 
LuminanceSource source = new BufferedImageLuminanceSource(image); 
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source)); 
result = new MultiFormatReader().decode(bitmap, null); 
} 
return result.getText(); 
} catch (Exception e) { 
e.printStackTrace(); 
} 
return null; 
} 
/** 
* 生成二维码 
* @param context 二维码内容 
* @param width 二维码图片宽度 
* @param height 二维码图片高度 
* @return  
*/ 
public static BufferedImage encodeQRcode(String context,int width,int height){ 
BufferedImage qrCode=null; 
try { 
Hashtable hints= new Hashtable(); 
hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); 
BitMatrix bitMatrix = new MultiFormatWriter().encode(context, BarcodeFormat.QR_CODE, width, height,hints); 
qrCode = MatrixToImageWriter.toBufferedImage(bitMatrix); 
} catch (WriterException ex) { 
Logger.getLogger(ZxingTool.class.getName()).log(Level.SEVERE, null, ex); 
} 
return qrCode; 
} 
/** 
* 生成带有logo标志的二维码 
* @param context 二维码存储内容 
* @param width 二维码宽度 
* @param height 二维码高度 
* @param logoPath  二维码logo路径 
* @return  
*/ 
public static BufferedImage encodeLogoQRcode(String context,int width,int height,String logoPath){ 
BufferedImage logoQRcode=null; 
try { 
// 读取Logo图像   
BufferedImage logoImage = scale(logoPath, IMAGE_WIDTH,IMAGE_HEIGHT, true);   
int[][] srcPixels = new int[IMAGE_WIDTH][IMAGE_HEIGHT];   
for (int i = 0; i < logoImage.getWidth(); i++) {   
for (int j = 0; j < logoImage.getHeight(); j++) {   
srcPixels[i][j] = logoImage.getRGB(i, j);   
}   
} 
Map<EncodeHintType, Object> hint = new HashMap<EncodeHintType, Object>();   
hint.put(EncodeHintType.CHARACTER_SET, "utf-8");   
hint.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);   
BitMatrix bitMatrix = new MultiFormatWriter().encode(context, BarcodeFormat.QR_CODE, width, height,hint); 
// 二维矩阵转为一维像素数组   
int halfW = bitMatrix.getWidth() / 2;   
int halfH = bitMatrix.getHeight() / 2; 
int[] pixels = new int[width * height];   
for (int y = 0; y < bitMatrix.getHeight(); y++) {   
for (int x = 0; x < bitMatrix.getWidth(); x++) {   
// 读取图片   
if (x > halfW - IMAGE_HALF_WIDTH   
&& x < halfW + IMAGE_HALF_WIDTH   
&& y > halfH - IMAGE_HALF_WIDTH   
&& y < halfH + IMAGE_HALF_WIDTH) {   
pixels[y * width + x] = srcPixels[x - halfW   
+ IMAGE_HALF_WIDTH][y - halfH + IMAGE_HALF_WIDTH];   
}    
// 在图片四周形成边框   
else if ((x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH   
&& x < halfW - IMAGE_HALF_WIDTH + FRAME_WIDTH   
&& y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH   
+ IMAGE_HALF_WIDTH + FRAME_WIDTH)   
|| (x > halfW + IMAGE_HALF_WIDTH - FRAME_WIDTH   
&& x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH   
&& y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH   
+ IMAGE_HALF_WIDTH + FRAME_WIDTH)   
|| (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH   
&& x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH   
&& y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH   
- IMAGE_HALF_WIDTH + FRAME_WIDTH)   
|| (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH   
&& x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH   
&& y > halfH + IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH   
+ IMAGE_HALF_WIDTH + FRAME_WIDTH)) {   
pixels[y * width + x] = 0xfffffff;   
} else {   
// 此处可以修改二维码的颜色，可以分别制定二维码和背景的颜色；   
pixels[y * width + x] = bitMatrix.get(x, y) ? 0xff000000 : 0xfffffff;   
} 
}   
} 
logoQRcode = new BufferedImage(width, height,BufferedImage.TYPE_INT_RGB);   
logoQRcode.getRaster().setDataElements(0, 0, width, height, pixels);               
} catch (WriterException ex) { 
Logger.getLogger(ZxingTool.class.getName()).log(Level.SEVERE, null, ex); 
} 
return logoQRcode; 
} 
/** 
* 解析读取二维码 
* @param qrCodePath 二维码图片路径 
* @return  
*/ 
public static String decodeQRcode(String qrCodePath){ 
BufferedImage image;   
String qrCodeText = null; 
try {   
image = ImageIO.read(new File(qrCodePath));   
LuminanceSource source = new BufferedImageLuminanceSource(image);   
Binarizer binarizer = new HybridBinarizer(source);   
BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);   
Map<DecodeHintType, Object> hints = new HashMap<DecodeHintType, Object>();   
hints.put(DecodeHintType.CHARACTER_SET, "UTF-8"); 
// 对图像进行解码 
Result result = new MultiFormatReader().decode(binaryBitmap, hints);   
qrCodeText = result.getText(); 
} catch (IOException e) {   
e.printStackTrace();   
} catch (NotFoundException e) {   
e.printStackTrace();   
}   
return qrCodeText; 
} 
/** 
* 对图片进行缩放 
* @param imgPath 图片路径 
* @param width 图片缩放后的宽度 
* @param height 图片缩放后的高度 
* @param hasFiller 是否补白 
* @return  
*/ 
public static BufferedImage scale(String imgPath,int width,int height,boolean hasFiller){ 
double ratio = 0.0; // 缩放比例   
File file = new File(imgPath);   
BufferedImage srcImage = null;   
try { 
srcImage = ImageIO.read(file); 
} catch (IOException ex) { 
Logger.getLogger(ZxingTool.class.getName()).log(Level.SEVERE, null, ex); 
} 
Image finalImage;   
finalImage = srcImage.getScaledInstance(width, height,BufferedImage.SCALE_SMOOTH); 
// 计算比例   
if ((srcImage.getHeight() > height) || (srcImage.getWidth() > width)) {   
if (srcImage.getHeight() > srcImage.getWidth()) {   
ratio = (new Integer(height)).doubleValue()/ srcImage.getHeight();   
} else {   
ratio = (new Integer(width)).doubleValue()/ srcImage.getWidth();   
}   
AffineTransformOp op = new AffineTransformOp(AffineTransform.getScaleInstance(ratio, ratio), null);   
finalImage = op.filter(srcImage, null);   
}   
if (hasFiller) {// 补白   
BufferedImage image = new BufferedImage(width, height,BufferedImage.TYPE_INT_RGB);   
Graphics2D graphic = image.createGraphics();   
graphic.setColor(Color.white);   
graphic.fillRect(0, 0, width, height);   
if (width == finalImage.getWidth(null)){   
graphic.drawImage(finalImage, 0,(height - finalImage.getHeight(null))/2,finalImage.getWidth(null), finalImage.getHeight(null),Color.white, null);   
}else{   
graphic.drawImage(finalImage,(width - finalImage.getWidth(null))/2,0,finalImage.getWidth(null), finalImage.getHeight(null),Color.white, null);   
graphic.dispose();   
finalImage = image;   
} 
}   
return (BufferedImage) finalImage; 
} 
}