制作、解析带logo的二维码

用DecoderQRCode来解析带logo的二维码，发现报错，解析不了，于是便又查资料，找到了更强大的制作二维码

工具：GooleZXing

首先下GooleZXing的jar包。

----------------------------------------生成二维码------------------------------------------------

public class GooleZXingQRCodeUtil {

private static final String CHARSET = "utf-8"; 
private static final String FORMAT_NAME = "JPG"; 
// 二维码尺寸 
private static final int QRCODE_SIZE = 300; 
// LOGO宽度 
private static final int WIDTH = 60; 
// LOGO高度 
private static final int HEIGHT = 60;

private static BufferedImage createImage(String content, String imgPath, 
boolean needCompress) throws Exception { 
Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>(); 
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H); 
hints.put(EncodeHintType.CHARACTER_SET, CHARSET); 
//hints.put(EncodeHintType.MARGIN, 1); 
BitMatrix bitMatrix = new MultiFormatWriter().encode(content, 
BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints); 
int width = bitMatrix.getWidth(); 
int height = bitMatrix.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, bitMatrix.get(x, y) ? 0xFF000000 
: 0xFFFFFFFF); 
} 
} 
if (imgPath == null || "".equals(imgPath)) { 
return image; 
} 
// 插入图片 
GooleZXingQRCodeUtil.insertImage(image, imgPath, needCompress); 
return image; 
}

/** 
* 插入LOGO 
* 
* @param source 
* 二维码图片 
* @param imgPath 
* LOGO图片地址 
* @param needCompress 
* 是否压缩 
* @throws Exception 
*/ 
private static void insertImage(BufferedImage source, String imgPath, 
boolean needCompress) throws Exception { 
File file = new File(imgPath); 
if (!file.exists()) { 
System.err.println(""+imgPath+" 该文件不存在！"); 
return; 
} 
Image src = ImageIO.read(new File(imgPath)); 
int width = src.getWidth(null); 
int height = src.getHeight(null); 
if (needCompress) { // 压缩LOGO 
if (width > WIDTH) { 
width = WIDTH; 
} 
if (height > HEIGHT) { 
height = HEIGHT; 
} 
Image image = src.getScaledInstance(width, height, 
Image.SCALE_SMOOTH); 
BufferedImage tag = new BufferedImage(width, height, 
BufferedImage.TYPE_INT_RGB); 
Graphics g = tag.getGraphics(); 
g.drawImage(image, 0, 0, null); // 绘制缩小后的图 
g.dispose(); 
src = image; 
} 
// 插入LOGO 
Graphics2D graph = source.createGraphics(); 
int x = (QRCODE_SIZE - width) / 2; 
int y = (QRCODE_SIZE - height) / 2; 
graph.drawImage(src, x, y, width, height, null); 
Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6); 
graph.setStroke(new BasicStroke(3f)); 
graph.draw(shape); 
graph.dispose(); 
}

/** 
* 生成二维码(内嵌LOGO) 
* 
* @param content 
* 内容 
* @param imgPath 
* LOGO地址 
* @param destPath 
* 存放目录 
* @param needCompress 
* 是否压缩LOGO 
* @throws Exception 
*/ 
public static void encode(String content, String imgPath, String destPath, 
boolean needCompress) throws Exception { 
BufferedImage image = GooleZXingQRCodeUtil.createImage(content, imgPath, 
needCompress); 
mkdirs(destPath); 
String file = new Random().nextInt(99999999)+".jpg"; 
ImageIO.write(image, FORMAT_NAME, new File(destPath+"/"+file)); 
}

/** 
* 当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir．(mkdir如果父目录不存在则会抛出异常) 
* @author lanyuan 
* Email: [e-mail] 
* @date 2013-12-11 上午10:16:36 
* @param destPath 存放目录 
*/ 
public static void mkdirs(String destPath) { 
File file =new File(destPath); 
//当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir．(mkdir如果父目录不存在则会抛出异常) 
if (!file.exists() && !file.isDirectory()) { 
file.mkdirs(); 
} 
}

/** 
* 生成二维码(内嵌LOGO) 
* 
* @param content 
* 内容 
* @param imgPath 
* LOGO地址 
* @param destPath 
* 存储地址 
* @throws Exception 
*/ 
public static void encode(String content, String imgPath, String destPath) 
throws Exception { 
GooleZXingQRCodeUtil.encode(content, imgPath, destPath, false); 
}

/** 
* 生成二维码 
* 
* @param content 
* 内容 
* @param destPath 
* 存储地址 
* @param needCompress 
* 是否压缩LOGO 
* @throws Exception 
*/ 
public static void encode(String content, String destPath, 
boolean needCompress) throws Exception { 
GooleZXingQRCodeUtil.encode(content, null, destPath, needCompress); 
}

/** 
* 生成二维码 
* 
* @param content 
* 内容 
* @param destPath 
* 存储地址 
* @throws Exception 
*/ 
public static void encode(String content, String destPath) throws Exception { 
GooleZXingQRCodeUtil.encode(content, null, destPath, false); 
}

/** 
* 生成二维码(内嵌LOGO) 
* 
* @param content 
* 内容 
* @param imgPath 
* LOGO地址 
* @param output 
* 输出流 
* @param needCompress 
* 是否压缩LOGO 
* @throws Exception 
*/ 
public static void encode(String content, String imgPath, 
OutputStream output, boolean needCompress) throws Exception { 
BufferedImage image = GooleZXingQRCodeUtil.createImage(content, imgPath, 
needCompress); 
ImageIO.write(image, FORMAT_NAME, output); 
}

/** 
* 生成二维码 
* 
* @param content 
* 内容 
* @param output 
* 输出流 
* @throws Exception 
*/ 
public static void encode(String content, OutputStream output) 
throws Exception { 
GooleZXingQRCodeUtil.encode(content, null, output, false); 
}

/** 
* 解析二维码 
* 
* @param file 
* 二维码图片 
* @return 
* @throws Exception 
*/ 
public static String decode(File file) throws Exception { 
BufferedImage image; 
image = ImageIO.read(file); 
if (image == null) { 
return null; 
} 
BufferedImageLuminanceSource source = new BufferedImageLuminanceSource( 
image); 
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source)); 
Result result; 
Hashtable<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>(); 
hints.put(DecodeHintType.CHARACTER_SET, CHARSET); 
result = new MultiFormatReader().decode(bitmap, hints); 
String resultStr = result.getText(); 
return resultStr; 
}

/** 
* 解析二维码 
* 
* @param path 
* 二维码图片地址 
* @return 
* @throws Exception 
*/ 
public static String decode(String path) throws Exception { 
return GooleZXingQRCodeUtil.decode(new File(path)); 
}

public static void main(String[] args) throws Exception { 
// String text = "I'm a Shiny boy！！"; 
// GooleZXingQRCodeUtil.encode(text, "F:/test/twocode/123.jpg", "F:/test/twocode/", true);

String imgPath = "F:/test/twocode/girl.png";
String rs=GooleZXingQRCodeUtil.decode(imgPath);
System.out.println("解析结果="+"\n"+rs);

} 
}

-----------------------------------------解析二维码（可带logo图片）-------------------------------------

public 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; 
}

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; 
}

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; 
}

public boolean isCropSupported() { 
return true; 
}

public LuminanceSource crop(int left, int top, int width, int height) { 
return new BufferedImageLuminanceSource(image, this.left + left, 
this.top + top, width, height); 
}

public boolean isRotateSupported() { 
return true; 
}

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); 
} 
}

到此为止，利用Zxing生成和解析二维码就讲述演示完毕，主要为自己做备忘，同时方便有需要的人。呵呵！