使用Zxing生成带有logo的二维码

本文介绍通过使用Zxing生成二维码，首先就是导入引用的jar文件，我是采用的Zxing-core-3.2.0.jar生成二维码

见一个java项目将jar文件添加到项目里面。代码易懂我直接上代码了。

1.创建BufferedImageLuminanceSource类，并继承LuminanceSource这个父类

package printf.code;

import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;

import com.google.zxing.LuminanceSource;

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);  
	    }  

}

2.生成你想要的二维码

package printf.code;

import java.awt.BasicStroke;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Shape;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.OutputStream;
import java.util.Hashtable;
import java.util.Random;

import javax.imageio.ImageIO;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.Result;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

public class Test {
	
	
    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 hints = new Hashtable();  
        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  
        Test.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 = Test.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: mmm333zzz520@163.com 
     * @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 {  
    	Test.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 {  
    	Test.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 {  
    	Test.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 = Test.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 {  
    	Test.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 hints = new Hashtable();  
        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 Test.decode(new File(path));  
    }  
  
    public static void main(String[] args) throws Exception {  
        String text = "http://blog.youkuaiyun.com/zhao13083837081";  
        Test.encode(text, "c:/zbq.jpg", "c:/a/", true);  
    }  
	

}

3.效果图