使用Zxing实现二维码生成器内嵌图片，具有一定的参考价值，具体如下：
基本思路是先使用zxing生成的二维码图片，然后读取图片，在其中插入图标，然后整个输出图片。
最近的项目中需要生成二维码，找了几个例子综合下，做出了最后的效果，二维码可以生成图片格式（jpg等）或者在web页面上显示，此片文章仅作记录，雷同之处多多，包涵。。。。
注：需要Zxing包装的工具类，大概的流程是读取内嵌的图片，将内容转化成二维码，将图片内嵌到二维码中，出图。
下面是完整代码：
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import Java.awt.BasicStroke;import java.awt.Color;import java.awt.Graphics2D;import java.awt.Image;import java.awt.Shape;import java.awt.geom.AffineTransform;import java.awt.geom.RoundRectangle2D;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.Map;import javax.imageio.ImageIO;import com.google.zxing.BarcodeFormat;import com.google.zxing.EncodeHintType;import com.google.zxing.MultiFormatWriter;import com.google.zxing.WriterException;import com.google.zxing.common.BitMatrix;import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;public class Zxing {private static final int BLACK = 0xFF000000;private static final int WHITE = 0xFFFFFFFF;// 图片宽度的一般 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; // 二维码写码器 private static MultiFormatWriter mutiWriter = new MultiFormatWriter(); public static void main(String[] args) {try {//BitMatrix bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, 400, 400,hints);String content="13400000000";//二维码的内容BufferedImage image = genBarcode(content, 400, 400, "F:\\amazed.png"); if (!ImageIO.write(image, "jpg", new File("F:\\2122.jpg"))) { throw new IOException("Could not write an image of format "); } /** //将上面的代码换成此处，使用流读入到页面即可OutputStream os = response.getOutputStream(); if (!ImageIO.write(image, "jpg",os)) { throw new IOException("Could not write an image of format "); } **/} catch (WriterException e) {e.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}private 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;}private static BufferedImage genBarcode(String content, int width, int height, String srcImagePath) throws WriterException, IOException { // 读取源图像 BufferedImage scaleImage = scale(srcImagePath, IMAGE_WIDTH, IMAGE_HEIGHT, true); int[][] srcPixels = new int[IMAGE_WIDTH][IMAGE_HEIGHT]; for (int i = 0; i < scaleImage.getWidth(); i++) { for (int j = 0; j < scaleImage.getHeight(); j++) { srcPixels[i][j] = scaleImage.getRGB(i, j); } } Map<EncodeHintType, Object> hint = new HashMap<EncodeHintType, Object>(); hint.put(EncodeHintType.CHARACTER_SET, "utf-8"); //内容编码 hint.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);//错误等级 hint.put(EncodeHintType.MARGIN, 1); //设置二维码外边框的空白区域的宽度 // 生成二维码 BitMatrix matrix = mutiWriter.encode(content, BarcodeFormat.QR_CODE, width, height, hint); // 二维矩阵转为一维像素数组 int halfW = matrix.getWidth() / 2; int halfH = matrix.getHeight() / 2; int[] pixels = new int[width * height]; for (int y = 0; y < matrix.getHeight(); y++) { for (int x = 0; x < matrix.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] = matrix.get(x, y) ? 0xff000000 : 0xfffffff; } } } BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); image.getRaster().setDataElements(0, 0, width, height, pixels); return image; } /** * 把传入的原始图像按高度和宽度进行缩放，生成符合要求的图标 * * @param srcImageFile * 源文件地址 * @param height * 目标高度 * @param width * 目标宽度 * @param hasFiller * 比例不对时是否需要补白：true为补白; false为不补白; * @throws IOException */ private static BufferedImage scale(String srcImageFile, int height, int width, boolean hasFiller) throws IOException { double ratio = 0.0; // 缩放比例 File file = new File(srcImageFile); BufferedImage srcImage = ImageIO.read(file); Image destImage = 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); destImage = 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.PINK); graphic.fillRect(10, 10, width, height); graphic.drawRect(100, 360, width, height); if (width == destImage.getWidth(null)) { graphic.drawImage(destImage, 0, (height - destImage.getHeight(null)) / 2, destImage.getWidth(null), destImage.getHeight(null), Color.white, null); Shape shape = new RoundRectangle2D.Float(0, (height - destImage.getHeight(null)) / 2, width, width, 20, 20); graphic.setStroke(new BasicStroke(5f)); graphic.draw(shape); } else { graphic.drawImage(destImage, (width - destImage.getWidth(null)) / 2, 0, destImage.getWidth(null), destImage.getHeight(null), Color.white, null); Shape shape = new RoundRectangle2D.Float((width - destImage.getWidth(null)) / 2, 0, width, width, 20, 20); graphic.setStroke(new BasicStroke(5f)); graphic.draw(shape); } graphic.dispose(); destImage = image; } return (BufferedImage) destImage; } } |
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