Java生成内嵌logo的二维码

  1 package ImagePackage;
  2 
  3 import java.awt.AlphaComposite;
  4 import java.awt.Graphics2D;
  5 import java.awt.image.BufferedImage;
  6 import java.io.File;
  7 import java.io.IOException;
  8 
  9 import javax.imageio.ImageIO;
 10 
 11 import com.google.zxing.BarcodeFormat;
 12 import com.google.zxing.BinaryBitmap;
 13 import com.google.zxing.MultiFormatReader;
 14 import com.google.zxing.MultiFormatWriter;
 15 import com.google.zxing.NotFoundException;
 16 import com.google.zxing.Result;
 17 import com.google.zxing.WriterException;
 18 import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
 19 import com.google.zxing.client.j2se.MatrixToImageConfig;
 20 import com.google.zxing.client.j2se.MatrixToImageWriter;
 21 import com.google.zxing.common.BitMatrix;
 22 import com.google.zxing.common.HybridBinarizer;
 23 
 24 public class QrcodeUtil {
 25 
 26     
 27     public static void genQrcode(int width,int height,String format,String url,String savePath){
 28         try {
 29             BitMatrix bitMatrix= new MultiFormatWriter().encode(url, BarcodeFormat.QR_CODE, width, height);
 30             // 生成的二维码图片默认背景为白色,前景为黑色,但是在加入logo图像后会导致logo也变为黑白色,至于是什么原因还没有仔细去读它的源码
 31             // 所以这里对其第一个参数黑色将ZXing默认的前景色0xFF000000稍微改了一下0xFF000001,最终效果也是白色背景黑色前景的二维码,且logo颜色保持原有不变
 32             MatrixToImageConfig config = new MatrixToImageConfig(0xFF000001, 0xFFFFFFFF);
 33             // 这里要显式指定MatrixToImageConfig,否则还会按照默认处理将logo图像也变为黑白色(如果打算加logo的话,反之则不须传MatrixToImageConfig参数)
 34             // 开始画二维码
 35             BufferedImage barCodeImage = MatrixToImageWriter.toBufferedImage(bitMatrix,config);
 36             generateSaveFile(barCodeImage,savePath);
 37             System.out.println("qrcode write...");
 38         }catch (WriterException e) {
 39             e.printStackTrace();
 40         }
 41         
 42     }
 43     
 44      /**
 45      * 输出图片
 46      */
 47     public static void generateSaveFile(BufferedImage buffImg, String savePath) {
 48         int temp = savePath.lastIndexOf(".") + 1;
 49         try {
 50             File outFile = new File(savePath);
 51             if(!outFile.exists()){
 52                 outFile.createNewFile();
 53             }
 54             ImageIO.write(buffImg, savePath.substring(temp), outFile);
 55             System.out.println("ImageIO write...");
 56         } catch (IOException e) {
 57             e.printStackTrace();
 58         }
 59     }
 60     
 61     
 62     
 63     /**
 64      * 为二维码图片增加logo头像
 65      * @see 其原理类似于图片加水印
 66      * @param image 二维码图片转化的BufferedImage对象
 67      * @param logoImage logo头像转化的BufferedImage对象
 68      */
 69     public static BufferedImage overlapImage(BufferedImage image, BufferedImage logoImage){
 70         int logoWidth = image.getWidth() / 5; // 设置logo图片宽度为二维码图片的五分之一
 71         int logoHeight = image.getHeight() / 5; // 设置logo图片高度为二维码图片的五分之一
 72         int logoX = (image.getWidth() - logoWidth) / 2; // 设置logo图片的位置,这里令其居中
 73         int logoY = (image.getHeight() - logoHeight) / 2; // 设置logo图片的位置,这里令其居中
 74         Graphics2D graphics = image.createGraphics();
 75         // 在图形和图像中实现混合和透明效果
 76         graphics.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, 1.0f));
 77         graphics.drawImage(logoImage, logoX, logoY, logoWidth, logoHeight, null);
 78         graphics.dispose();
 79         return image;
 80     } 
 81     
 82     
 83     
 84     public static void genQrcodeTest() {
 85         int width = 300;
 86         int height = 300;
 87         String format = "png";
 88         String url = "https://www.baidu.com";
 89         String savePath = "D://test//new.png";
 90         genQrcode(width, height, format, url, savePath);
 91 
 92     }
 93 
 94     public static void logoQrcodeTest(){
 95         
 96         try{
 97             String imagePath = "D://test//new.png";
 98             File f = new File(imagePath);
 99             BufferedImage image = ImageIO.read(f);
100             String logoPath = "D://test//logo.png";
101             File logof = new File(logoPath);
102             BufferedImage logoImage = ImageIO.read(logof);
103             
104             BufferedImage qrCodeImage =  overlapImage(image,logoImage);
105             String newPath = "D://test//logoNew.png";    //内嵌logo后新二维码地址
106             generateSaveFile(qrCodeImage,newPath);
107 
108         }catch(Exception e){
109             e.printStackTrace();
110         }
111     }
112     
113     
114     public static void main(String[] args) {
115         String savePath = "D://test//logoNew.png";
116         //生成二维码
117         genQrcodeTest();
118 
119         //二维码内嵌logo
120         logoQrcodeTest();
121         
122     }
123 
124 }