Fork me on GitHub

Java 生成Zxing二维码(带Logo)

发表于 | 分类于 |

java 利用Zxing 生成二维码(带Logo)

Zxing是Google提供的关于条码（一维码、二维码）的解析工具，提供了二维码的生成与解析的方法，现在我简单介绍一下使用Java利用Zxing生成与解析二维码

1、二维码生成

  1. 准备一张生成logo的图片地址:D:\Documents\Pictures\lovewallpaper\test.jpg
  2. 需要保存二维码的地址:d:\logo.jpg
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
public class EncodeTest {	
	
	public static BufferedImage Encode_QR_CODE(String contents,BufferedImage logo) throws IOException, WriterException{
		int width = 342; // 二维码图片宽度
		int height = 342; // 二维码图片高度
		
		//String format = "gif";// 二维码的图片格式 gif
		
		Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
		 // 指定纠错等级,纠错级别（L 7%、M 15%、Q 25%、H 30%）
		hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
		// 内容所使用字符集编码
		hints.put(EncodeHintType.CHARACTER_SET, "utf-8");	
		hints.put(EncodeHintType.MAX_SIZE, 400);//设置图片的最大值
	    hints.put(EncodeHintType.MIN_SIZE, 100);//设置图片的最小值
		hints.put(EncodeHintType.MARGIN, 4);//设置二维码边的空度，非负数
		
		BitMatrix bitMatrix = new MultiFormatWriter().encode(contents,//要编码的内容
				//编码类型，目前zxing支持：Aztec 2D,CODABAR 1D format,Code 39 1D,Code 93 1D ,Code 128 1D,
				//Data Matrix 2D , EAN-8 1D,EAN-13 1D,ITF (Interleaved Two of Five) 1D,
				//MaxiCode 2D barcode,PDF417,QR Code 2D,RSS 14,RSS EXPANDED,UPC-A 1D,UPC-E 1D,UPC/EAN extension,UPC_EAN_EXTENSION
				BarcodeFormat.QR_CODE,
				width, //条形码的宽度
				height, //条形码的高度
				hints);//生成条形码时的一些配置,此项可选	
		if(null == logo){
			return MatrixToImageWriter.toBufferedImage(bitMatrix);
		}				
		
		return LogoConfig.LogoMatrix(MatrixToImageWriter.toBufferedImage(bitMatrix),logo);
	}
	
}

看看LogoConfig类：

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
public class LogoConfig {
	
	/**
	 * 设置 logo 
	 * @param matrixImage 源二维码图片
	 * @return 返回带有logo的二维码图片
	 * @throws IOException
	 * @author Administrator sangwenhao
	 */
     public static BufferedImage LogoMatrix(BufferedImage matrixImage,BufferedImage logo) throws IOException{
    	 /**
          * 读取二维码图片，并构建绘图对象
          */
         Graphics2D g2 = matrixImage.createGraphics();
    	 
    	 int matrixWidth = matrixImage.getWidth();
    	 int matrixHeigh = matrixImage.getHeight();

         //开始绘制图片
         g2.drawImage(logo,matrixWidth/5*2,matrixHeigh/5*2, matrixWidth/5, matrixHeigh/5, null);//绘制     
         BasicStroke stroke = new BasicStroke(5,BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND); 
         g2.setStroke(stroke);// 设置笔画对象
         //指定弧度的圆角矩形
         RoundRectangle2D.Float round = new RoundRectangle2D.Float(matrixWidth/5*2, matrixHeigh/5*2, matrixWidth/5, matrixHeigh/5,20,20);
         g2.setColor(Color.white);
         g2.draw(round);// 绘制圆弧矩形
         
         //设置logo 有一道灰色边框
         BasicStroke stroke2 = new BasicStroke(1,BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND); 
         g2.setStroke(stroke2);// 设置笔画对象
         RoundRectangle2D.Float round2 = new RoundRectangle2D.Float(matrixWidth/5*2+2, matrixHeigh/5*2+2, matrixWidth/5-4, matrixHeigh/5-4,20,20);
         g2.setColor(new Color(128,128,128));
         g2.draw(round2);// 绘制圆弧矩形
         
         g2.dispose();
         matrixImage.flush() ;
         return matrixImage ;
     }

}

然后测试类生成一个二维码:

1
2
3
4
5
6
7
8
9
try {
    BufferedImage logo=null;
	logo = ImageIO.read(new File("D:\\Documents\\Pictures\\lovewallpaper\\test.jpg"));
	BufferedImage image = EncodeTest.Encode_QR_CODE("https://www.baidu.com",logo);
	ImageIO.write(image, "jpg", new File("d:\\logo.jpg"));
     
 } catch (Exception e) {
     e.printStackTrace();
 }

这样就生成了一个带logo的二维码，还是挺简单的，使用可以扫描的工具;因为内容是一个链接所以也没可能会跳转到这个链接。

2、解析二维码和其他的解析方式一样

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
BufferedImageLuminanceSource 
 import com.google.zxing.LuminanceSource;
 
 import java.awt.Graphics2D;
 import java.awt.geom.AffineTransform;
 import java.awt.image.BufferedImage;
 
 public final 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;
   }
 
   @Override
   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;
   }
 
   @Override
   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;
   }
 
   @Override
   public boolean isCropSupported() {
     return true;
   }
 
   @Override
   public LuminanceSource crop(int left, int top, int width, int height) {
     return new BufferedImageLuminanceSource(image, this.left + left, this.top + top, width, height);
   }
 
   @Override
   public boolean isRotateSupported() {
     return true;
   }
 
   @Override
   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);
   }
 
 }

测试：

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
public static void main(String[] args) throws IOException, NotFoundException {
        MultiFormatReader formatReader = new MultiFormatReader();
       String filePath = "d:\\logo.jpg";
       File file = new File(filePath);
       BufferedImage image = ImageIO.read(file);
       LuminanceSource source = new BufferedImageLuminanceSource(image);
       Binarizer binarizer = new HybridBinarizer(source);
       BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);
       Map hints = new HashMap();
       hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
       Result result = formatReader.decode(binaryBitmap,hints);

       System.out.println("result = "+ result.toString());
       System.out.println("resultFormat = "+ result.getBarcodeFormat());
       System.out.println("resultText = "+ result.getText());
   }
-------------���Ľ�����л�����Ķ�-------------
分享到： 收藏夹 复制网址 邮件 微信 QQ空间 腾讯微博 豆瓣 一键分享 更多