Java zxing generation of two-dimensional code learning __java

Java zxing generation of two-dimensional code learning

1. Generate two-dimensional code without logo

Import Java.awt.image.BufferedImage;
Import Java.io.File;

Import java.io.IOException;

Import Javax.imageio.ImageIO;
Import Com.google.zxing.BarcodeFormat;
Import Com.google.zxing.Binarizer;
Import Com.google.zxing.BinaryBitmap;
Import com.google.zxing.ChecksumException;
Import com.google.zxing.FormatException;
Import Com.google.zxing.LuminanceSource;
Import com.google.zxing.NotFoundException;
Import Com.google.zxing.Result;
Import com.google.zxing.WriterException;
Import Com.google.zxing.client.j2se.BufferedImageLuminanceSource;
Import Com.google.zxing.client.j2se.MatrixToImageWriter;
Import Com.google.zxing.common.BitMatrix;
Import Com.google.zxing.common.HybridBinarizer;
Import Com.google.zxing.qrcode.QRCodeReader;



Import Com.google.zxing.qrcode.QRCodeWriter;
		public class Qrcodewithoutlogo {public static void main (string[] args) {String content = "content";
			try {content = new String (content.getbytes ("UTF-8")); String ImagePath = "c:\\users\\administrator\\desktop\\Ssx.png ";
			File File = new file (ImagePath);
			Qrcodewriter writer = new Qrcodewriter ();
			Generate two-dimensional code ↓bitmatrix matrix = Writer.encode (content,barcodeformat.qr_code,400,400);
			Matrixtoimagewriter.writetofile (Matrix, "PNG", file);
			Generate two-dimensional code ↑//read two-dimensional code ↓qrcodereader reader = new Qrcodereader ();
			BufferedImage image = Imageio.read (file);
			Luminancesource Source = new Bufferedimageluminancesource (image);
			Binarizer Binarizer = new Hybridbinarizer (source);
			Binarybitmap Imagebinarybitmap = new Binarybitmap (Binarizer);
			Result result = Reader.decode (IMAGEBINARYBITMAP);
			System.out.println (Result.tostring ());
			System.out.println (Result.getbarcodeformat ());
			System.out.println (Result.gettext ()); Read two-dimensional code ↑ catch (writerexception| IOException | notfoundexception | checksumexception |
		FormatException e) {e.printstacktrace (); }
	}
}

2. Generate a two-dimensional code with logo

Reference: http://blog.csdn.net/lcx46/article/details/13626841

Import Java.awt.Color;
Import Java.awt.Graphics2D;
Import Java.awt.Image;
Import Java.awt.geom.AffineTransform;
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 Qrcodewithlogo {//logo picture width private static final int image_width = 80;
	
	private static final int image_height = 80;
	
	private static final int image_half_width = IMAGE_WIDTH/2;

	Padding width private static final int frame_width = 2;

	Two-dimensional code writer private static Multiformatwriter mutiwriter = new Multiformatwriter (); public static void Encode (string content, int width, int height, string srciMagepath, String Destimagepath) {try {imageio.write (content, width, height, srcimagepath), "PNG", n
		EW File (Destimagepath));
		catch (IOException e) {e.printstacktrace ();
		catch (Writerexception e) {e.printstacktrace (); } private static BufferedImage Genbarcode (string content, int width, int height, String srcimagepath) throws Write Rexception, IOException {//Read source image BufferedImage Scaleimage = scale (Srcimagepath, Image_width, Image_height, tr
		UE);
		int[][] Srcpixels = new Int[image_width][image_height]; for (int i = 0; i < scaleimage.getwidth (); i++) {for (int j = 0; J < Scaleimage.getheight (); j + +) {Srcpixel
			S[I][J] = Scaleimage.getrgb (i, j);
		} map<encodehinttype, object> hint = new Hashmap<encodehinttype, object> ();
		Hint.put (Encodehinttype.character_set, "utf-8");
		Hint.put (Encodehinttype.error_correction, ErrorCorrectionLevel.H); Generate a two-dimensional code Bitmatrix matrix = mutiwriter.encode (content,Barcodeformat.qr_code, width, height, hint);
		The two-dimensional matrix is converted into one dimensional pixel Group 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 (), + + +) {//) read picture if ( X > Halfw-image_half_width && x < HALFW + image_half_width && y > Halfh-image_hal F_width && y < HALFH + image_half_width) {Pixels[y * WIDTH + x] = SRCPIXELS[X-HALFW + imag
				E_HALF_WIDTH][Y-HALFH + image_half_width]; ///In picture four weeks to form a border 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_h Alf_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 &A
						mp;& 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 &A mp;& y > halfh + image_half_width-frame_width && y < HALFH + image_half_width + frame_width)
				{Pixels[y * width + x] = 0XFFFFFFF; else {//Here you can modify the color of the two-dimensional code, you can set the color of two-dimensional code and background respectively; Pixels[y * width + x] = Matrix.get (x, y)? 0xff000000:0xfffff
				ff
		}} bufferedimage image = New BufferedImage (width, height, bufferedimage.type_int_rgb);

		Image.getraster (). setDataElements (0, 0, width, height, pixels);
	return image;
	}

	/** * To scale the incoming original image by height and width, generate the icon that meets the requirement * * @param srcimagefile * source file Address * @param height * Target height * @param width * @param hasfiller * If the ratio is incorrect if filler is required: true for filler;
	 False is not filler; * @throws IOException */private static BufferedImage scale (String srcimagefile, int height, int width, Boolean hasf
		Iller) throws IOException {double ratio = 0.0;//Scaling File = new file (srcimagefile);
		BufferedImage srcimage = imageio.read (file);
		Image destimage = srcimage.getscaledinstance (width, height, bufferedimage.scale_smooth); Calculate scale 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) {//filler bufferedimage image = new BufferedImage (width, height, bufferedimage.type_int_rgb);
			Graphics2D graphic = Image.creategraphics ();
			Graphic.setcolor (Color.White);
			Graphic.fillrect (0, 0, 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); else Graphic.drawimage (Destimage, (Width-destimage.getwidth (NULL))/2, 0, destimage.getwidth (null), des
			Timage.getheight (null), color.white, NULL);
			Graphic.dispose ();
		Destimage = image;
	Return (bufferedimage) destimage; public static void Main (string[] args) {Qrcodewithlogo.encode ("http://www.baidu.com", +, "c:/users/admin")
	Istrator/desktop/src.png "," c:/users/administrator/desktop/des.png ");
 }
}