Encoding and decoding of two-dimensional codes--class __ Code

Required JAR Package: Qrcode.jar

Effect Chart:

The following are the auxiliary classes I encapsulate, and the APIs provided are:

(1) Encode (String str);

(2) Encode (String str,file f);

(3) Encode (String str,outputstream out);

(4) Decode (File f);

(5) Decode (InputStream in);

Package Org.xiazdong;
Import Java.awt.Color;
Import Java.awt.Graphics2D;
Import Java.awt.image.BufferedImage;
Import Java.io.File;
Import Java.io.InputStream;
Import Java.io.OutputStream;
Import Javax.imageio.ImageIO;
Import Jp.sourceforge.qrcode.QRCodeDecoder;
Import Jp.sourceforge.qrcode.data.QRCodeImage;

Import Com.swetake.util.Qrcode; Public final class Qrcodeutils {private Qrcodeutils () {} public static bufferedimage encode (String str) throws Excep
		tion {//1. Create QRCode qrcode qrcode = new QRCode ();
		Qrcode.setqrcodeerrorcorrect (' M ');
		Qrcode.setqrcodeencodemode (' B ');
		Qrcode.setqrcodeversion (7);
		2. Number with UTF-8 encoded byte[] D = str.getbytes ("UTF-8");
		BufferedImage image = New BufferedImage (139, 139, BUFFEREDIMAGE.TYPE_INT_RGB);
		Graphics2D g = image.creategraphics ();
		G.setbackground (Color.White);
		G.clearrect (0, 0, 139, 139);
		G.setcolor (Color.Black); 3. Constructs the two-dimensional code picture if (D.length > 0 && d.length < 123) {boolean[][] b = Qrcode.calqrcode (d);  for (int i = 0; i < b.length. i++) {for (int j = 0; J < B.length; J +) {if (b[j][i)) {G.fillrect (j
					* 3 + 2, I * 3 + 2, 3, 3);
		}}} g.dispose ();
		Image.flush ();
	return image;
		The public static void encode (String str, File f) throws Exception {//1. Create QRCode qrcode qrcode = new QRCode ();
		Qrcode.setqrcodeerrorcorrect (' M ');
		Qrcode.setqrcodeencodemode (' B ');
		Qrcode.setqrcodeversion (7);
		2. Number with UTF-8 encoded byte[] D = str.getbytes ("UTF-8");
		BufferedImage image = New BufferedImage (139, 139, BUFFEREDIMAGE.TYPE_INT_RGB);
		Graphics2D g = image.creategraphics ();
		G.setbackground (Color.White);
		G.clearrect (0, 0, 139, 139);
		G.setcolor (Color.Black);
			3. Constructs the two-dimensional code picture if (D.length > 0 && d.length < 123) {boolean[][] b = Qrcode.calqrcode (d);//Compute two-bit Boolean array  for (int i = 0; i < b.length. i++) {for (int j = 0; J < B.length; J +) {if (b[j][i)) {G.fillrect (j * 3 + 2, I * 3 + 2, 3, 3); Based on a Boolean arrayFull picture of each point}}} g.dispose ();
		Image.flush ();
	Imageio.write (Image, "PNG", f); public static void Encode (String str, outputstream out) throws Exception {//1. Create QRCode qrcode qrcode = new Qrco
		De ();
		Qrcode.setqrcodeerrorcorrect (' M ');
		Qrcode.setqrcodeencodemode (' B ');
		Qrcode.setqrcodeversion (7);
		2. Number with UTF-8 encoded byte[] D = str.getbytes ("UTF-8");
		BufferedImage image = New BufferedImage (139, 139, BUFFEREDIMAGE.TYPE_INT_RGB);
		Graphics2D g = image.creategraphics ();
		G.setbackground (Color.White);
		G.clearrect (0, 0, 139, 139);
		G.setcolor (Color.Black);
			3. Constructs the two-dimensional code picture if (D.length > 0 && d.length < 123) {boolean[][] b = Qrcode.calqrcode (d);  for (int i = 0; i < b.length. i++) {for (int j = 0; J < B.length; J +) {if (b[j][i)) {G.fillrect (j
					* 3 + 2, I * 3 + 2, 3, 3);
		}}} g.dispose ();
		Image.flush ();
	Imageio.write (Image, "PNG", out); public static String decode (File f) throws Exception {Qrcodedecoder decoder = new Qrcodedecoder ();
		BufferedImage image = null; Image = Imageio.read (f);
		Get bufferedimage string decodeddata = new String (Decoder.decode (image),//decode, and generate string "UTF-8");
	return decodeddata;
		public static String decode (InputStream in) throws Exception {Qrcodedecoder decoder = new Qrcodedecoder ();
		BufferedImage image = null;
		Image = Imageio.read (in);
		String decodeddata = new String (Decoder.decode (new myimage (image), "UTF-8");
	return decodeddata;

	} class MyImage implements Qrcodeimage {bufferedimage image;
	Public MyImage (bufferedimage image) {this.image = image;
	public int getwidth () {return image.getwidth ();
	public int getheight () {return image.getheight ();
	public int GetPixel (int x, int y) {return Image.getrgb (x, y); }

}

Test class:

Package test;

Import Java.io.File;

Import Org.xiazdong.QRCodeUtils;

public class Test {public

	static void Main (string[] args) throws Exception {
		Qrcodeutils.encode ("Xiazdong", New F Ile ("1.png"));
		String str = qrcodeutils.decode (new File ("1.png"));
		System.out.println (str);
	}

Reference articles:

(1) http://blog.csdn.net/wangpeng047/article/details/7181217

(2) http://zjgzpc.iteye.com/blog/1478106