Java generates QR code image codes

First you need to import the Qrcode.jar package

Look at this Http://pan.baidu.com/s/1o6qRFqM.

Import Java.awt.Color;
Import Java.awt.Graphics2D;
Import Java.awt.Image;
Import Java.awt.image.BufferedImage;
Import Java.io.File;
Import java.io.IOException;
Import java.io.UnsupportedEncodingException;
Import Javax.imageio.ImageIO;
Import Com.swetake.util.Qrcode;

public class Qrcodeutil {
public static void Main (string[] args) {

Generate two-dimensional code
String content = "http://user.qzone.qq.com/913240046";
String Imgpath = "F:\\test.png";
String ccpath= "F:\\center.png";
Createqrcode (content, Imgpath,ccpath);

String Content2 = "http://user.qzone.qq.com/913240046";
String imgPath2 = "F:\\test2.png";
Qrcodeimg (CONTENT2,IMGPATH2);

}

/**
* @param content
* @param imgpath to generate the address of the image of the QR code
* @param ccbpath Two-dimensional code middle picture
* @return
*/
public static int Createqrcode (string content, String Imgpath, String ccbpath) {
try {
QRCode Qrcodehandler = new QRCode ();
Set the two-dimensional code error rate, optional L (7%), M (15%), Q (25%), H (30%), the higher the error rate can be stored less information, but the two-dimensional code clarity requirements of the smaller
Qrcodehandler.setqrcodeerrorcorrect (' Q ');
n represents the number, a means the character a-z,b represents the other character
Qrcodehandler.setqrcodeencodemode (' B ');
Set the two-dimensional code version, the value range of 1-40, the larger the size of the larger, the more information can be stored
int size = 12;
Qrcodehandler.setqrcodeversion (size);
int imgsize = + * (size-1);

byte[] Contentbytes = content.getbytes ("Utf-8");
BufferedImage bufimg = new BufferedImage (imgsize, imgsize, Bufferedimage.type_int_rgb);
graphics2d GS = Bufimg.creategraphics ();

Gs.setbackground (Color.White);
Gs.clearrect (0, 0, imgsize, imgsize);

Set Image Color > BLACK
Gs.setcolor (Color.Black);

Setting offset does not set may cause parsing errors
int pixoff = 2;
Output content > QR code
if (contentbytes.length > 0 && contentbytes.length <800) {
boolean[][] Codeout = Qrcodehandler.calqrcode (contentbytes);
for (int i = 0; i < codeout.length; i++) {
for (int j = 0; J < Codeout.length; J + +) {
if (Codeout[j][i]) {
Gs.fillrect (J * 3 + Pixoff, I * 3 + Pixoff, 3, 3);
}
}
}
} else {
System.err.println ("qrcode content bytes Length ="
+ Contentbytes.length + "not in [0,800].");
return-1;
}
Image img = imageio.read (new File (Ccbpath));//Instantiate an Image object.
Gs.drawimage (IMG,,, or null);//Set the location of the middle picture of the QR code

Gs.dispose ();
Bufimg.flush ();

Generate two-dimensional code QRCode pictures
File Imgfile = new file (Imgpath);
Imageio.write (bufimg, "PNG", imgfile);

} catch (Exception e)
{
E.printstacktrace ();
return-100;
}
return 0;
}

/**
* @param content QR code included
* @param imgpath Two-dimensional code generation and save Road strength
*/
public static void Qrcodeimg (String content,string imgpath) {
try {

QRCode QRCode = new QRCode ();
Qrcode.setqrcodeerrorcorrect (' M ');
Qrcode.setqrcodeencodemode (' B ');
Qrcode.setqrcodeversion (7);

int width = 140;
int height = 140;

BufferedImage bufimg = new BufferedImage (WIDTH,HEIGHT,BUFFEREDIMAGE.TYPE_INT_RGB);
graphics2d GS = Bufimg.creategraphics ();
Gs.setbackground (Color.White);
Gs.clearrect (0, 0, width, height);
Gs.setcolor (Color.Black);


byte[] Contentbytes = content.getbytes ("Utf-8");
int pixoff = 2;

Length limit
if (contentbytes.length>0 && contentbytes.length<120) {
boolean[][] Codeout = Qrcode.calqrcode (contentbytes);
for (int i = 0;i<codeout.length;i++) {
for (int j = 0;j<codeout.length;j++) {
if (Codeout[j][i]) {
Gs.fillrect (j*3 + pixoff, i*3 +pixoff, 3, 3);
}
}
}
}else{
SYSTEM.OUT.PRINTLN ("error");
}
Gs.dispose ();
Bufimg.flush ();

File Imgfile = new file (Imgpath);
try {
Imageio.write (bufimg, "PNG", imgfile);
} catch (IOException e) {
E.printstacktrace ();
}
} catch (Unsupportedencodingexception e) {
E.printstacktrace ();
}
}

}

Generated two-dimensional code picture

Java generates QR code image codes