Java code generates QR code images and java code

Java code generates QR code images and java code

Jar package to be used: QRCode. jar

Click here to download QRCode. jar.

Because the code is relatively simple. I don't have to worry about it. I simply post the code and copy it to use it directly.

TwoDimensionCode.java:

1 import java. awt. color; 2 import java. awt. graphics2D; 3 import java. awt. image. bufferedImage; 4 import java. io. file; 5 import java. io. IOException; 6 import java. io. inputStream; 7 import java. io. outputStream; 8 9 import javax. imageio. imageIO; 10 11 import jp. sourceforge. qrcode. QRCodeDecoder; 12 import jp. sourceforge. qrcode. exception. decodingFailedException; 13 14 import com. swetake. util. qrcode; 15 1 6 17 public class TwoDimensionCode {18 19/*** 20 * generate a QR code (QRCode) image 21 * @ param content storage content 22 * @ param imgPath image path 23 */24 public void encoderQRCode (String content, String imgPath) {25 this. encoderQRCode (content, imgPath, "png", 7); 26} 27 28/** 29 * generate a QR code (QRCode) image 30 * @ param content storage content 31 * @ param output stream 32 */33 public void encoderQRCode (String content, OutputStream output) {34 t His. encoderQRCode (content, output, "png", 7); 35} 36 37/** 38 * generate a QR code (QRCode) image 39 * @ param content storage content 40 * @ param imgPath image path 41 * @ param imgType image type 42 */43 public void encoderQRCode (String content, String imgPath, String imgType) {44 this. encoderQRCode (content, imgPath, imgType, 7); 45} 46 47/** 48 * generate a QR code (QRCode) figure 49 * @ param content storage content 50 * @ param output stream 51 * @ param imgType figure Slice type 52 */53 public void encoderQRCode (String content, OutputStream output, String imgType) {54 this. encoderQRCode (content, output, imgType, 7); 55} 56 57/** 58 * generate a QR code (QRCode) image 59 * @ param content storage content 60 * @ param imgPath image path 61 * @ param imgType Image Type 62 * @ param size QR code size 63 */64 public void encoderQRCode (String content, string imgPath, String imgType, int size) {65 try {66 BufferedImage BufImg = this. qRCodeCommon (content, imgType, size); 67 68 File imgFile = new File (imgPath); 69 // generate a QR code QRCode image 70 ImageIO. write (bufImg, imgType, imgFile); 71} catch (Exception e) {72 e. printStackTrace (); 73} 74} 75 76/** 77 * generate a QR code (QRCode) image 78 * @ param content 79 * @ param output stream 80 * @ param imgType image type 81 * @ param size QR code size 82 */83 public void encoderQRCode (String content, out PutStream output, String imgType, int size) {84 try {85 BufferedImage bufImg = this. qRCodeCommon (content, imgType, size); 86 // generate a QR code QRCode image 87 ImageIO. write (bufImg, imgType, output); 88} catch (Exception e) {89 e. printStackTrace (); 90} 91} 92 93/*** 94 * generate a QR code (QRCode) public image method 95 * @ param content 96 * @ param imgType Image Type 97 * @ param size QR code size 98 * @ return 99 */100 private BufferedImage QRCodeCommon (String content, String imgType, int size) {101 BufferedImage bufImg = null; 102 try {103 Qrcode qrcodeHandler = new Qrcode (); 104 // set the error rate of the QR code, optional L (7%), M (15%), Q (25%), H (30%), the higher the error rate, the less information that can be stored, however, the smaller the requirement for two-dimensional code definition is, the smaller the 105 qrcodeHandler. setQrcodeErrorCorrect ('M'); 106 qrcodeHandler. setQrcodeEncodeMode ('B'); 107 // set the two-dimensional code size. The value range is 1-40. The larger the value is, the larger the size is. The greater the information that can be stored, the greater the 108 qrcodeHandler. setQrcodeVersion (size); 109 // byte array of the obtained content, Set the encoding format to 110 byte [] contentBytes = content. getBytes ("UTF-8"); 111 // image size 112 int imgSize = 67 + 12 * (size-1); 113 bufImg = new BufferedImage (imgSize, imgSize, BufferedImage. TYPE_INT_RGB); 114 Graphics2D gs = bufImg. createGraphics (); 115 // set the background color to 116 gs. setBackground (Color. WHITE); 117 gs. clearRect (0, 0, imgSize, imgSize); 118 119 // sets the image color> BLACK120 gs. setColor (Color. BLACK); 121 // set the offset. If this parameter is not set, the parsing may fail. 12 2 int pixoff = 2; 123 // output content> QR code 124 if (contentBytes. length> 0 & contentBytes. length <800) {125 boolean [] [] codeOut = qrcodeHandler. calQrcode (contentBytes); 126 for (int I = 0; I <codeOut. length; I ++) {127 for (int j = 0; j <codeOut. length; j ++) {128 if (codeOut [j] [I]) {129 gs. fillRect (j * 3 + pixoff, I * 3 + pixoff, 3, 3); 130} 131} 132} else {133 throw new Exception ("QRCode conte Nt bytes length = "+ contentBytes. length + "not in [0,800]. "); 135} 136 gs. dispose (); 137 bufImg. flush (); 138} catch (Exception e) {139 e. printStackTrace (); 140} 141 return bufImg; 142} 143 144/** 145 * parse QR code (QRCode) 146 * @ param imgPath image path 147 * @ return148 */149 public String decoderQRCode (String imgPath) {150 // QRCode QR code image File 151 File imageFile = new File (imgPath ); 152 BufferedImage bufImg = nul L; 153 String content = null; 154 try {155 bufImg = ImageIO. read (imageFile); 156 QRCodeDecoder decoder = new QRCodeDecoder (); 157 content = new String (decoder. decode (newTwoDimensionCodeImage (bufImg), "UTF-8"); 158} catch (IOException e) {159 System. out. println ("Error:" + e. getMessage (); 160 e. printStackTrace (); 161} catch (DecodingFailedException dfe) {162 System. out. println ("Error:" + dfe. g EtMessage (); 163 dfe. printStackTrace (); 164} 165 return content; 166} 167 168/** 169 * parse QR code (QRCode) 170 * @ param input stream 171 * @ return172 */173 public String decoderQRCode (InputStream input) {174 BufferedImage bufImg = null; 175 String content = null; 176 try {177 bufImg = ImageIO. read (output); 178 QRCodeDecoder decoder = new QRCodeDecoder (); 179 content = new String (decoder. decode (newTwoDimensionCode Image (bufImg), "UTF-8"); 180} catch (IOException e) {181 System. out. println ("Error:" + e. getMessage (); 182 e. printStackTrace (); 183} catch (DecodingFailedException dfe) {184 System. out. println ("Error:" + dfe. getMessage (); 185 dfe. printStackTrace (); 186} 187 return content; 188} 189 190 public static void main (String [] args) {191 String imgPath = "G:/ZTFCard.png "; 192 String encoderContent =" My business card "+" \ n my weibo: [http://t.qq.com/fengqingyan] "+" \ n Email: [zhitianfeng@hotmail.com] "+" \ n mobile phone: [15601973133] "; 193 TwoDimensionCode handler = new TwoDimensionCode (); 194 handler. encoderQRCode (encoderContent, imgPath, "png"); 195 // try {196 // OutputStream output = new FileOutputStream (imgPath); 197 // handler. encoderQRCode (content, output); 198 //} catch (Exception e) {199 // e. printStackTrace (); 200 // {} 201 System. out. println ("======== encoder success"); 202 203 204 String decoderContent = handler. decoderQRCode (imgPath); 205 System. out. println ("Resolution Result:"); 206 System. out. println (decoderContent); 207 System. out. println ("========= decoder success !!! "); 208} 209}

The second java file: TwoDimensionCodeImage. java

 1 import java.awt.image.BufferedImage; 2  3 import jp.sourceforge.qrcode.data.QRCodeImage; 4  5 public class TwoDimensionCodeImage implements QRCodeImage { 6  7     BufferedImage bufImg; 8      9     public TwoDimensionCodeImage(BufferedImage bufImg) {10         this.bufImg = bufImg;11     }12     13     public int getHeight() {14         return bufImg.getHeight();15     }16 17     public int getPixel(int x, int y) {18         return bufImg.getRGB(x, y);19     }20 21     public int getWidth() {22         return bufImg.getWidth();23     }24 25 }

 

 

The following is a test class: QRtest. java

public class QRtest {    public static void main(String[] args){        TwoDimensionCode td = new TwoDimensionCode();        td.encoderQRCode("this is a test","d://123.jpg","jpg",12);    }}

Additional code: Click to download the code

END!

The following sample image is provided:

 

I 'd like to say that.

I suddenly thought that I could use this method to confess something and generate an I love you! Scan the QR code for the girl you like. Haha

Who has the source code (java version) generated by the QR code?

Import java. io .*;
Import java. util. Date;

Import java. awt .*;
Import java. awt. image .*;
Import javax. imageio .*;

Public class QRCodeEncoderTest
{

/** Creates a new instance of QRCodeEncoderTest */
Public QRCodeEncoderTest ()
{
}

Public static void create_image (String sms_info) throws Exception {
Try {
Qrcode testQrcode = new qrcode ();
TestQrcode. setQrcodeErrorCorrect ('M ');
TestQrcode. setQrcodeEncodeMode ('B ');
TestQrcode. setQrcodeVersion (7 );
String testString = sms_info;
Byte [] d = testString. getBytes ("gbk ");
System. out. println (d. length );
// BufferedImage bi = new BufferedImage (98, 98, BufferedImage. TYPE_INT_RGB );
BufferedImage bi = new BufferedImage (98, 98, BufferedImage. TYPE_BYTE_BINARY );
Graphics2D g = bi. createGraphics ();
G. setBackground (Color. WHITE );
G. clearRect (0, 0, 98, 98 );
G. setColor (Color. BLACK );

// Limit the maximum number of bytes to 120
If (d. length> 0 & d. length <120 ){
Boolean [] [] s = testQrcode. calQrcode (d );
For (int I = 0; I <s. length; I ++ ){
For (int j = 0; j <s. length; j ++ ){
If (s [j] [I]) {
G. fillRect (j * 2 + 3, I * 2 + 3, 2 );
}
}
}
}
G. dispose ();
Bi. flush ();
... The remaining full text>

The urgency QR code generator java finally saves the image to a directory.

I know that the software is sold by calling the camera of the Local Machine, taking a photo, saving it as a QR code, and then you can modify some code and save it as an image in the specified directory,