Java generates QR codes to add logo and text functions
- 2020-06-07 04:33:16
- OfStack
Without further ado, I posted the code directly to you. The specific code is as follows:
package com.luo.wctweb.util;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletRequest;
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;
import com.lz.lsf.util.Base64;
/** * @Description: (2 D code ) * @author : luoguohui * @date : 2015-10-29 In the afternoon 05:27:13 */
public class ZXingCode {
private static final int QRCOLOR = 0xFF000000; // Default is black
private static final int BGWHITE = 0xFFFFFFFF; // The background color
public static void main(String[] args) throws WriterException
{
try
{
getLogoQRCode("https://www.baidu.com/", null, " Jump to Baidu 2 D code ");
}
catch (Exception e)
{
e.printStackTrace();
}
}
/** * Generated with logo the 2 D code pictures * * @param qrPic * @param logoPic */
public static String getLogoQRCode(String qrUrl,HttpServletRequest request,String productName)
{
// String filePath = request.getSession().getServletContext().getRealPath("/") + "resources/images/logoImages/llhlogo.png";
//filePath is 2 D code logo But in practice we put the path under one of the project paths, so the path USES the one above, just comment out the following
String filePath = "C:/Users/luoguohui/Desktop/78310a55b319ebc4fa3aef658126cffc1f17168f.jpg"; //TODO
String content = qrUrl;
try
{
ZXingCode zp = new ZXingCode();
BufferedImage bim = zp.getQR_CODEBufferedImage(content, BarcodeFormat.QR_CODE, 400, 400, zp.getDecodeHintType());
return zp.addLogo_QRCode(bim, new File(filePath), new LogoConfig(), productName);
}
catch (Exception e)
{
e.printStackTrace();
}
return null;
}
/** * to 2 Dimension code image addition Logo * * @param qrPic * @param logoPic */
public String addLogo_QRCode(BufferedImage bim, File logoPic, LogoConfig logoConfig, String productName)
{
try
{
/** * read 2 Dimension code images and build drawing objects */
BufferedImage image = bim;
Graphics2D g = image.createGraphics();
/** * read Logo The picture */
BufferedImage logo = ImageIO.read(logoPic);
/** * Set up the logo The size of the , I set as 2 Dimension code picture 20%, Because it's too big to cover up 2 D code */
int widthLogo = logo.getWidth(null)>image.getWidth()*3/10?(image.getWidth()*3/10):logo.getWidth(null),
heightLogo = logo.getHeight(null)>image.getHeight()*3/10?(image.getHeight()*3/10):logo.getWidth(null);
/** * logo In the center */
int x = (image.getWidth() - widthLogo) / 2;
int y = (image.getHeight() - heightLogo) / 2;
/** * logo In the bottom right hand corner * int x = (image.getWidth() - widthLogo); * int y = (image.getHeight() - heightLogo); */
// Start drawing pictures
g.drawImage(logo, x, y, widthLogo, heightLogo, null);
// g.drawRoundRect(x, y, widthLogo, heightLogo, 15, 15);
// g.setStroke(new BasicStroke(logoConfig.getBorder()));
// g.setColor(logoConfig.getBorderColor());
// g.drawRect(x, y, widthLogo, heightLogo);
g.dispose();
// Add the name of the item. The name of the item should not be too long. If it's too long, it will automatically intercept it
if (productName != null && !productName.equals("")) {
// New picture, bring it logo the 2 The dimension code is followed by text
BufferedImage outImage = new BufferedImage(400, 445, BufferedImage.TYPE_4BYTE_ABGR);
Graphics2D outg = outImage.createGraphics();
// draw 2 Dimension code to new panel
outg.drawImage(image, 0, 0, image.getWidth(), image.getHeight(), null);
// Draw text to the new panel
outg.setColor(Color.BLACK);
outg.setFont(new Font(" Song typeface ",Font.BOLD,30)); // Font, type, font size
int strWidth = outg.getFontMetrics().stringWidth(productName);
if (strWidth > 399) {
// // If it's too long, cut out the front
// outg.drawString(productName, 0, image.getHeight() + (outImage.getHeight() - image.getHeight())/2 + 5 ); // Draw the text
// Wrap lines if they are too long
String productName1 = productName.substring(0, productName.length()/2);
String productName2 = productName.substring(productName.length()/2, productName.length());
int strWidth1 = outg.getFontMetrics().stringWidth(productName1);
int strWidth2 = outg.getFontMetrics().stringWidth(productName2);
outg.drawString(productName1, 200 - strWidth1/2, image.getHeight() + (outImage.getHeight() - image.getHeight())/2 + 12 );
BufferedImage outImage2 = new BufferedImage(400, 485, BufferedImage.TYPE_4BYTE_ABGR);
Graphics2D outg2 = outImage2.createGraphics();
outg2.drawImage(outImage, 0, 0, outImage.getWidth(), outImage.getHeight(), null);
outg2.setColor(Color.BLACK);
outg2.setFont(new Font(" Song typeface ",Font.BOLD,30)); // Font, type, font size
outg2.drawString(productName2, 200 - strWidth2/2, outImage.getHeight() + (outImage2.getHeight() - outImage.getHeight())/2 + 5 );
outg2.dispose();
outImage2.flush();
outImage = outImage2;
}else {
outg.drawString(productName, 200 - strWidth/2 , image.getHeight() + (outImage.getHeight() - image.getHeight())/2 + 12 ); // Draw the text
}
outg.dispose();
outImage.flush();
image = outImage;
}
logo.flush();
image.flush();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
baos.flush();
ImageIO.write(image, "png", baos);
//2 The path generated by the dimension code, but in the actual project, we generated this 2 Dimension code is displayed on the interface, so the following line breaks can be commented out
// And you can see that this method ends up returning this 2 D yards imageBase64 string
// Front end with <img src="data:image/png;base64,${imageBase64QRCode}"/> Among them ${imageBase64QRCode} The corresponding 2 D yards imageBase64 string
ImageIO.write(image, "png", new File("C:/Users/luoguohui/Desktop/TDC-" + new Date().getTime() + "test.png")); //TODO
String imageBase64QRCode = Base64.byteArrayToBase64(baos.toByteArray());
baos.close();
return imageBase64QRCode;
}
catch (Exception e)
{
e.printStackTrace();
}
return null;
}
/** * Build initialization 2 D code * * @param bm * @return */
public BufferedImage fileToBufferedImage(BitMatrix bm)
{
BufferedImage image = null;
try
{
int w = bm.getWidth(), h = bm.getHeight();
image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
for (int x = 0; x < w; x++)
{
for (int y = 0; y < h; y++)
{
image.setRGB(x, y, bm.get(x, y) ? 0xFF000000 : 0xFFCCDDEE);
}
}
}
catch (Exception e)
{
e.printStackTrace();
}
return image;
}
/** * generate 2 D code bufferedImage The picture * * @param content * The coding content * @param barcodeFormat * The encoding type * @param width * Image width * @param height * Picture height * @param hints * Set the parameters * @return */
public BufferedImage getQR_CODEBufferedImage(String content, BarcodeFormat barcodeFormat, int width, int height, Map<EncodeHintType, ?> hints)
{
MultiFormatWriter multiFormatWriter = null;
BitMatrix bm = null;
BufferedImage image = null;
try
{
multiFormatWriter = new MultiFormatWriter();
// The sequence of parameters is as follows: encoding content, encoding type, width of image generated, height of image generated, and setting parameters
bm = multiFormatWriter.encode(content, barcodeFormat, width, height, hints);
int w = bm.getWidth();
int h = bm.getHeight();
image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
// Begin to use 2 Dimension code data creation Bitmap Pictures, respectively set to black ( 0xFFFFFFFF White () 0xFF000000 Two color)
for (int x = 0; x < w; x++)
{
for (int y = 0; y < h; y++)
{
image.setRGB(x, y, bm.get(x, y) ? QRCOLOR : BGWHITE);
}
}
}
catch (WriterException e)
{
e.printStackTrace();
}
return image;
}
/** * Set up the 2 Format parameters for dimension codes * * @return */
public Map<EncodeHintType, Object> getDecodeHintType()
{
// Used to set the QR2 D code parameter
Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();
// Set up the QR2 Error correction level of dimension code ( H Is the highest level) specific level of information
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
// Set encoding mode
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
hints.put(EncodeHintType.MARGIN, 0);
hints.put(EncodeHintType.MAX_SIZE, 350);
hints.put(EncodeHintType.MIN_SIZE, 100);
return hints;
}
}
class LogoConfig
{
// logo Default border color
public static final Color DEFAULT_BORDERCOLOR = Color.WHITE;
// logo Default border width
public static final int DEFAULT_BORDER = 2;
// logo The default size is for photos 1/5
public static final int DEFAULT_LOGOPART = 5;
private final int border = DEFAULT_BORDER;
private final Color borderColor;
private final int logoPart;
/** * Creates a default config with on color {@link #BLACK} and off color * {@link #WHITE}, generating normal black-on-white barcodes. */
public LogoConfig()
{
this(DEFAULT_BORDERCOLOR, DEFAULT_LOGOPART);
}
public LogoConfig(Color borderColor, int logoPart)
{
this.borderColor = borderColor;
this.logoPart = logoPart;
}
public Color getBorderColor()
{
return borderColor;
}
public int getBorder()
{
return border;
}
public int getLogoPart()
{
return logoPart;
}
}