java生成的二维码中间logo怎么改成文字

Posted 2023-05-01

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: (二维码) * @author：luoguohui * @date：2015-10-29 下午05:27:13 */
public class ZXingCode
private static final int QRCOLOR = 0xFF000000; //默认是黑色
private static final int BGWHITE = 0xFFFFFFFF; //背景颜色

public static void main(String[] args) throws WriterException

try

getLogoQRCode("https://www.baidu.com/", null, "跳转到百度的二维码");

catch (Exception e)

e.printStackTrace();



/** * 生成带logo的二维码图片 * * @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是二维码logo的路径，但是实际中我们是放在项目的某个路径下面的，所以路径用上面的，把下面的注释就好
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;


/** * 给二维码图片添加Logo * * @param qrPic * @param logoPic */
public String addLogo_QRCode(BufferedImage bim, File logoPic, LogoConfig logoConfig, String productName)

try

/** * 读取二维码图片，并构建绘图对象 */
BufferedImage image = bim;
Graphics2D g = image.createGraphics();

/** * 读取Logo图片 */
BufferedImage logo = ImageIO.read(logoPic);
/** * 设置logo的大小,本人设置为二维码图片的20%,因为过大会盖掉二维码 */
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放在中心 */
int x = (image.getWidth() - widthLogo) / 2;
int y = (image.getHeight() - heightLogo) / 2;
/** * logo放在右下角 * int x = (image.getWidth() - widthLogo); * int y = (image.getHeight() - heightLogo); */

//开始绘制图片
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();

//把商品名称添加上去，商品名称不要太长哦，这里最多支持两行。太长就会自动截取啦
if (productName != null && !productName.equals(""))
//新的图片，把带logo的二维码下面加上文字
BufferedImage outImage = new BufferedImage(400, 445, BufferedImage.TYPE_4BYTE_ABGR);
Graphics2D outg = outImage.createGraphics();
//画二维码到新的面板
outg.drawImage(image, 0, 0, image.getWidth(), image.getHeight(), null);
//画文字到新的面板
outg.setColor(Color.BLACK);
outg.setFont(new Font("宋体",Font.BOLD,30)); //字体、字型、字号
int strWidth = outg.getFontMetrics().stringWidth(productName);
if (strWidth > 399)
// //长度过长就截取前面部分
// outg.drawString(productName, 0, image.getHeight() + (outImage.getHeight() - image.getHeight())/2 + 5 ); //画文字
//长度过长就换行
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("宋体",Font.BOLD,30)); //字体、字型、字号
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 ); //画文字

outg.dispose();
outImage.flush();
image = outImage;

logo.flush();
image.flush();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
baos.flush();
ImageIO.write(image, "png", baos);

//二维码生成的路径，但是实际项目中，我们是把这生成的二维码显示到界面上的，因此下面的折行代码可以注释掉
//可以看到这个方法最终返回的是这个二维码的imageBase64字符串
//前端用 <img src="data:image/png;base64,$imageBase64QRCode"/> 其中$imageBase64QRCode对应二维码的imageBase64字符串
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;


/** * 构建初始化二维码 * * @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;


/** * 生成二维码bufferedImage图片 * * @param content * 编码内容 * @param barcodeFormat * 编码类型 * @param width * 图片宽度 * @param height * 图片高度 * @param hints * 设置参数 * @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();
// 参数顺序分别为：编码内容，编码类型，生成图片宽度，生成图片高度，设置参数
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);

// 开始利用二维码数据创建Bitmap图片，分别设为黑（0xFFFFFFFF）白（0xFF000000）两色
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;


/** * 设置二维码的格式参数 * * @return */
public Map<EncodeHintType, Object> getDecodeHintType()

// 用于设置QR二维码参数
Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();
// 设置QR二维码的纠错级别（H为最高级别）具体级别信息
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
// 设置编码方式
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默认边框颜色
public static final Color DEFAULT_BORDERCOLOR = Color.WHITE;
// logo默认边框宽度
public static final int DEFAULT_BORDER = 2;
// logo大小默认为照片的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;

参考技术A 做个图片上面写文字替换不就好了？ 参考技术B 图片换了就OK 了 参考技术C 图片换成文字图片

java 通过Qrcode生成二维码添加图片logo和文字描述

/**
 *  二维码创建
 * @author yhzm
 *
 */
public class printServiceImpl extends BaseService {
     public void barCodeGenera() {
             init(false);
             //先创建一个二维码
             String text = strRequiredParam("barcode","二维码信息");
             String desc = strRequiredParam("desc","文字内容");//二维码下面的文字描述 
             String logoPath = "d:\aa.png";//二维码的logo地址
            int logoWidth = 40; //logo的宽
            int logoHeight = 40;  //logo的高
            try{
                 Qrcode qrcode = new Qrcode();
                 qrcode.setQrcodeErrorCorrect(‘M‘);//设置纠错等级(分为:L、M、H三个等级)
                 qrcode.setQrcodeEncodeMode(‘B‘);//N代表数字、A代表a-Z、B代表其他字符
                 qrcode.setQrcodeVersion(7);//设置版本
                 
                 int width = 67+12*(7-1);//设置二维码的宽  二维码像素的大小和版本号有关  但是版本号越大   二维码也越是复杂  这个需要注意
                 int height = 67+12*(7-1);//设置二维码的高
                 //将内容变为特定UTF-8格式编码的字节码
                 byte [] qrData = text.getBytes("UTF-8");
                 
                 BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_BGR);
                 //创造画笔
                 Graphics2D gs = bufferedImage.createGraphics();
                 gs.setBackground(Color.WHITE);//设置背景
                 gs.setColor(Color.BLACK);//设置画笔颜色
                 gs.clearRect(0, 0, width, height);//清除画板内容
                 //设置偏移量
                 int pixoff = 2;
                 boolean [][] d = qrcode.calQrcode(qrData);
                 for(int y=0;y<d.length;y++) {
                     for(int x=0;x<d.length;x++) {
                         if(d[x][y]) {
                             gs.fillRect(x*3+pixoff, y*3+pixoff, 3, 3);
                         }
                     }
                 }
                 gs.dispose();
                BufferedImage bm = bufferedImage;//二维码  
                File logoFile = new File(logoPath); //logo图片   
                BufferedImage logoImg = ImageIO.read(logoFile);  
                /* float ratio = 0.5;   //倒圆角
                 if(ratio>0){  
                     logoWidth = logoWidth>width*ratio ? (int)(width*ratio) : logoWidth;  
                     logoHeight = logoHeight>height*ratio ? (int)(height*ratio) : logoHeight;  
                 }  */
                int x = (width-logoWidth)/2;  
                int y = (height-logoHeight)/2;  
                Graphics g = bm.getGraphics();  
                g.drawImage(logoImg, x, y, logoWidth, logoHeight, null);  
                int whiteWidth = 0;  //白边
                Font font = new Font("黑体", Font.BOLD, 12);  
                int fontHeight = g.getFontMetrics(font).getHeight();//得到字体的高度  
                //计算需要多少行  
                int lineNum = 1;  
                int currentLineLen = 0;  
                for(int i=0;i<desc.length();i++){  
                    char c = desc.charAt(i);  
                    int charWidth = g.getFontMetrics(font).charWidth(c); 
                    //循环文字得到文字区域的行数
                    if(currentLineLen+charWidth>width){  
                        lineNum++;  
                        currentLineLen = 0;  
                        continue;  
                    }  
                    currentLineLen += charWidth;  
                }  
                int totalFontHeight = fontHeight*lineNum; //得到文字区域的高度 
                int wordTopMargin = 4;  
                BufferedImage bm1 = new BufferedImage(width, height+totalFontHeight+wordTopMargin-whiteWidth, BufferedImage.TYPE_INT_RGB); //创建将文字高度计算到其中的图片 
                Graphics g1 = bm1.getGraphics();   
                g1.setColor(Color.WHITE);  
                g1.fillRect(0, height, width, totalFontHeight+wordTopMargin-whiteWidth); //将文字部分的背景填充成白色 
                g1.setColor(Color.black);  
                g1.setFont(font);  
                g1.drawImage(bm, 0, 0, null); //将创建好的二维码从起点（0,0）开始画在图中 
                int currentLineIndex = 0;  
                //判断是否只有一行，只有一行就居中显示
                currentLineLen = lineNum-1==currentLineIndex?(width-g.getFontMetrics(font).stringWidth(desc))/2:0;
                int baseLo = g1.getFontMetrics().getAscent();  
                for(int i=0;i<desc.length();i++){  
                    String c = desc.substring(i, i+1);  
                    int charWidth = g.getFontMetrics(font).stringWidth(c); 
                    //判断是否需要换行
                    if(currentLineLen+charWidth>width){  
                        currentLineIndex++;  
                        //判断是否是最后一行  最后一行居中显示
                        currentLineLen = lineNum-1==currentLineIndex?(width-g.getFontMetrics(font).stringWidth(desc.substring(i)))/2:0;
                        g1.drawString(c, currentLineLen + whiteWidth, height+baseLo+fontHeight*(currentLineIndex)+wordTopMargin);//将单个文字画到对应位置 
                        currentLineLen = charWidth;  
                        continue;  
                    }  
                    g1.drawString(c, currentLineLen+whiteWidth, height+baseLo+fontHeight*(currentLineIndex) + wordTopMargin);  
                    currentLineLen += charWidth;  
                } 
                g1.dispose();  
                bm = bm1;
             response.setContentType("image/jpeg");
             //好了 ，现在通过IO流来传送数据
            ImageIO.write(bm , "JPEG", response.getOutputStream());
        }catch(Throwable e){  
            e.printStackTrace();  
        }  
    }
}

这个可以用来生成二维码，并且携带log和文字。