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java生成带logo的二维码

news 来源：原创 2024/5/6 4:07:59

随着微信在市场上的占有率不对升高，二维码开始逐渐进入人们的视野，扫码支付，扫码关注，扫码打开连接...

究竟二维码是个什么东西我就不在这里赘述了，关于这方面大家可以去上搜索引擎

我在这里就简单介绍一下一个Java的生成二维码工具，是Google提供的

上代码,

  1 package com.xxxx.xx;
  2 
  3 import java.awt.Color;
  4 import java.awt.Font;
  5 import java.awt.Graphics2D;
  6 import java.awt.image.BufferedImage;
  7 import java.io.File;
  8 import java.util.HashMap;
  9 import java.util.Map;
 10 import java.util.Objects;
 11 
 12 import javax.imageio.ImageIO;
 13 
 14 import org.apache.commons.lang3.StringUtils;
 15 
 16 import com.google.zxing.BarcodeFormat;
 17 import com.google.zxing.EncodeHintType;
 18 import com.google.zxing.MultiFormatWriter;
 19 import com.google.zxing.WriterException;
 20 import com.google.zxing.common.BitMatrix;
 21 import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
 22 
 23 /**
 24  * 画制定logo和制定描述的二维码
 25  * 
 26  * @author songyz
 27  *
 28  */
 29 public class ZXingCode {
 30     private static final int QRCOLOR = 0xFF000000; // 默认是黑色
 31     private static final int BGWHITE = 0xFFFFFFFF; // 背景颜色
 32 
 33     private static final int WIDTH = 400; // 二维码宽
 34     private static final int HEIGHT = 400; // 二维码高
 35 
 36     // 用于设置QR二维码参数
 37     private static Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>() {
 38         private static final long serialVersionUID = 1L;
 39         {
 40             put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);// 设置QR二维码的纠错级别（H为最高级别）具体级别信息
 41             put(EncodeHintType.CHARACTER_SET, "utf-8");// 设置编码方式
 42             put(EncodeHintType.MARGIN, 0);
 43         }
 44     };
 45 
 46     public static void main(String[] args) throws WriterException {
 47         File logoFile = new File("D://QrCode/logo3.png");
 48         File QrCodeFile = new File("D://QrCode/05.png");
 49         String url = "https://www.baidu.com/";
 50         String note = "访问百度连接";
 51         drawLogoQRCode(logoFile, QrCodeFile, url, note);
 52     }
 53 
 54     // 生成带logo的二维码图片
 55     public static void drawLogoQRCode(File logoFile, File codeFile, String qrUrl, String note) {
 56         try {
 57             MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
 58             // 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
 59             BitMatrix bm = multiFormatWriter.encode(qrUrl, BarcodeFormat.QR_CODE, WIDTH, HEIGHT, hints);
 60             BufferedImage image = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB);
 61 
 62             // 开始利用二维码数据创建Bitmap图片，分别设为黑（0xFFFFFFFF）白（0xFF000000）两色
 63             for (int x = 0; x < WIDTH; x++) {
 64                 for (int y = 0; y < HEIGHT; y++) {
 65                     image.setRGB(x, y, bm.get(x, y) ? QRCOLOR : BGWHITE);
 66                 }
 67             }
 68 
 69             int width = image.getWidth();
 70             int height = image.getHeight();
 71             if (Objects.nonNull(logoFile) && logoFile.exists()) {
 72                 // 构建绘图对象
 73                 Graphics2D g = image.createGraphics();
 74                 // 读取Logo图片
 75                 BufferedImage logo = ImageIO.read(logoFile);
 76                 // 开始绘制logo图片
 77                 g.drawImage(logo, width * 2 / 5, height * 2 / 5, width * 2 / 10, height * 2 / 10, null);
 78                 g.dispose();
 79                 logo.flush();
 80             }
 81 
 82             // 自定义文本描述
 83             if (StringUtils.isNotEmpty(note)) {
 84                 // 新的图片，把带logo的二维码下面加上文字
 85                 BufferedImage outImage = new BufferedImage(400, 445, BufferedImage.TYPE_4BYTE_ABGR);
 86                 Graphics2D outg = outImage.createGraphics();
 87                 // 画二维码到新的面板
 88                 outg.drawImage(image, 0, 0, image.getWidth(), image.getHeight(), null);
 89                 // 画文字到新的面板
 90                 outg.setColor(Color.BLACK);
 91                 outg.setFont(new Font("楷体", Font.BOLD, 30)); // 字体、字型、字号
 92                 int strWidth = outg.getFontMetrics().stringWidth(note);
 93                 if (strWidth > 399) {
 94                     // //长度过长就截取前面部分
 95                     // 长度过长就换行
 96                     String note1 = note.substring(0, note.length() / 2);
 97                     String note2 = note.substring(note.length() / 2, note.length());
 98                     int strWidth1 = outg.getFontMetrics().stringWidth(note1);
 99                     int strWidth2 = outg.getFontMetrics().stringWidth(note2);
100                     outg.drawString(note1, 200 - strWidth1 / 2, height + (outImage.getHeight() - height) / 2 + 12);
101                     BufferedImage outImage2 = new BufferedImage(400, 485, BufferedImage.TYPE_4BYTE_ABGR);
102                     Graphics2D outg2 = outImage2.createGraphics();
103                     outg2.drawImage(outImage, 0, 0, outImage.getWidth(), outImage.getHeight(), null);
104                     outg2.setColor(Color.BLACK);
105                     outg2.setFont(new Font("宋体", Font.BOLD, 30)); // 字体、字型、字号
106                     outg2.drawString(note2, 200 - strWidth2 / 2,outImage.getHeight() + (outImage2.getHeight() - outImage.getHeight()) / 2 + 5);
107                     outg2.dispose();
108                     outImage2.flush();
109                     outImage = outImage2;
110                 } else {
111                     outg.drawString(note, 200 - strWidth / 2, height + (outImage.getHeight() - height) / 2 + 12); // 画文字
112                 }
113                 outg.dispose();
114                 outImage.flush();
115                 image = outImage;
116             }
117 
118             image.flush();
119 
120             ImageIO.write(image, "png", codeFile); // TODO
121         } catch (Exception e) {
122             e.printStackTrace();
123         }
124     }
125 
126 }