Java生成带图标的二维码

Bertha 。 2022-05-30 10:28 207阅读 0赞

Java生成带图标的二维码，谷歌插件。直接上代码。

pom文件：

<dependency>
                <groupId>com.google.zxing</groupId>
                <artifactId>core</artifactId>
                <version>3.3.0</version>
            </dependency>

package com.github.wxpay.sdk;
    
    import java.awt.Color;
    import java.awt.Font;
    import java.awt.Graphics2D;
    import java.awt.image.BufferedImage;
    import java.io.File;
    import java.util.HashMap;
    import java.util.Map;
    import java.util.Objects;
    
    import javax.imageio.ImageIO;
    
    
    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;
    
    public class zxing {
    
    	 private static final int QRCOLOR = 0xFF000000; // 默认是黑色
    	    private static final int BGWHITE = 0xFFFFFFFF; // 背景颜色
    
    	    private static final int WIDTH = 400; // 二维码宽
    	    private static final int HEIGHT = 400; // 二维码高
    
    	    // 用于设置QR二维码参数
    	    private static HashMap<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>() {
    	        private static final long serialVersionUID = 1L;
    	        {
    	            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
    	            put(EncodeHintType.CHARACTER_SET, "utf-8");// 设置编码方式
    	            put(EncodeHintType.MARGIN, 0);
    	        }
    	    };
    
    	    public static void main(String[] args) throws WriterException {
    	        File logoFile = new File("C://testImg/1.jpg");
    	        File QrCodeFile = new File("C://testImg/05.png");
    	        String url = "https://www.baidu.com/";
    	        String note = "访问百度连接";
    	        drawLogoQRCode(logoFile, QrCodeFile, url, note);
    	    }
    
    	    // 生成带logo的二维码图片
    	    public static void drawLogoQRCode(File logoFile, File codeFile, String qrUrl, String note) {
    	        try {
    	            MultiFormatWriter 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
    	            BitMatrix bm = multiFormatWriter.encode(qrUrl, BarcodeFormat.QR_CODE, WIDTH, HEIGHT, hints);
    	            BufferedImage image = new BufferedImage(WIDTH, HEIGHT, 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 < WIDTH; x++) {
    	                for (int y = 0; y < HEIGHT; y++) {
    	                    image.setRGB(x, y, bm.get(x, y) ? QRCOLOR : BGWHITE);
    	                }
    	            }
    
    	            int width = image.getWidth();
    	            int height = image.getHeight();
    	            if (Objects.nonNull(logoFile) && logoFile.exists()) {
    	                // 构建绘图对象
    	                Graphics2D g = image.createGraphics();
    	                // 读取Logo图片
    	                BufferedImage logo = ImageIO.read(logoFile);
    	                // 开始绘制logo图片
    	                g.drawImage(logo, width * 2 / 5, height * 2 / 5, width * 2 / 10, height * 2 / 10, null);
    	                g.dispose();
    	                logo.flush();
    	            }
    
    	            // 自定义文本描述
    	            if (note!=null) {
    	                // 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("楷体", Font.BOLD, 30)); // 字体、字型、字号
    	                int strWidth = outg.getFontMetrics().stringWidth(note);
    	                if (strWidth > 399) {
    	                    // //长度过长就截取前面部分
    	                    // 长度过长就换行
    	                    String note1 = note.substring(0, note.length() / 2);
    	                    String note2 = note.substring(note.length() / 2, note.length());
    	                    int strWidth1 = outg.getFontMetrics().stringWidth(note1);
    	                    int strWidth2 = outg.getFontMetrics().stringWidth(note2);
    	                    outg.drawString(note1, 200 - strWidth1 / 2, height + (outImage.getHeight() - height) / 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(note2, 200 - strWidth2 / 2,outImage.getHeight() + (outImage2.getHeight() - outImage.getHeight()) / 2 + 5);
    	                    outg2.dispose();
    	                    outImage2.flush();
    	                    outImage = outImage2;
    	                } else {
    	                    outg.drawString(note, 200 - strWidth / 2, height + (outImage.getHeight() - height) / 2 + 12); // 画文字
    	                }
    	                outg.dispose();
    	                outImage.flush();
    	                image = outImage;
    	            }
    
    	            image.flush();
    
    	            ImageIO.write(image, "png", codeFile); // TODO
    	        } catch (Exception e) {
    	            e.printStackTrace();
    	        }
    	    }
    
    }