Java基于Google zxing生成带logo的二维码图片
作者:smileNicky
zxing是一个开放源码的,用java实现的多种格式的1D/2D条码图像处理库,本文主要介绍了Java基于Google zxing生成带logo的二维码图片,具有一定的参考价值,感兴趣的可以了解一下
环境准备
开发环境
- JDK 1.8
- SpringBoot2.2.1
- Maven 3.2+
开发工具
- IntelliJ IDEA
- smartGit
- Navicat15
添加maven配置
<dependency> <groupId>com.google.zxing</groupId> <artifactId>core</artifactId> <version>3.4.0</version> </dependency> <dependency> <groupId>com.google.zxing</groupId> <artifactId>javase</artifactId> <version>3.4.0</version> </dependency>
创建比特矩阵
先创建比特矩阵,设置默认的宽度、高度、后缀名等等
private static final String DEFAULT_CHAR_SET = "UTF-8"; private static final String DEFAULT_FORMAT_NAME = "JPG"; // 二维码宽度 private static final int DEFAULT_QR_CODE_WIDTH = 300; // 二维码高度 private static final int DEFAULT_QR_CODE_HEIGHT = 300; /** * 创建BitMatrix比特矩阵 * @Date 2023/09/24 22:29 * @Param contents 二维码里的内容 * @Param width 二维码宽度 * @param height 二维码高度 * @return com.google.zxing.common.BitMatrix */ public static BitMatrix createBitMatrix(String contents , int width , int height) throws WriterException, IOException { if (ObjectUtil.isNull(width)) { width = DEFAULT_QR_CODE_WIDTH; } if (ObjectUtil.isNull(height)) { height = DEFAULT_QR_CODE_HEIGHT; } Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>(); hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H); // 纠错等级L,M,Q,H hints.put(EncodeHintType.CHARACTER_SET, DEFAULT_CHAR_SET);// 编码utf-8 hints.put(EncodeHintType.MARGIN, 1); // 边距 // 创建比特矩阵 BitMatrix bitMatrix = new MultiFormatWriter().encode(contents, BarcodeFormat.QR_CODE, width, height, hints); return bitMatrix; }
转换为BufferedImage
创建好比特矩阵后,转换为BufferedImage
/** * 转换为BufferedImage * @Date 2023/09/24 22:32 * @Param [bitMatrix] * @return java.awt.image.BufferedImage */ public static BufferedImage toBufferedImage(BitMatrix bitMatrix) throws IOException, WriterException { MatrixToImageConfig matrixToImageConfig = new MatrixToImageConfig(0xFF000001, 0xFFFFFFFF); BufferedImage bufferedImage = MatrixToImageWriter.toBufferedImage(bitMatrix, matrixToImageConfig); return bufferedImage; }
加上二维码logo
给创建的二维码BufferedImage加上logo
/** * 给二维码添加logo * @Date 2023/09/24 22:33 * @Param [bufferedImage, logoFile] * @return java.awt.image.BufferedImage */ public static BufferedImage addQrCodeLogo(BufferedImage bufferedImage, File logoFile) throws IOException { Graphics2D graphics = bufferedImage.createGraphics(); int matrixWidth = bufferedImage.getWidth(); int matrixHeigh = bufferedImage.getHeight(); // 读取logo图片文件 BufferedImage logo = ImageIO.read(logoFile); int logoWidth = logo.getWidth(); int logoHeight = logo.getHeight(); // 计算logo放置位置 int x = bufferedImage.getWidth() / 5*2; int y = bufferedImage.getHeight() / 5*2; int width = matrixWidth / 5; int height = matrixHeigh / 5; // 开始绘制图片 graphics.drawImage(logo, x, y, width, height, null); graphics.drawRoundRect(x, y, logoWidth, logoHeight, 15, 15); graphics.setStroke(new BasicStroke(5.0F, 1, 1)); graphics.setColor(Color.white); graphics.drawRect(x, y, logoWidth, logoHeight); graphics.dispose(); bufferedImage.flush(); return bufferedImage; }
测试
public static void main(String[] args) throws Exception { BufferedImage bufferedImage = toBufferedImage(createBitMatrix("https://blog.csdn.net", 300, 300)); ImageIO.write(bufferedImage, "png", new File("D:/qrcode.jpg")); System.out.println(decodeQrCode(bufferedImage)); BufferedImage logoQrCode = addQrCodeLogo(bufferedImage, new File("D://logo.png")); ImageIO.write(logoQrCode, "png", new File("D:/logoQrcode.jpg")); }
创建不带logo的二维码图片
创建带logo的二维码图片
附录
package com.example.common.util.qrcode; import cn.hutool.core.codec.Base64; import cn.hutool.core.util.ObjectUtil; import cn.hutool.core.util.StrUtil; import com.google.zxing.*; import com.google.zxing.client.j2se.BufferedImageLuminanceSource; import com.google.zxing.client.j2se.MatrixToImageConfig; import com.google.zxing.client.j2se.MatrixToImageWriter; import com.google.zxing.common.BitMatrix; import com.google.zxing.common.HybridBinarizer; import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel; import javax.imageio.ImageIO; import java.awt.*; import java.awt.image.BufferedImage; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.IOException; import java.util.Hashtable; public class QrCodeGenerator { private static final String DEFAULT_CHAR_SET = "UTF-8"; private static final String DEFAULT_FORMAT_NAME = "JPG"; // 二维码宽度 private static final int DEFAULT_QR_CODE_WIDTH = 300; // 二维码高度 private static final int DEFAULT_QR_CODE_HEIGHT = 300; /** * 创建BitMatrix比特矩阵 * @Date 2023/09/24 22:29 * @Param contents 二维码里的内容 * @Param width 二维码宽度 * @param height 二维码高度 * @return com.google.zxing.common.BitMatrix */ public static BitMatrix createBitMatrix(String contents , int width , int height) throws WriterException, IOException { if (ObjectUtil.isNull(width)) { width = DEFAULT_QR_CODE_WIDTH; } if (ObjectUtil.isNull(height)) { height = DEFAULT_QR_CODE_HEIGHT; } Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>(); hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H); // 纠错等级L,M,Q,H hints.put(EncodeHintType.CHARACTER_SET, DEFAULT_CHAR_SET);// 编码utf-8 hints.put(EncodeHintType.MARGIN, 1); // 边距 // 创建比特矩阵 BitMatrix bitMatrix = new MultiFormatWriter().encode(contents, BarcodeFormat.QR_CODE, width, height, hints); return bitMatrix; } /** * 创建二维码,返回字节数组 * @Date 2023/09/24 22:30 * @Param contents 二维码里的内容 * @Param imageFormat 图片后缀名 * @Param width 二维码宽度 * @param height 二维码高度 * @return byte[] */ public static byte[] createQrCode(String contents , String imageFormat , int width , int height) throws WriterException, IOException { if (StrUtil.isBlank(imageFormat)){ imageFormat = DEFAULT_FORMAT_NAME; } BitMatrix bitMatrix = createBitMatrix(contents , width, height); ByteArrayOutputStream os = new ByteArrayOutputStream(); MatrixToImageWriter.writeToStream(bitMatrix, imageFormat, os); return os.toByteArray(); } /** * 创建二维码,返回base64字符串 * @Date 2023/09/24 22:30 * @Param contents 二维码里的内容 * @Param imageFormat 图片后缀名 * @Param width 二维码宽度 * @param height 二维码高度 * @return byte[] */ public static String createQrCodeBase64(String contents , String imageFormat , int width , int height) throws WriterException, IOException { byte[] bytes =createQrCode(contents , imageFormat , width, height); return Base64.encode(bytes); } /** * 解码二维码 * @Date 2023/09/24 22:32 * @Param [image] * @return java.lang.String */ public static String decodeQrCode(BufferedImage image) throws Exception { if (image == null) return StrUtil.EMPTY; BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image); BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source)); Hashtable<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>(); hints.put(DecodeHintType.CHARACTER_SET, DEFAULT_CHAR_SET); Result result = new MultiFormatReader().decode(bitmap, hints); return result.getText(); } /** * 转换为BufferedImage * @Date 2023/09/24 22:32 * @Param [bitMatrix] * @return java.awt.image.BufferedImage */ public static BufferedImage toBufferedImage(BitMatrix bitMatrix) throws IOException, WriterException { MatrixToImageConfig matrixToImageConfig = new MatrixToImageConfig(0xFF000001, 0xFFFFFFFF); BufferedImage bufferedImage = MatrixToImageWriter.toBufferedImage(bitMatrix, matrixToImageConfig); return bufferedImage; } /** * 给二维码添加logo * @Date 2023/09/24 22:33 * @Param [bufferedImage, logoFile] * @return java.awt.image.BufferedImage */ public static BufferedImage addQrCodeLogo(BufferedImage bufferedImage, File logoFile) throws IOException { Graphics2D graphics = bufferedImage.createGraphics(); int matrixWidth = bufferedImage.getWidth(); int matrixHeigh = bufferedImage.getHeight(); // 读取logo图片文件 BufferedImage logo = ImageIO.read(logoFile); int logoWidth = logo.getWidth(); int logoHeight = logo.getHeight(); // 计算logo放置位置 int x = bufferedImage.getWidth() / 5*2; int y = bufferedImage.getHeight() / 5*2; int width = matrixWidth / 5; int height = matrixHeigh / 5; // 开始绘制图片 graphics.drawImage(logo, x, y, width, height, null); graphics.drawRoundRect(x, y, logoWidth, logoHeight, 15, 15); graphics.setStroke(new BasicStroke(5.0F, 1, 1)); graphics.setColor(Color.white); graphics.drawRect(x, y, logoWidth, logoHeight); graphics.dispose(); bufferedImage.flush(); return bufferedImage; } public static void main(String[] args) throws Exception { BufferedImage bufferedImage = toBufferedImage(createBitMatrix("https://blog.csdn.net", 300, 300)); ImageIO.write(bufferedImage, "png", new File("D:/qrcode.jpg")); System.out.println(decodeQrCode(bufferedImage)); BufferedImage logoQrCode = addQrCodeLogo(bufferedImage, new File("D://logo.png")); ImageIO.write(logoQrCode, "png", new File("D:/logoQrcode.jpg")); } }
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