JAVA-生成二维码图片
有很多大佬写了,但是这种花里胡哨的活我最喜欢搞了
首先是依赖
官网地址:https://mvnrepository.com/artifact/com.google.zxing/core
一般找用的最多的,相对稳定,出问题了也肯定有大佬给出相对应的解决办法
码圈开源大佬yyds
点进去
看自己需求下不下jar包
我这直接导入依赖
<!-- https://mvnrepository.com/artifact/com.google.zxing/core -->
<dependency><groupId>com.google.zxing</groupId><artifactId>core</artifactId><version>3.3.0</version>
</dependency>
测试的话会依赖junit
<!-- https://mvnrepository.com/artifact/junit/junit -->
<dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.12</version><scope>test</scope>
</dependency>
依赖添加后创建一个工具类
我的是叫 QRCodeUtil
在main方法修改main函数里二维码内容运行即可
我的是生成在E盘,大家根据直接需求更改
代码放最后了直接CV
生成的二维码效果如图(是一首我超爱的歌):
你!才!会!收!到!暗!号!!!(伸手转圈)
/*** @author qingchen* @date 3/8/2022 下午 1:36*/public class QRCodeUtil {private static final int BLACK = 0xFF000000;private static final int WHITE = 0xFFFFFFFF;public static BufferedImage toBufferedImage(BitMatrix matrix) {int width = matrix.getWidth();int height = matrix.getHeight();BufferedImage image = new BufferedImage(width, height,BufferedImage.TYPE_INT_RGB);for (int x = 0; x < width; x++) {for (int y = 0; y < height; y++) {image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);}}return image;}public static void writeToFile(BitMatrix matrix, String format, File file)throws IOException {BufferedImage image = toBufferedImage(matrix);if (!ImageIO.write(image, format, file)) {throw new IOException("Could not write an image of format "+ format + " to " + file);}}public static void writeToStream(BitMatrix matrix, String format, OutputStream stream) throws IOException {BufferedImage image = toBufferedImage(matrix);if (!ImageIO.write(image, format, stream)) {throw new IOException("Could not write an image of format " + format);}}public static void main(String[] args) throws Exception {// 二维码内容String text = "这里删除后填写你想跳转的网址:比如:www.baidu.com ";// 二维码图片宽度int width = 300;// 二维码图片高度int height = 300;// 二维码的图片格式String format = "jpg";// 内容所使用字符集编码Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();hints.put(EncodeHintType.CHARACTER_SET, "utf-8");BitMatrix bitMatrix = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height, hints);// 生成二维码路径 我这里直接在E盘生成File outputFile = new File("e:" + File.separator + "new.jpg");QRCodeUtil.writeToFile(bitMatrix, format, outputFile);}
}