生成二维码

缺乏、安全感 2023-07-15 12:52 170阅读 0赞

### 引入依赖 ###

<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>

### 代码 ###

public class QCRUtils {
    
        private static final String PNG = "png";
    
        private static final Integer WIDTH = 300;
    
        private static final Integer HEIGHT = 300;
    
        public static void main(String[] args) {
            generated("www.baidu.com");
        }
        public static void generated(String content) {
            Path path = Paths.get("/QCR/QCR.PNG");
            // 定义二维码的配置，使用HashMap
            HashMap hints = new HashMap(4);
            // 字符集，内容使用的编码
            hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
            // 容错等级，H、L、M、Q
            hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
            // 边距，二维码距离边的空白宽度
            hints.put(EncodeHintType.MARGIN, 2);
    
            try {
                // 生成二维码对象，传入参数：内容、码的类型、宽高、配置
                BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, WIDTH, HEIGHT, hints);
                // 生成二维码，传入二维码对象、生成图片的格式、生成的路径
                MatrixToImageWriter.writeToPath(bitMatrix, PNG, path);
            } catch (WriterException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }