Java生成和解析二维码工具类（简单经典）

深藏阁楼爱情的钟 2024-03-30 12:18 39阅读 0赞

## Java生成和解析二维码工具类 ##

> 开箱即用，简单不废话。

#### pom.xml引入依赖 ####

<dependency>
    	<groupId>com.google.zxing</groupId>
    	<artifactId>core</artifactId>
    	<version>3.3.2</version>
    </dependency>
    
    <dependency>
    	<groupId>com.google.zxing</groupId>
    	<artifactId>javase</artifactId>
    	<version>3.3.2</version>
    </dependency>

#### 编写二维码读写工具类 ####

import java.awt.image.BufferedImage;
    import java.io.File;
    import java.io.IOException;
    import java.nio.file.Path;
    import java.util.HashMap;
    
    import javax.imageio.ImageIO;
    
    import com.google.zxing.BarcodeFormat;
    import com.google.zxing.BinaryBitmap;
    import com.google.zxing.EncodeHintType;
    import com.google.zxing.MultiFormatReader;
    import com.google.zxing.MultiFormatWriter;
    import com.google.zxing.NotFoundException;
    import com.google.zxing.Result;
    import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
    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;
    
    /**
     * 二维码生成解析工具类
     */
    public class  QrCodeUtils{
        
    
        public static final int WIDTH = 300;//二维码宽度
        public static final int HEIGHT = 300;//二维码高度
        public static final String FORMAT = "png";//图片格式
        public static final String CHARTSET = "utf-8";//字符集格式
    
        /**
         * 生成二维码
         * @param filePath 图片保存地址
         * @param contents 二维码内容
         */
        public static void createQRcode(String filePath, String contents) {
        
            /**
             * 如果用的jdk是1.9，需要配置下面这一行。
             */
            //System.setProperty("java.specification.version", "1.9");
            HashMap<EncodeHintType, Object> hints = new HashMap<>();
            hints.put(EncodeHintType.CHARACTER_SET, CHARTSET);
            hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
            hints.put(EncodeHintType.MARGIN, 2);
            try {
        
                BitMatrix bitMatrix = new MultiFormatWriter().encode(contents, BarcodeFormat.QR_CODE, WIDTH, HEIGHT, hints);
                Path file = new File(filePath).toPath();
                MatrixToImageWriter.writeToPath(bitMatrix, FORMAT, file);
            } catch (Exception e) {
        
                e.printStackTrace();
            }
        }
    
        /**
         * 读取二维码
         * @param filePath 二维码图片地址
         * @return
         */
        public static Result getQRresult(String filePath) {
        
            /**
             * 如果用的jdk是1.9，需要配置下面这一行。
             */
            //System.setProperty("java.specification.version", "1.9");
            Result result = null;
            try {
        
                File file = new File(filePath);
    
                BufferedImage bufferedImage = ImageIO.read(file);
                BinaryBitmap bitmap = new BinaryBitmap(
                        new HybridBinarizer(new BufferedImageLuminanceSource(bufferedImage)));
    
                HashMap hints = new HashMap<>();
                hints.put(EncodeHintType.CHARACTER_SET, CHARTSET);
                result = new MultiFormatReader().decode(bitmap, hints);
            } catch (NotFoundException e) {
        
                e.printStackTrace();
            } catch (IOException e) {
        
                e.printStackTrace();
            }
    
            return result;
        }
    
        /**
         * 测试方法
         */
        public static void main(String[] args) {
        
            //测试生成二维码
            QrCodeUtils.createQRcode("d://test.png","http://www.baidu.com");
            
            //测试解析二维码内容
            Result qRresult = QrCodeUtils.getQRresult("d://test.png");
            //码内容
            System.out.println(qRresult.getText());
            //码类型
            System.out.println(qRresult.getBarcodeFormat());
        }
    }

## 求关注~~~ ##

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 <tbody> 
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