Java识别二维码【工具类】

小鱼儿 2022-05-08 00:54 233阅读 0赞

工具类已经实现**Base64二维码图片识别**和**路径图片识别**

所需maven依赖

<dependency>
          <groupId>com.google.zxing</groupId>
          <artifactId>javase</artifactId>
          <version>3.2.1</version>
        </dependency>
        
    <dependency>
        <groupId>com.google.zxing</groupId>
        <artifactId>core</artifactId>
        <version>3.3.3</version>
    </dependency>

工具类代码，直接复制修改package可用

package com.jplus.common.utils.qrcode;
    
    import com.google.zxing.*;
    import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
    import com.google.zxing.common.HybridBinarizer;
    import sun.misc.BASE64Decoder;
    
    import javax.imageio.ImageIO;
    import java.awt.image.BufferedImage;
    import java.io.ByteArrayInputStream;
    import java.io.File;
    import java.io.IOException;
    import java.util.HashMap;
    import java.util.Map;
    /**
     * 作用：二维码识别（图片）
     * 作者：Tiddler
     * 时间：2018-08-2018/8/31 16：23
     * 类名：QRCodeTools
     **/
    public class QRCodeTools {
        /**
         * 解析二维码解析,此方法是解析Base64格式二维码图片
         * baseStr:base64字符串,data:image/png;base64开头的
         */
        public static String deEncodeByBase64(String baseStr) {
            String content = null;
            BufferedImage image;
            BASE64Decoder decoder = new BASE64Decoder();
            byte[] b=null;
            try {
                int i = baseStr.indexOf("data:image/png;base64,");
                baseStr = baseStr.substring(i+"data:image/png;base64,".length());//去掉base64图片的data:image/png;base64,部分才能转换为byte[]
    
                b = decoder.decodeBuffer(baseStr);//baseStr转byte[]
                ByteArrayInputStream byteArrayInputStream=new ByteArrayInputStream(b);//byte[] 转BufferedImage
                image = ImageIO.read(byteArrayInputStream);
                LuminanceSource source = new BufferedImageLuminanceSource(image);
                Binarizer binarizer = new HybridBinarizer(source);
                BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);
                Map<DecodeHintType, Object> hints = new HashMap<DecodeHintType, Object>();
                hints.put(DecodeHintType.CHARACTER_SET, "UTF-8");
                Result result = new MultiFormatReader().decode(binaryBitmap, hints);//解码
                System.out.println("图片中内容：  ");
                System.out.println("content： " + result.getText());
                content = result.getText();
            } catch (IOException e) {
                e.printStackTrace();
            } catch (NotFoundException e) {
                e.printStackTrace();
            }
            return content;
        }
        /**
         * 解析二维码,此方法解析一个路径的二维码图片
         * path:图片路径
         */
        public static String deEncodeByPath(String path) {
            String content = null;
            BufferedImage image;
            try {
                image = ImageIO.read(new File(path));
                LuminanceSource source = new BufferedImageLuminanceSource(image);
                Binarizer binarizer = new HybridBinarizer(source);
                BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);
                Map<DecodeHintType, Object> hints = new HashMap<DecodeHintType, Object>();
                hints.put(DecodeHintType.CHARACTER_SET, "UTF-8");
                Result result = new MultiFormatReader().decode(binaryBitmap, hints);//解码
                System.out.println("图片中内容：  ");
                System.out.println("content： " + result.getText());
                content = result.getText();
            } catch (IOException e) {
                e.printStackTrace();
            } catch (NotFoundException e) {
                e.printStackTrace();
            }
            return content;
        }
    }