Java识别二维码【工具类】

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

    
      com.google.zxing
      javase
      3.2.1
    
    

    com.google.zxing
    core
    3.3.3

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 hints = new HashMap();
            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 hints = new HashMap();
            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;
    }
}