Java识别二维码及图片地址base64转化【工具类】

1.base64工具类

package com.example.quartz.utils;

import sun.misc.BASE64Encoder;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;

public class Base64Util {
    /**
     * @Description: 根据图片地址转换为base64编码字符串
     * @Author:
     * @CreateTime:
     * @return
     */
    public static String getImageStr(String imgFile) {
        InputStream inputStream = null;
        byte[] data = null;
        try {
            inputStream = new FileInputStream(imgFile);
            data = new byte[inputStream.available()];
            inputStream.read(data);
            inputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        // 加密
        BASE64Encoder encoder = new BASE64Encoder();
        return encoder.encode(data);
    }
}

2.工具类实现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;
    }
}

3.实例：

@ResponseBody
@RequestMapping(value="/imageUrl")
public String imageUrl(){
    String imageUrl = Base64Util.getImageStr("D:\\3.png");//调用根据图片路径获取图片转base64工具类
    System.out.println("二维码base64地址："+imageUrl);
    String Tool = QRCodeTools.deEncodeByBase64(imageUrl);//调用识别二维码工具类base64方法
    return Tool;
}