zxing实现二维码生成和解析

二维码的生成与解析。有多种途径。我选择用大品牌，google老大的zxing。

gitHub链接是(我用的3.0.0，已经是nio了)

https://github.com/zxing/zxing/tree/zxing-3.0.0

 

 

Java代码  

// 其中输出图像和读取图像的类在core包  

  

MultiFormatReader  

  

MultiFormatWriter  

  

// 生成矩阵的类在javase的包里  

  

MatrixToImageWriter  

 

pom.xml中的配置为

Xml代码  

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  

    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">  

    <modelVersion>4.0.0</modelVersion>  

  

    <groupId>com.shihy</groupId>  

    <artifactId>qrcode</artifactId>  

    <version>0.0.1-SNAPSHOT</version>  

    <packaging>jar</packaging>  

  

    <name>qrcode</name>  

    <url>http://maven.apache.org</url>  

  

    <properties>  

        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>  

    </properties>  

  

    <dependencies>  

        <dependency>  

            <groupId>com.google.zxing</groupId>  

            <artifactId>core</artifactId>  

            <version>3.0.0</version>  

        </dependency>  

        <dependency>  

            <groupId>com.google.zxing</groupId>  

            <artifactId>javase</artifactId>  

            <version>3.0.0</version>  

        </dependency>  

        <dependency>  

            <groupId>junit</groupId>  

            <artifactId>junit</artifactId>  

            <version>4.10</version>  

        </dependency>  

        <dependency>  

            <groupId>com.alibaba</groupId>  

            <artifactId>fastjson</artifactId>  

            <version>1.1.29</version>  

        </dependency>  

    </dependencies>  

</project>  

 

生成图像与解析图像的测试工具类：

Java代码  

package com.polysaas.edu.qrcode;  

  

import java.awt.image.BufferedImage;  

import java.io.File;  

import java.io.IOException;  

import java.nio.file.FileSystems;  

import java.nio.file.Path;  

import java.util.HashMap;  

import java.util.Map;  

  

import javax.imageio.ImageIO;  

  

import org.junit.Test;  

  

import com.alibaba.fastjson.JSONObject;  

import com.google.zxing.BarcodeFormat;  

import com.google.zxing.Binarizer;  

import com.google.zxing.BinaryBitmap;  

import com.google.zxing.DecodeHintType;  

import com.google.zxing.EncodeHintType;  

import com.google.zxing.LuminanceSource;  

import com.google.zxing.MultiFormatReader;  

import com.google.zxing.MultiFormatWriter;  

import com.google.zxing.NotFoundException;  

import com.google.zxing.Result;  

import com.google.zxing.WriterException;  

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;  

  

public class QRCodeTest {  

  

    /** 

     * 生成图像 

     *  

     * @throws WriterException 

     * @throws IOException 

     */  

    @Test  

    public void testEncode() throws WriterException, IOException {  

        String filePath = "D://";  

        String fileName = "zxing.png";  

        JSONObject json = new JSONObject();  

        json.put(  

                "zxing",  

                "https://github.com/zxing/zxing/tree/zxing-3.0.0/javase/src/main/java/com/google/zxing");  

        json.put("author", "shihy");  

        String content = json.toJSONString();// 内容  

        int width = 200; // 图像宽度  

        int height = 200; // 图像高度  

        String format = "png";// 图像类型  

        Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();  

        hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");  

        BitMatrix bitMatrix = new MultiFormatWriter().encode(content,  

                BarcodeFormat.QR_CODE, width, height, hints);// 生成矩阵  

        Path path = FileSystems.getDefault().getPath(filePath, fileName);  

        MatrixToImageWriter.writeToPath(bitMatrix, format, path);// 输出图像  

        System.out.println("输出成功.");  

    }  

  

    /** 

     * 解析图像 

     */  

    @Test  

    public void testDecode() {  

        String filePath = "D://zxing.png";  

        BufferedImage image;  

        try {  

            image = ImageIO.read(new File(filePath));  

            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);// 对图像进行解码  

            JSONObject content = JSONObject.parseObject(result.getText());  

            System.out.println("图片中内容：  ");  

            System.out.println("author： " + content.getString("author"));  

            System.out.println("zxing：  " + content.getString("zxing"));  

            System.out.println("图片中格式：  ");  

            System.out.println("encode： " + result.getBarcodeFormat());  

        } catch (IOException e) {  

            e.printStackTrace();  

        } catch (NotFoundException e) {  

            e.printStackTrace();  

        }  

    }  

}  

 

测试生成图像为：

 

 

 

解析到的内容为：

Java代码  

图片中内容：    

author： shihy  

zxing：  https://github.com/zxing/zxing/tree/zxing-3.0.0/javase/src/main/java/com/google/zxing  

图片中格式：    

encode： QR_CODE