google zxing 生成和解析二维码

maven 项目pom.xml文件配置

<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>
      <scope>test</scope>
    </dependency>
     <dependency>  
            <groupId>com.alibaba</groupId>  
            <artifactId>fastjson</artifactId>  
            <version>1.1.29</version>  
        </dependency>
    
  </dependencies>
</project>

生成与解析二维码代码

package com.shihy.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);// 设置生成什么类型的码，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  
            //System.out.println(result.getText());
            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();  
        }  
    }  
}

注：

代码中的字符集utf-8必须小写，不能大写，否则生成的二维码无法被其他终端识别，具体原因请参见博文

用Zxing 的core和javase包生成二维码，手机端无法识别，求指导

参考博文：

http://kesun-shy.iteye.com/blog/2154169

本文出自 “点滴积累” 博客，请务必保留此出处http://tianxingzhe.blog.51cto.com/3390077/1661937