java zxing实现二维码生成和解析zxing实现二维码生成和解析

小灰灰 2021-06-11 15:11 665阅读 0赞

[https://www.cnblogs.com/zhangzhen894095789/p/6623041.html][https_www.cnblogs.com_zhangzhen894095789_p_6623041.html]

### [zxing实现二维码生成和解析][zxing] ###

*   
 *  [二维码 zxing][zxing 1]

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][https_github.com_zxing_zxing_tree_zxing-3.0.0]

Java代码   ![收藏代码][icon_star.png]

1.  // 其中输出图像和读取图像的类在core包  
2.    
3.  MultiFormatReader  
4.    
5.  MultiFormatWriter  
6.    
7.  // 生成矩阵的类在javase的包里  
8.    
9.  MatrixToImageWriter

pom.xml中的配置为

Xml代码   ![收藏代码][icon_star.png]

1.  <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
2.      xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">  
3.      <modelVersion>4.0.0</modelVersion>  
4.    
5.      <groupId>com.shihy</groupId>  
6.      <artifactId>qrcode</artifactId>  
7.      <version>0.0.1-SNAPSHOT</version>  
8.      <packaging>jar</packaging>  
9.    
10.     <name>qrcode</name>  
11.     <url>http://maven.apache.org</url>  
12.   
13.     <properties>  
14.         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>  
15.     </properties>  
16.   
17.     <dependencies>  
18.         <dependency>  
19.             <groupId>com.google.zxing</groupId>  
20.             <artifactId>core</artifactId>  
21.             <version>3.0.0</version>  
22.         </dependency>  
23.         <dependency>  
24.             <groupId>com.google.zxing</groupId>  
25.             <artifactId>javase</artifactId>  
26.             <version>3.0.0</version>  
27.         </dependency>  
28.         <dependency>  
29.             <groupId>junit</groupId>  
30.             <artifactId>junit</artifactId>  
31.             <version>4.10</version>  
32.         </dependency>  
33.         <dependency>  
34.             <groupId>com.alibaba</groupId>  
35.             <artifactId>fastjson</artifactId>  
36.             <version>1.1.29</version>  
37.         </dependency>  
38.     </dependencies>  
39. </project>

生成图像与解析图像的测试工具类：

Java代码   ![收藏代码][icon_star.png]

1.  **package com.polysaas.edu.qrcode;  **
2.    
3.  **import java.awt.image.BufferedImage;  **
4.  **import java.io.File;  **
5.  **import java.io.IOException;  **
6.  **import java.nio.file.FileSystems;  **
7.  **import java.nio.file.Path;  **
8.  **import java.util.HashMap;  **
9.  **import java.util.Map;  **
10.   
11. **import javax.imageio.ImageIO;  **
12.   
13. **import org.junit.Test;  **
14.   
15. **import com.alibaba.fastjson.JSONObject;  **
16. **import com.google.zxing.BarcodeFormat;  **
17. **import com.google.zxing.Binarizer;  **
18. **import com.google.zxing.BinaryBitmap;  **
19. **import com.google.zxing.DecodeHintType;  **
20. **import com.google.zxing.EncodeHintType;  **
21. **import com.google.zxing.LuminanceSource;  **
22. **import com.google.zxing.MultiFormatReader;  **
23. **import com.google.zxing.MultiFormatWriter;  **
24. **import com.google.zxing.NotFoundException;  **
25. **import com.google.zxing.Result;  **
26. **import com.google.zxing.WriterException;  **
27. **import com.google.zxing.client.j2se.BufferedImageLuminanceSource;  **
28. **import com.google.zxing.client.j2se.MatrixToImageWriter;  **
29. **import com.google.zxing.common.BitMatrix;  **
30. **import com.google.zxing.common.HybridBinarizer;  **
31.   
32. **public class QRCodeTest \{  **
33.   
34.     /\*\* 
35.      \* 生成图像 
36.      \*  
37.      \* @throws WriterException 
38.      \* @throws IOException 
39.      \*/  
40.     @Test  
41.     **public void testEncode() throws WriterException, IOException \{  **
42.         String filePath = "D://";  
43.         String fileName = "zxing.png";  
44.         JSONObject json = **new JSONObject();  **
45.         json.put(  
46.                 "zxing",  
47.                 "https://github.com/zxing/zxing/tree/zxing-3.0.0/javase/src/main/java/com/google/zxing");  
48.         json.put("author", "shihy");  
49.         String content = json.toJSONString();// 内容  
50.         **int width = 200; // 图像宽度  **
51.         **int height = 200; // 图像高度  **
52.         String format = "png";// 图像类型  
53.         Map<EncodeHintType, Object> hints = **new HashMap<EncodeHintType, Object>();  **
54.         hints.put(EncodeHintType.CHARACTER\_SET, "UTF-8");  
55.         BitMatrix bitMatrix = **new MultiFormatWriter().encode(content,  **
56.                 BarcodeFormat.QR\_CODE, width, height, hints);// 生成矩阵  
57.         Path path = FileSystems.getDefault().getPath(filePath, fileName);  
58.         MatrixToImageWriter.writeToPath(bitMatrix, format, path);// 输出图像  
59.         System.out.println("输出成功.");  
60.     \}  
61.   
62.     /\*\* 
63.      \* 解析图像 
64.      \*/  
65.     @Test  
66.     **public void testDecode() \{  **
67.         String filePath = "D://zxing.png";  
68.         BufferedImage image;  
69.         **try \{  **
70.             image = ImageIO.read(**new File(filePath));  **
71.             LuminanceSource source = **new BufferedImageLuminanceSource(image);  **
72.             Binarizer binarizer = **new HybridBinarizer(source);  **
73.             BinaryBitmap binaryBitmap = **new BinaryBitmap(binarizer);  **
74.             Map<DecodeHintType, Object> hints = **new HashMap<DecodeHintType, Object>();  **
75.             hints.put(DecodeHintType.CHARACTER\_SET, "UTF-8");  
76.             Result result = **new MultiFormatReader().decode(binaryBitmap, hints);// 对图像进行解码  **
77.             JSONObject content = JSONObject.parseObject(result.getText());  
78.             System.out.println("图片中内容：  ");  
79.             System.out.println("author： " + content.getString("author"));  
80.             System.out.println("zxing：  " + content.getString("zxing"));  
81.             System.out.println("图片中格式：  ");  
82.             System.out.println("encode： " + result.getBarcodeFormat());  
83.         \} **catch (IOException e) \{  **
84.             e.printStackTrace();  
85.         \} **catch (NotFoundException e) \{  **
86.             e.printStackTrace();  
87.         \}  
88.     \}  
89. \}

测试生成图像为：

![f1c4cf6c-c825-3504-8c9e-97019e3796d1.png][]

解析到的内容为：

Java代码   ![收藏代码][icon_star.png]

1.  图片中内容：    
2.  author： shihy  
3.  zxing：  https://github.com/zxing/zxing/tree/zxing-3.0.0/javase/src/main/java/com/google/zxing  
4.  图片中格式：    
5.  encode： QR\_CODE

[https_www.cnblogs.com_zhangzhen894095789_p_6623041.html]: https://www.cnblogs.com/zhangzhen894095789/p/6623041.html
[zxing]: http://kesun-shy.iteye.com/blog/2154169
[zxing 1]: http://kesun-shy.iteye.com/category/327154
[https_github.com_zxing_zxing_tree_zxing-3.0.0]: https://github.com/zxing/zxing/tree/zxing-3.0.0
[icon_star.png]: /images/20210527/817de5b3fa7b417bac33b7c2a1016ca9.png
[f1c4cf6c-c825-3504-8c9e-97019e3796d1.png]: /images/20210527/8d7e3441854448db816950d5537a06fe.png