二维码生成与解析

不念不忘少年蓝@ 2022-08-07 03:37 176阅读 0赞

1.  <project xmlns="[http://maven.apache.org/POM/4.0.0][http_maven.apache.org_POM_4.0.0]" xmlns:xsi="[http://www.w3.org/2001/XMLSchema-instance][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][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][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

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][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. \}

[http_maven.apache.org_POM_4.0.0]: http://maven.apache.org/POM/4.0.0
[http_www.w3.org_2001_XMLSchema-instance]: http://www.w3.org/2001/XMLSchema-instance
[http_maven.apache.org_POM_4.0.0_http_maven.apache.org_xsd_maven-4.0.0.xsd]: http://maven.apache.org/POM/4.0.0%20http://maven.apache.org/xsd/maven-4.0.0.xsd
[http_maven.apache.org]: http://maven.apache.org
[https_github.com_zxing_zxing_tree_zxing-3.0.0_javase_src_main_java_com_google_zxing]: https://github.com/zxing/zxing/tree/zxing-3.0.0/javase/src/main/java/com/google/zxing