ZXing 生成二维码 QRCode 和条码 CODE128

以你之姓@ 2024-04-18 16:02 13阅读 0赞

# ZXing 生成二维码 QRCode 和条码 CODE128 和 ZXing 解析或读取 QR\_Code 和 条码 CODE\_128 #

2019年02月20日 01:15:24 [\_\_\_NULL][NULL] 阅读数 736更多

分类专栏： [ 所有 ][Link 1] [ Java 算法 ][Java _]

本文链接：[https://blog.csdn.net/joyous/article/details/87748303][https_blog.csdn.net_joyous_article_details_87748303]

二维码是国际标准，由日本某公司发明，并保留版权，免费让全世界使用，目前在中国金融支付领域大放异彩。

条码的联合发明人诺曼·约瑟夫·伍德兰德（Norman Joseph Woodland）于上世纪70年代发明了条形码，这一技术的发明几乎对全球商业活动产生了一场革命，并为消费者在超市的购物节约了大量时间。日前在自己位于新泽西的家中不幸去世，享年91岁。

二维码和条码的生成使用 zxing，zxing 是开源的条码及二维码生成框架，[https://github.com/zxing/zxing/][https_github.com_zxing_zxing] 免费获取，目前版本 ver 3.3.3。

以下是测试生成的代码，内容将保存在 c:\\temp\\a.png 和 c:\\temp\\b.png 两个图片文件内。

1.   
2.  `/*`
3.  `* 2019-2-20`
4.  `* 测试 zxing 3.3.3 二维码和条码生成`
5.  `*/`
6.   
7.  `import java.io.BufferedOutputStream;`
8.  `import java.io.File;`
9.  `import java.io.FileOutputStream;`
10. `import java.io.IOException;`
11. `import java.util.Hashtable;`
12.  
13. `import com.google.zxing.BarcodeFormat;`
14. `import com.google.zxing.EncodeHintType;`
15. `import com.google.zxing.MultiFormatWriter;`
16. `import com.google.zxing.WriterException;`
17. `import com.google.zxing.client.j2se.MatrixToImageWriter;`
18. `import com.google.zxing.common.BitMatrix;`
19. `import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;`
20.  
21. `public class WriteQRCode`
22. `{`
23.  
24. `public static void main(String[] args)`
25. `{`
26. `int width = 200;`
27. `int height = 200;`
28.  
29. `// 写 二维码`
30. `TestWriteRCode("c:/temp/a.png", BarcodeFormat.QR_CODE, "二维码文字信息, Hello world", width, height);`
31.  
32. `// 写条码`
33. `height = 50;`
34. `TestWriteRCode("c:/temp/b.png", BarcodeFormat.CODE_128, "ABC123456abc", width, height);`
35. `}`
36.  
37. `/**`
38. `* 将字符串信息写入 QRCode`
39. `*`
40. `* @param fileName`
41. `* 指定文件名`
42. `* @param strContents`
43. `* 写入的内容`
44. `* @param width`
45. `* 尺寸宽`
46. `* @param height`
47. `* 尺寸高`
48. `*/`
49. `public static void TestWriteRCode(String fileName, BarcodeFormat typeCode, String strContents, int width, int height)`
50. `{`
51. `Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();`
52. `// 字符集`
53. `hints.put(EncodeHintType.CHARACTER_SET, "GBK");// Constant.CHARACTER);`
54. `// 容错质量`
55. `hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);`
56.  
57. `try`
58. `{`
59. `// 尺寸`
60. `BitMatrix bitMatrix = new MultiFormatWriter().encode(strContents, typeCode, width, height, hints);`
61. `BufferedOutputStream buffer = null;`
62. `buffer = new BufferedOutputStream(new FileOutputStream(fileName));`
63. `// ok`
64. `MatrixToImageWriter.writeToStream(bitMatrix, "png", new FileOutputStream(new File(fileName)));`
65. `buffer.close();`
66. `}`
67. `catch (WriterException e)`
68. `{`
69. `e.printStackTrace();`
70. `}`
71. `catch (IOException e)`
72. `{`
73. `e.printStackTrace();`
74. `}`
75.  
76. `}`
77. `}`

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2pveW91cw_size_16_color_FFFFFF_t_70][]

![20190220151542585.png][]

![20190220151557436.png][]

生成成功将得到两个 png 文件。

以下是读取 c:\\temp\\a.png 和 c:\\temp\\b.png 内的条码及二维码。

1.   
2.  `/*`
3.  `* 2019-2-20`
4.  `* 测试 zxing 3.3.3 二维码和条码读取`
5.  `*/`
6.   
7.  `import java.awt.image.BufferedImage;`
8.  `import java.io.File;`
9.  `import java.io.IOException;`
10. `import java.util.ArrayList;`
11. `import java.util.Arrays;`
12. `import java.util.Collection;`
13. `import java.util.EnumMap;`
14. `import java.util.EnumSet;`
15. `import java.util.Map;`
16.  
17. `import javax.imageio.ImageIO;`
18.  
19. `import com.google.zxing.BarcodeFormat;`
20. `import com.google.zxing.BinaryBitmap;`
21. `import com.google.zxing.ChecksumException;`
22. `import com.google.zxing.DecodeHintType;`
23. `import com.google.zxing.FormatException;`
24. `import com.google.zxing.LuminanceSource;`
25. `import com.google.zxing.MultiFormatReader;`
26. `import com.google.zxing.NotFoundException;`
27. `import com.google.zxing.Reader;`
28. `import com.google.zxing.ReaderException;`
29. `import com.google.zxing.Result;`
30. `import com.google.zxing.client.j2se.BufferedImageLuminanceSource;`
31. `import com.google.zxing.client.j2se.ImageReader;`
32. `import com.google.zxing.common.GlobalHistogramBinarizer;`
33. `import com.google.zxing.common.HybridBinarizer;`
34. `import com.google.zxing.multi.GenericMultipleBarcodeReader;`
35. `import com.google.zxing.multi.MultipleBarcodeReader;`
36.  
37. `public class ReadCode`
38. `{`
39. `private static final Map<DecodeHintType, Object> HINTS;`
40. `private static final Map<DecodeHintType, Object> HINTS_PURE;`
41.  
42. `static`
43. `{`
44. `HINTS = new EnumMap<>(DecodeHintType.class);`
45. `HINTS.put(DecodeHintType.TRY_HARDER, Boolean.TRUE);`
46. `HINTS.put(DecodeHintType.POSSIBLE_FORMATS, EnumSet.allOf(BarcodeFormat.class));`
47. `HINTS_PURE = new EnumMap<>(HINTS);`
48. `HINTS_PURE.put(DecodeHintType.PURE_BARCODE, Boolean.TRUE);`
49. `}`
50.  
51. `public static void main(String[] args)`
52. `{`
53. `BufferedImage image = null;`
54. `try`
55. `{`
56. `image = ImageIO.read(new File("c:/temp/a.jpg"));`
57. `ProcessImage(image);`
58.  
59. `image = ImageIO.read(new File("c:/temp/b.png"));`
60. `ProcessImage(image);`
61. `}`
62. `catch (IOException e)`
63. `{`
64. `}`
65.  
66. `}`
67.  
68. `private static void ProcessImage(BufferedImage image)`
69. `{`
70. `LuminanceSource source = new BufferedImageLuminanceSource(image);`
71. `BinaryBitmap bitmap = new BinaryBitmap(new GlobalHistogramBinarizer(source));`
72. `Collection<Result> results = new ArrayList<>(1);`
73.  
74. `try`
75. `{`
76.  
77. `Reader reader = new MultiFormatReader();`
78. `ReaderException savedException = null;`
79. `try`
80. `{`
81. `// Look for multiple barcodes`
82. `MultipleBarcodeReader multiReader = new GenericMultipleBarcodeReader(reader);`
83. `Result[] theResults = multiReader.decodeMultiple(bitmap, HINTS);`
84. `if (theResults != null)`
85. `{`
86. `results.addAll(Arrays.asList(theResults));`
87. `}`
88. `}`
89. `catch (ReaderException re)`
90. `{`
91. `savedException = re;`
92. `}`
93.  
94. `if (results.isEmpty())`
95. `{`
96. `try`
97. `{`
98. `// Look for pure barcode`
99. `Result theResult = reader.decode(bitmap, HINTS_PURE);`
100. `if (theResult != null)`
101. `{`
102. `results.add(theResult);`
103. `}`
104. `}`
105. `catch (ReaderException re)`
106. `{`
107. `savedException = re;`
108. `}`
109. `}`
110.  
111. `if (results.isEmpty())`
112. `{`
113. `try`
114. `{`
115. `// Look for normal barcode in photo`
116. `Result theResult = reader.decode(bitmap, HINTS);`
117. `if (theResult != null)`
118. `{`
119. `results.add(theResult);`
120. `}`
121. `}`
122. `catch (ReaderException re)`
123. `{`
124. `savedException = re;`
125. `}`
126. `}`
127.  
128. `if (results.isEmpty())`
129. `{`
130. `try`
131. `{`
132. `// Try again with other binarizer`
133. `BinaryBitmap hybridBitmap = new BinaryBitmap(new HybridBinarizer(source));`
134. `Result theResult = reader.decode(hybridBitmap, HINTS);`
135. `if (theResult != null)`
136. `{`
137. `results.add(theResult);`
138. `}`
139. `}`
140. `catch (ReaderException re)`
141. `{`
142. `savedException = re;`
143. `}`
144. `}`
145.  
146. `if (results.isEmpty())`
147. `{`
148. `try`
149. `{`
150. `throw savedException == null ? NotFoundException.getNotFoundInstance() : savedException;`
151. `}`
152. `catch (FormatException | ChecksumException e)`
153. `{`
154. `// log.info(e.toString());`
155. `}`
156. `catch (ReaderException e)`
157. `{ // Including NotFoundException`
158. `// log.info(e.toString());`
159. `}`
160. `return;`
161. `}`
162.  
163. `for (Result result : results)`
164. `{`
165. `System.out.println(result.getText());`
166. `}`
167.  
168. `}`
169. `catch (RuntimeException re)`
170. `{`
171. `// Call out unexpected errors in the log clearly`
172. `// log.log(Level.WARNING, "Unexpected exception from library", re);`
173. `}`
174. `}`
175.  
176. `}`

![20190220011433233.png][]

运行读取测试程序，将输出相应的内容。

这里顺便提一下，若二维码或者条码在一个含有表格、文字的富文本文档转换的图片中，也是可以被识别出来的，但会略微消耗一点时间。

[NULL]: https://me.csdn.net/joyous
[Link 1]: https://blog.csdn.net/joyous/article/category/1112594
[Java _]: https://blog.csdn.net/joyous/article/category/1511947
[CC 4.0 BY-SA]: http://creativecommons.org/licenses/by-sa/4.0/
[https_blog.csdn.net_joyous_article_details_87748303]: https://blog.csdn.net/joyous/article/details/87748303
[https_github.com_zxing_zxing]: https://github.com/zxing/zxing/
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2pveW91cw_size_16_color_FFFFFF_t_70]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/18/d2ddda8c6e2d47098bde97b76fa58c96.png
[20190220151542585.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/18/fb956db08dda47509374403418993c7f.png
[20190220151557436.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/18/48fa4c08ccd64e8b98d4433d5665969b.png
[20190220011433233.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/18/66d7c4716ccd44b7bdceeb800f30abea.png