二维码生成工具

 

需导入依赖

1 <dependency>
2 <groupId>com.google.zxing</groupId>
3 <artifactId>core</artifactId>
4 <version>3.4.0</version>
5 </dependency>

 

createBar方法入参为二维码内容、存放路径、文件名

 3 import java.awt.image.BufferedImage;
 4 import java.io.File;
 5 import java.io.IOException;
 6 import java.io.OutputStream;
 7 import java.util.Hashtable;
 8 import javax.imageio.ImageIO;
 9 import com.google.zxing.BarcodeFormat;
10 import com.google.zxing.EncodeHintType;
11 import com.google.zxing.MultiFormatWriter;
12 import com.google.zxing.WriterException;
13 import com.google.zxing.common.BitMatrix;
14 
15 
16 /**
17  * @author Yanzm
18  * @Date 2019年12月4日
19  */
20 public class BarUtils {
21     private static final int BLACK = 0xFF000000;
22     private static final int WHITE = 0xFFFFFFFF;
23 
24     public static BufferedImage toBufferedImage(BitMatrix matrix) {
25         int width = matrix.getWidth();
26         int height = matrix.getHeight();
27         BufferedImage image = new BufferedImage(width, height,
28                 BufferedImage.TYPE_INT_RGB);
29         for (int x = 0; x < width; x++) {
30             for (int y = 0; y < height; y++) {
31                 image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);
32             }
33         }
34         return image;
35     }
36 
37     public static void writeToFile(BitMatrix matrix, String format, File file) throws IOException {
38         BufferedImage image = toBufferedImage(matrix);
39         if (!ImageIO.write(image, format, file)) {
40             throw new IOException("Could not write an image of format " + format + " to " + file);
41         }
42     }
43 
44     public static void writeToStream(BitMatrix matrix, String format,OutputStream stream) throws IOException {
45         BufferedImage image = toBufferedImage(matrix);
46         if (!ImageIO.write(image, format, stream)) {
47             throw new IOException("Could not write an image of format " + format);
48         }
49     }
50     
51     public static void createBar(String content,String basePath,String barName){
52         String text = content;                     // 二维码内容  
53         int width = 350;                         // 二维码图片宽度  
54         int height = 350;                         // 二维码图片高度  
55         String format = "gif";                    // 二维码的图片格式  
56         Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();  
57         hints.put(EncodeHintType.CHARACTER_SET, "utf-8");           // 内容所使用字符集编码    
58         BitMatrix bitMatrix = null;
59         try {
60            bitMatrix = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height, hints);
61         } catch (WriterException e) {
62             e.printStackTrace();
63         }  
64         // 生成二维码  
65         String pname = basePath + File.separator +barName + "." +format;    
66         File outputFile = new File(pname); 
67         if (!outputFile.exists()) {
68             outputFile.mkdirs();
69         }
70         try {
71             BarUtils.writeToFile(bitMatrix, format, outputFile);
72         } catch (IOException e) {
73             e.printStackTrace();
74         } 
75     }
76     
77    public static void main(String[] args) throws Exception {
78        createBar("https://www.baidu.com","D://desktop","123");
79     }  
80 }

 

 

 

posted @ 2019-12-04 18:08  老YAN  阅读(261)  评论(0)  编辑  收藏  举报