二维码生成器和解析器-java

 1     private static final int BLACK = 0xff000000;
 2     private static final int WHITE = 0xFFFFFFFF;
 3     public static void main(String[] args) throws Exception {
 4         File file = new File("f://test.png");
 5         TestImg test = new TestImg();
 6         test.encode("duwenlei", file,BarcodeFormat.QR_CODE, 200, 200, null);
 7         test.decode(file);
 8     }
 9 
10     public void encode(String contents, File file, BarcodeFormat format,
11             int width, int height, Map<EncodeHintType, ?> hints) throws Exception {
12         BitMatrix bitMatrix =  new MultiFormatWriter().encode(contents, format, width, height);
13         writeToFile(bitMatrix, "png", file);
14     }
15     /**
16      * 生成二维码图片<br>
17      * 
18      * @param matrix
19      * @param format
20      *            图片格式
21      * @param file
22      *            生成二维码图片位置
23      * @throws IOException
24      */
25     public static void writeToFile(BitMatrix matrix, String format, File file) throws IOException {
26         BufferedImage image = toBufferedImage(matrix);
27         ImageIO.write(image, format, file);
28     }
29 
30     /**
31      * 生成二维码内容<br>
32      * 
33      * @param matrix
34      * @return
35      */
36     public static BufferedImage toBufferedImage(BitMatrix matrix) {
37         int width = matrix.getWidth();
38         int height = matrix.getHeight();
39         BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
40         for (int x = 0; x < width; x++) {
41             for (int y = 0; y < height; y++) {
42                 image.setRGB(x, y, matrix.get(x, y) == true ? BLACK : WHITE);
43             }
44         }
45         return image;
46     }
47 
48     /**
49      * 解析QRCode二维码
50      */
51     @SuppressWarnings("unchecked")
52     public void decode(File file) {
53         try {
54             BufferedImage image;
55             try {
56                 image = ImageIO.read(file);
57                 if (image == null) {
58                     System.out.println("Could not decode image");
59                 }
60                 LuminanceSource source = new BufferedImageLuminanceSource(image);
61                 BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
62                 Result result;
63                 @SuppressWarnings("rawtypes")
64                 Hashtable hints = new Hashtable();
65                 //解码设置编码方式为：utf-8
66                 hints.put(DecodeHintType.CHARACTER_SET, "utf-8");
67                 result = new MultiFormatReader().decode(bitmap, hints);
68                 String resultStr = result.getText();
69                 System.out.println("解析后内容：" + resultStr);
70             } catch (IOException ioe) {
71                 System.out.println(ioe.toString());
72             } catch (ReaderException re) {
73                 System.out.println(re.toString());
74             }
75         } catch (Exception ex) {
76             System.out.println(ex.toString());
77         }
78     }