如何生成二维码代码详解

来源：互联网发布：小米手环无法同步数据编辑：程序博客网时间：2024/06/14 03:27
如何生成二维码代码详解，具体实现可以查看原文http://my.oschina.net/mkh/blog/151633
1. [代码][Java]代码跳至 [1] [全屏预览]

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
    importjava.awt.image.BufferedImage; 
    importjava.io.File; 
    importjava.io.IOException; 
    importjava.util.Hashtable; 
    importjava.util.Scanner;
    importjavax.imageio.ImageIO; 
    importcom.google.zxing.BarcodeFormat; 
    importcom.google.zxing.BinaryBitmap; 
    importcom.google.zxing.DecodeHintType; 
    importcom.google.zxing.LuminanceSource; 
    importcom.google.zxing.MultiFormatReader; 
    importcom.google.zxing.MultiFormatWriter; 
    importcom.google.zxing.Reader; 
    importcom.google.zxing.ReaderException; 
    importcom.google.zxing.Result; 
    importcom.google.zxing.client.j2se.BufferedImageLuminanceSource; 
    importcom.google.zxing.client.j2se.MatrixToImageWriter; 
    importcom.google.zxing.common.BitMatrix; 
    importcom.google.zxing.common.HybridBinarizer; 
        
    publicclass TestEnDeCode { 
        
        /**
         *
         */
        publicTestEnDeCode() { 
            // TODO Auto-generated constructor stub 
        }
        
        /**
         * @param args
         */
        publicstatic void main(String[] args) { 
            TestEnDeCode t=newTestEnDeCode(); 
            Scanner in = newScanner(System.in);
            System.out.println("编码内容：");
            String str = in.next();
//            String str = "http://www.baidu.com";
            String path = "D:/Qr_pics/test7.png";
            t.encode(str, path); 
            t.decode(path);
        }
        
        /*
         * 编码：
         * 1 将内容转换成二维矩阵
         * 2 将该二维矩阵转换成图片
         * */
        publicvoid encode(String str, String path) { 
            try{ 
//                String str = "http://www.baidu.com百度看看";// 二维码内容 
//                String path = "D:/Qr_pics/test7.png"; //二维码图片生成 路径及名称
                BitMatrix byteMatrix; 
                byteMatrix = newMultiFormatWriter().encode(newString(str.getBytes("UTF-8"),"UTF-8"), BarcodeFormat.QR_CODE, 800,800);//将文字转换成二维矩阵，并设置矩阵大小，这里的矩阵大小就是后面生成的图片像素大小
                File file = newFile(path);//新建矩阵文件
                MatrixToImageWriter.writeToFile(byteMatrix,"gif", file);//将矩阵文件转换成图片文件
            }catch(Exception e) { 
                e.printStackTrace();
            }
        }
        
        /*
         * 解码：
         * 1 将图片反解码为二维矩阵
         * 2 将该二维矩阵解码为内容
         * */
        publicvoid decode(String imgPath) { 
            try{ 
                Reader reader = newMultiFormatReader(); 
//                String imgPath = "D:/Qr_pics/test7.png";//获取即将被解码图片的路径 
                File file = newFile(imgPath);//获取该图片文件
                BufferedImage image; 
                try{ 
                    image = ImageIO.read(file); 
                    if(image == null) { 
                        System.out.println("Could not decode image");
                    }
                    LuminanceSource source = newBufferedImageLuminanceSource(image); 
                    BinaryBitmap bitmap = newBinaryBitmap(newHybridBinarizer(source)); 
                    Result result; 
                    Hashtable hints = newHashtable();//将图片反解码为二维矩阵
                    hints.put(DecodeHintType.CHARACTER_SET,"UTF-8");
                    result = newMultiFormatReader().decode(bitmap, hints);//将该二维矩阵解码成内容
                    String resultStr = result.getText(); 
                    System.out.println("\n解码结果：\n"+resultStr);
        
                }catch(IOException ioe) { 
                    System.out.println(ioe.toString());
                }catch(ReaderException re) { 
                    System.out.println(re.toString());
                }
    
            }catch(Exception ex) { 
                System.out.println(ex.toString());
            }
        }
        
    }
0 0
如何生成二维码代码详解

1. [代码][Java]代码 跳至 [1] [全屏预览]

1. [代码][Java]代码跳至 [1] [全屏预览]
