2.先下载zxing开发包,这里用到的只是core那个jar包
3.使用zxing开发还需要一个类,代码如下
2. [代码][Java]代码
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
99
100
101
102
103
104
105
106
107
108
|
[java] package org.lxh; import com.google.zxing.common.BitMatrix; import javax.imageio.ImageIO; import java.io.File; import java.io.OutputStream; import java.io.IOException; import java.awt.image.BufferedImage; public final
class
MatrixToImageWriter { private static
final
int
BLACK = 0xFF000000 ; private static
final
int
WHITE = 0xFFFFFFFF ; private MatrixToImageWriter()
{} public static
BufferedImage toBufferedImage(BitMatrix matrix) { int width
= matrix.getWidth(); int height
= matrix.getHeight(); BufferedImage
image = new BufferedImage(width,
height, BufferedImage.TYPE_INT_RGB); for ( int x
= 0 ;
x < width; x++) { for ( int y
= 0 ;
y < height; y++) { image.setRGB(x,
y, matrix.get(x, y) ? BLACK : WHITE); } } return image; } public static
void
writeToFile(BitMatrix matrix, String format, File file) throws IOException
{ BufferedImage
image = toBufferedImage(matrix); if (!ImageIO.write(image,
format, file)) { throw new
IOException( "Could
not write an image of format "
+ format + "
to "
+ file); } } public static
void
writeToStream(BitMatrix matrix, String format, OutputStream stream) throws IOException
{ BufferedImage
image = toBufferedImage(matrix); if (!ImageIO.write(image,
format, stream)) { throw new
IOException( "Could
not write an image of format "
+ format); } } } package org.lxh; import com.google.zxing.common.BitMatrix; import javax.imageio.ImageIO; import java.io.File; import java.io.OutputStream; import java.io.IOException; import java.awt.image.BufferedImage; public final
class
MatrixToImageWriter { private static
final
int
BLACK = 0xFF000000 ; private static
final
int
WHITE = 0xFFFFFFFF ; private MatrixToImageWriter()
{} public static
BufferedImage toBufferedImage(BitMatrix matrix) { int width
= matrix.getWidth(); int height
= matrix.getHeight(); BufferedImage
image = new BufferedImage(width,
height, BufferedImage.TYPE_INT_RGB); for ( int x
= 0 ;
x < width; x++) { for ( int y
= 0 ;
y < height; y++) { image.setRGB(x,
y, matrix.get(x, y) ? BLACK : WHITE); } } return image; } public static
void
writeToFile(BitMatrix matrix, String format, File file) throws IOException
{ BufferedImage
image = toBufferedImage(matrix); if (!ImageIO.write(image,
format, file)) { throw new
IOException( "Could
not write an image of format "
+ format + "
to "
+ file); } } public static
void
writeToStream(BitMatrix matrix, String format, OutputStream stream) throws IOException
{ BufferedImage
image = toBufferedImage(matrix); if (!ImageIO.write(image,
format, stream)) { throw new
IOException( "Could
not write an image of format "
+ format); } } } 4 .借助上面的类生成二维码 [java] package org.lxh; import java.io.File; import java.util.Hashtable; import com.google.zxing.BarcodeFormat; import com.google.zxing.EncodeHintType; import com.google.zxing.MultiFormatWriter; import com.google.zxing.WriterException; import com.google.zxing.common.BitMatrix; public class
Test { /** *
@param args *
@throws Exception */ public static
void
main(String[] args) throws Exception
{ String
text = "http://www.ablanxue.com" ; int width
= 300 ; int height
= 300 ; //二维码的图片格式 String
format = "gif" ; Hashtable
hints = new Hashtable(); //内容所使用编码 hints.put(EncodeHintType.CHARACTER_SET, "utf-8" ); BitMatrix
bitMatrix = new MultiFormatWriter()。encode(text, BarcodeFormat.QR_CODE,
width, height, hints); //生成二维码 File
outputFile = new File( "d:" +File.separator+ "new.gif" ); MatrixToImageWriter.writeToFile(bitMatrix,
format, outputFile); } } |