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
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[java] packageorg.lxh; importcom.google.zxing.common.BitMatrix; importjavax.imageio.ImageIO; importjava.io.File; importjava.io.OutputStream; importjava.io.IOException; importjava.awt.image.BufferedImage; publicfinal
class
MatrixToImageWriter { privatestatic
final
int
BLACK = 0xFF000000; privatestatic
final
int
WHITE = 0xFFFFFFFF; privateMatrixToImageWriter()
{} publicstatic
BufferedImage toBufferedImage(BitMatrix matrix) { intwidth
= matrix.getWidth(); intheight
= matrix.getHeight(); BufferedImage
image = newBufferedImage(width,
height, BufferedImage.TYPE_INT_RGB); for(intx
= 0;
x < width; x++) { for(inty
= 0;
y < height; y++) { image.setRGB(x,
y, matrix.get(x, y) ? BLACK : WHITE); } } returnimage; } publicstatic
void
writeToFile(BitMatrix matrix, String format, File file) throwsIOException
{ BufferedImage
image = toBufferedImage(matrix); if(!ImageIO.write(image,
format, file)) { thrownew
IOException("Could
not write an image of format "
+ format + "
to "
+ file); } } publicstatic
void
writeToStream(BitMatrix matrix, String format, OutputStream stream) throwsIOException
{ BufferedImage
image = toBufferedImage(matrix); if(!ImageIO.write(image,
format, stream)) { thrownew
IOException("Could
not write an image of format "
+ format); } } }packageorg.lxh; importcom.google.zxing.common.BitMatrix; importjavax.imageio.ImageIO; importjava.io.File; importjava.io.OutputStream; importjava.io.IOException; importjava.awt.image.BufferedImage; publicfinal
class
MatrixToImageWriter { privatestatic
final
int
BLACK = 0xFF000000; privatestatic
final
int
WHITE = 0xFFFFFFFF; privateMatrixToImageWriter()
{} publicstatic
BufferedImage toBufferedImage(BitMatrix matrix) { intwidth
= matrix.getWidth(); intheight
= matrix.getHeight(); BufferedImage
image = newBufferedImage(width,
height, BufferedImage.TYPE_INT_RGB); for(intx
= 0;
x < width; x++) { for(inty
= 0;
y < height; y++) { image.setRGB(x,
y, matrix.get(x, y) ? BLACK : WHITE); } } returnimage; } publicstatic
void
writeToFile(BitMatrix matrix, String format, File file) throwsIOException
{ BufferedImage
image = toBufferedImage(matrix); if(!ImageIO.write(image,
format, file)) { thrownew
IOException("Could
not write an image of format "
+ format + "
to "
+ file); } } publicstatic
void
writeToStream(BitMatrix matrix, String format, OutputStream stream) throwsIOException
{ BufferedImage
image = toBufferedImage(matrix); if(!ImageIO.write(image,
format, stream)) { thrownew
IOException("Could
not write an image of format "
+ format); } } }4.借助上面的类生成二维码 [java] packageorg.lxh; importjava.io.File; importjava.util.Hashtable; importcom.google.zxing.BarcodeFormat; importcom.google.zxing.EncodeHintType; importcom.google.zxing.MultiFormatWriter; importcom.google.zxing.WriterException; importcom.google.zxing.common.BitMatrix; publicclass
Test { /** *
@param args *
@throws Exception */ publicstatic
void
main(String[] args) throwsException
{ String
text = "http://www.ablanxue.com"; intwidth
= 300; intheight
= 300; //二维码的图片格式 String
format = "gif"; Hashtable
hints = newHashtable(); //内容所使用编码 hints.put(EncodeHintType.CHARACTER_SET,"utf-8"); BitMatrix
bitMatrix = newMultiFormatWriter()。encode(text, BarcodeFormat.QR_CODE,
width, height, hints); //生成二维码 File
outputFile = newFile("d:"+File.separator+"new.gif"); MatrixToImageWriter.writeToFile(bitMatrix,
format, outputFile); } } |
