java利用qrcode.jar進行處理二維碼，生成、解析二維碼
阿新 • • 發佈：2019-02-02
首先，這裡貼出jar。
生成二維碼：
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package
test.weima2;
import
java.awt.Color;
import
java.awt.Graphics2D;
import
java.awt.image.BufferedImage; import
java.io.File;
import
javax.imageio.ImageIO;
import
com.swetake.util.Qrcode;
public
class QRCodeEncoderTest {
public
static void
main(String[] args) throws
Exception {
Qrcode qrcode=new
Qrcode();
qrcode.setQrcodeErrorCorrect('M');
qrcode.setQrcodeEncodeMode('B');
qrcode.setQrcodeVersion(7);
String testString =
"我是中國人";
byte[] d =testString.getBytes("GBK");
BufferedImage bi =
new BufferedImage(139,
139, BufferedImage.TYPE_INT_RGB);
// createGraphics
Graphics2D g = bi.createGraphics();
// set background
g.setBackground(Color.WHITE);
g.clearRect(0,
0, 139,
139);
g.setColor(Color.BLACK);
if
(d.length>0
&& d.length <123){
boolean[][] b = qrcode.calQrcode(d);
for
(int
i=0;i<b.length;i++){
for
(int
j=0;j<b.length;j++){
if
(b[j][i]) {
g.fillRect(j*3+2,i*3+2,3,3);
}
}
}
}
g.dispose();
bi.flush();
String FilePath="TestQRCode.png";
File f =
new File(FilePath);
ImageIO.write(bi,
"png", f);
System.out.println("doned!");
}
}
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解析二維碼圖片：
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package
test.weima2;
import
java.awt.image.BufferedImage;
import
java.io.File;
import
java.io.IOException;
import
java.io.UnsupportedEncodingException;
import
javax.imageio.ImageIO;
import
jp.sourceforge.qrcode.QRCodeDecoder;
import
jp.sourceforge.qrcode.data.QRCodeImage;
import
jp.sourceforge.qrcode.exception.DecodingFailedException;
public
class QRCodeDecoderTest {
public
QRCodeDecoderTest() {
}
// ����
public
static void
main(String[] args) {
QRCodeDecoder decoder =
new QRCodeDecoder();
File imageFile =
new File("TestQRCode.png");
BufferedImage image =
null;
try
{
image = ImageIO.read(imageFile);
}
catch (IOException e) {
System.out.println("Error: "+ e.getMessage());
}
try
{
String decodedData =
new String(decoder.decode(new
J2SEImage(image)),"GBK");
System.out.println(decodedData);
}
catch (DecodingFailedException dfe) {
System.out.println("Error: "
+ dfe.getMessage());
}
catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
}
class
J2SEImage implements
QRCodeImage {
BufferedImage image;
public
J2SEImage(BufferedImage image) {
this.image = image;
}
public
int getWidth() {
return
image.getWidth();
}
public
int getHeight() {
return
image.getHeight();
}
public
int getPixel(int
x, int
y) {
return
image.getRGB(x, y);
}
}
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