[java]代码库
package com.banmacoffee.utils;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import javax.imageio.ImageIO;
import com.swetake.util.Qrcode;
import jp.sourceforge.qrcode.QRCodeDecoder;
import jp.sourceforge.qrcode.data.QRCodeImage;
import jp.sourceforge.qrcode.exception.DecodingFailedException;
public class QRCodeUtils {
/**
* 编码字符串内容到目标File对象中
* @param encodeddata
* @param destFile
* @throws IOException
*/
public static void qrCodeEncode(String encodeddata,File destFile) throws IOException{
Qrcode qrcode = new Qrcode();
qrcode.setQrcodeErrorCorrect('M');
qrcode.setQrcodeEncodeMode('B');
qrcode.setQrcodeVersion(7);
byte[] d = encodeddata.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();
ImageIO.write(bi, "png", destFile);
System.out.println("Input Encoded data is:"+encodeddata);
}
/**
* 解析二维码,返回解析内容
* @param imageFile
* @return
*/
public static String qrCodeDecode(File imageFile) {
String decodedData = null;
QRCodeDecoder decoder = new QRCodeDecoder();
BufferedImage image = null;
try {
image = ImageIO.read(imageFile);
} catch (IOException e) {
System.out.println("Error: " + e.getMessage());
}
try {
decodedData = new String(decoder.decode(new J2SEImage(image)), "GBK");
System.out.println("Output Decoded Data is:"+decodedData);
} catch (DecodingFailedException dfe) {
System.out.println("Error: " + dfe.getMessage());
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return decodedData;
}
public static void main(String[] args) {
String FilePath = "C:\\Demo\\QRCode.png";
File qrFile = new File(FilePath);
//编码
String encodeddata = "{id:10022,name:wandern}";
try {
QRCodeUtils.qrCodeEncode(encodeddata, qrFile);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
};
//解码
String reText = QRCodeUtils.qrCodeDecode(qrFile);
System.out.println(reText);
}
}
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);
}
}//源代码片段来自云代码http://yuncode.net