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接收二维码JAVA代码 java二维码生成代码( 二 )

IT技术生成


int imgSize = 67 + 12 * (size - 1);
bufImg = new BufferedImage(imgSize, imgSize,
BufferedImage.TYPE_INT_RGB);
Graphics2D gs = bufImg.createGraphics();
// 设置背景颜色
gs.setBackground(Color.WHITE);
gs.clearRect(0, 0, imgSize, imgSize);
// 设定图像颜色 BLACK
gs.setColor(Color.BLACK);
// 设置偏移量，不设置可能导致解析出错
int pixoff = 2;
// 输出内容 二维码
if (contentBytes.length0contentBytes.length800) {
boolean[][] codeOut = qrcodeHandler.calQrcode(contentBytes);
for (int i = 0; icodeOut.length; i++) {
for (int j = 0; jcodeOut.length; j++) {
if (codeOut[j][i]) {
gs.fillRect(j * 3 + pixoff, i * 3 + pixoff, 3, 3);
}
}
}
} else {
throw new Exception("QRCode content bytes length = "
+ contentBytes.length + " not in [0, 800].");
}
gs.dispose();
bufImg.flush();
} catch (Exception e) {
e.printStackTrace();
}
return bufImg;
}
/**
* 解析二维码（QRCode）
* @param imgPath 图片路径
* @return
*/
public String decoderQRCode(String imgPath) {
// QRCode 二维码图片的文件
File imageFile = new File(imgPath);
BufferedImage bufImg = null;
String content = null;
try {
bufImg = ImageIO.read(imageFile);
QRCodeDecoder decoder = new QRCodeDecoder();
content = new String(decoder.decode(new TwoDimensionCodeImage(bufImg)), "utf-8");
} catch (IOException e) {
System.out.println("Error: " + e.getMessage());
e.printStackTrace();
} catch (DecodingFailedException dfe) {
System.out.println("Error: " + dfe.getMessage());
dfe.printStackTrace();
}
return content;
}
/**
* 解析二维码（QRCode）
* @param input 输入流
* @return
*/
public String decoderQRCode(InputStream input) {
BufferedImage bufImg = null;
String content = null;
try {
bufImg = ImageIO.read(input);
QRCodeDecoder decoder = new QRCodeDecoder();
content = new String(decoder.decode(new TwoDimensionCodeImage(bufImg)), "utf-8");
} catch (IOException e) {
System.out.println("Error: " + e.getMessage());
e.printStackTrace();
} catch (DecodingFailedException dfe) {
System.out.println("Error: " + dfe.getMessage());
dfe.printStackTrace();
}
return content;
}
public static void main(String[] args) {
String imgPath = "G:/TDDOWNLOAD/Michael_QRCode.png";
String encoderContent = "Hello 大大、小小,welcome to QRCode!" + "\nMyblog []" + "\nEMail [ sjsky007@gmail.com ]";
TwoDimensionCode handler = new TwoDimensionCode();
handler.encoderQRCode(encoderContent, imgPath, "png");
//try {
//OutputStream output = new FileOutputStream(imgPath);
//handler.encoderQRCode(content, output);
//} catch (Exception e) {
//e.printStackTrace();
//}
System.out.println("========encoder success");

String decoderContent = handler.decoderQRCode(imgPath);
System.out.println("解析结果如下：");
System.out.println(decoderContent);
System.out.println("========decoder success!!!");
}
}
第二个代码：
import java.awt.image.BufferedImage;
import jp.sourceforge.qrcode.data.QRCodeImage;
public class TwoDimensionCodeImage implements QRCodeImage {
BufferedImage bufImg;
public TwoDimensionCodeImage(BufferedImage bufImg) {
this.bufImg = bufImg;
}
@Override
public int getHeight() {
return bufImg.getHeight();
}
@Override
public int getPixel(int x, int y) {
return bufImg.getRGB(x, y);
}
@Override
public int getWidth() {
return bufImg.getWidth();
}
}
求java web项目使用html5调用手机摄像头扫描二维码并获取二维码信息代码需要加载cordova.js 方法接收二维码JAVA代码： document.addEventListener("deviceready", onDeviceReady, false); function onDeviceReady() { pictureSource = navigator.camera.PictureSourceType; destinationType = navigator.camera.DestinationType; } //相...

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