二维码Encode Decode Demo

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本帖演示代码由[email protected]原创，转载请注明出处，谢谢。

1. 二维码第三方包下载地址，该第三方包由日本QRCode开源组织提供：
http://pan.baidu.com/s/1gdrHcrh

2. 演示代码下载地址（作者原创）：
http://pan.baidu.com/s/1jGGD2q6



3 源代码清单说明：
解码器：输入二维码图像数据，或者包含二维码图像数据的InputStream，输出解析好的字符数据。
EnhancedQRCodeDecoder.java
编码器：输入字符串，编码成二维码图像数据，可以根据自己的喜好保存成任意图片格式。
QRCodeEncoder.java
实现第三方接口标准的默认二维码图像类。
QRCodeImageDefult.java
编码解码演示。
QRCodeDemo.java
一个图形化界面，可以调整各自参数的二维码演示，考虑到内容较多，读者可以点击上方的下载地址，自行下载运行。内含源代码zip包。
qrcodeDemo.jar
QRCodeUI.java

4.部分源代码明细
EnhancedQRCodeDecoder.java

package home.ibm.tony.qrcode;

import java.io.IOException;
import java.io.InputStream;
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 EnhancedQRCodeDecoder extends QRCodeDecoder {

	public byte[] decode(InputStream input) throws DecodingFailedException,
			IOException {
		QRCodeImageDefult image = new QRCodeImageDefult(ImageIO.read(input));
		return super.decode(image);
	}

	public String decodeToString(QRCodeImage qrCodeImage)
			throws DecodingFailedException, UnsupportedEncodingException {
		return new String(super.decode(qrCodeImage), "utf-8");

	}

	public String decodeToString(InputStream input) throws DecodingFailedException, IOException {
		return new String(decode(input));
	}
}

QRCodeEncoder.java

package home.ibm.tony.qrcode;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.UnsupportedEncodingException;

import com.swetake.util.Qrcode;

public class QRCodeEncoder {

	private Color bgColor;
	private Qrcode configure;
	private Color fgColor;
	private int margin;
	private int pixelSize;
 


	public QRCodeEncoder() {
		setDefault();
		bgColor = Color.WHITE;
		fgColor = Color.BLACK;
		pixelSize = 5;
		margin = 2;
	}

	public BufferedImage encode(String content) throws UnsupportedEncodingException {

		if(content == null || content.length() == 0 || content.length() > 256)
		{
			content = "http://ieqq.iteye.com/blog/2114077";
		}
		byte[] bstr = content.getBytes("UTF-8");
		boolean[][] result = new boolean[0][0];
		result = configure.calQrcode(bstr);
		int imageSize = result.length * pixelSize + margin * 2;

		BufferedImage bi = new BufferedImage(imageSize, imageSize,
				BufferedImage.TYPE_INT_RGB);
		Graphics2D g = bi.createGraphics();
		g.setBackground(bgColor); // 背景颜色
		g.clearRect(0, 0, imageSize, imageSize);
		g.setColor(fgColor); // 条码颜色

		for (int i = 0; i < result.length; i++) {
			for (int j = 0; j < result.length; j++) {
				if (result[j][i]) {
					g.fillRect(j * pixelSize + margin, i * pixelSize + margin,
							pixelSize, pixelSize);
				}
			}
		}

		g.dispose();
		bi.flush();

		return bi;

	}

	public Color getBgColor() {
		return bgColor;
	}

	public Qrcode getConfigure() {
		return configure;
	}

	public char getErrorCorrect() {
		return configure.getQrcodeErrorCorrect();
	}

	public Color getFgColor() {
		return fgColor;
	}

	public int getMargin() {
		return margin;
	}

	public int getPixelSize() {
		return pixelSize;
	}

	public int getVersion() {
		return configure.getQrcodeVersion();
	}

	public void setBgColor(Color bgColor) {
		this.bgColor = bgColor;
	}

	public void setConfigure(Qrcode configure) {
		this.configure = configure;
	}

	protected void setDefault() {
		configure = new Qrcode();
		// 设置二维码排错率，可选L(7%)、M(15%)、Q(25%)、H(30%)，排错率越高可存储的信息越少，但对二维码清晰度的要求越小
		configure.setQrcodeErrorCorrect('M');
		configure.setQrcodeEncodeMode('B');
		// 设置设置二维码版本号，取值范围1-40，值越大尺寸越大，可存储的信息越大
		configure.setQrcodeVersion(3);
	}

	public void setErrorCorrect(char errorCorrect) {
		this.configure.setQrcodeErrorCorrect(errorCorrect);
	}

	public void setFgColor(Color fgColor) {
		this.fgColor = fgColor;
	}

	public void setMargin(int margin) {
		this.margin = margin;
	}

	public void setPixelSize(int pixelSize) {
		this.pixelSize = pixelSize;
	}

	public void setVersion(int version) {
		this.configure.setQrcodeVersion(version);
	}

}

QRCodeImageDefult.java

package home.ibm.tony.qrcode;

import java.awt.image.BufferedImage;

import jp.sourceforge.qrcode.data.QRCodeImage;

public class QRCodeImageDefult implements QRCodeImage {

	private BufferedImage image;

	public QRCodeImageDefult() {
	}

	public QRCodeImageDefult(BufferedImage image) {
		this.image = image;
	}
	
	public int getHeight() {
		return image.getHeight();
	}

	public BufferedImage getImage() {
		return image;
	}
	 
	public int getPixel(int x, int y) {
		   return image.getRGB(x, y);  
	}
	 
	public int getWidth() {
		 
		return image.getWidth();
	}
	 
	public void setImage(BufferedImage image) {
		this.image = image;
	}

}

QRCodeDemo.java

package home.ibm.tony.qrcode.test;

import home.ibm.tony.qrcode.EnhancedQRCodeDecoder;
import home.ibm.tony.qrcode.QRCodeEncoder;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

import javax.imageio.ImageIO;

public class QRCodeDemo {

	public static void main(String[] args) throws IOException {
		String imgPath = "c:/z.png";
		String encoderContent = "http://ieqq.iteye.com/";

		QRCodeEncoder encoder = new QRCodeEncoder();

		ImageIO.write(encoder.encode(encoderContent), "png", new File(imgPath));

		System.out.println("done!");

		EnhancedQRCodeDecoder decoder = new EnhancedQRCodeDecoder();
		String decoderContent = decoder.decodeToString(new FileInputStream(
				new File(imgPath)));
		System.out.println("解析结果如下：");
		System.out.println(decoderContent);
	 
	}
}

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