Java二维码生成与解析

Java二维码生成与解析

=============生成开始================

package com.qiaitao.utils;

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;

/**

 * 二维码生成器

 * @blog http://aitaozhang.iteye.com

 * @author aitaozhang

 */

public class Enqrcode {

	/**

	 * 生成二维码(QRCode)图片

	 * @param content

	 * @param imgPath

	 */

	public void encoderQRCode(String content, String imgPath) {

		try {

			Qrcode qrcodeHandler = new Qrcode();

			qrcodeHandler.setQrcodeErrorCorrect('M');

			qrcodeHandler.setQrcodeEncodeMode('B');

			qrcodeHandler.setQrcodeVersion(8);

			System.out.println(content);

			byte[] contentBytes = content.getBytes("UTF-8");

			BufferedImage bufImg = new BufferedImage(150, 150,

			BufferedImage.TYPE_INT_RGB);

			Graphics2D gs = bufImg.createGraphics();

			gs.setBackground(Color.WHITE);

			gs.clearRect(0, 0, 150, 150);

			// 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.length > 0 && contentBytes.length < 150) {

				boolean[][] codeOut = qrcodeHandler.calQrcode(contentBytes);

				for (int i = 0; i < codeOut.length; i++) {

					for (int j = 0; j < codeOut.length; j++) {

						if (codeOut[j][i]) {

							gs.fillRect(j * 3 + pixoff, i * 3 + pixoff, 3, 3);

						}

					}

				}

			} else {

				System.err.println("QRCode content bytes length = "

				+ contentBytes.length + " not in [ 0,150 ]. ");

			}

			gs.dispose();

			bufImg.flush();

			File imgFile = new File(imgPath);

			// 生成二维码QRCode图片 

			ImageIO.write(bufImg, "png", imgFile);

		} catch (Exception e) {

			e.printStackTrace();

		}

	}

	/**

	 * @param args the command line arguments

	 */

	public static void main(String[] args) {

		String imgPath = "D:/images/Enqrcode.png";

		String content = "Hello Bigbig,Smallsmall,Welcome To 齐爱淘!"

		+ "\nMyblog [ http://aitaozhang.iteye.com ]"

		+ "\nEmail [ [e-mail] ]" + "\nNetWork [ http://www.qiaitao.com ]";

		Enqrcode handler = new Enqrcode();

		handler.encoderQRCode(content, imgPath);

		System.out.println("encoder QRcode success");

	}

}

=============生成结束================
=============解析开始================

package com.qiaitao.utils;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.IOException;

import javax.imageio.ImageIO;

import jp.sourceforge.qrcode.QRCodeDecoder;

import jp.sourceforge.qrcode.data.QRCodeImage;

import jp.sourceforge.qrcode.exception.DecodingFailedException;

/**

 * @blog http://aitaozhang.iteye.com

 * @author aitaozhang

 */

public class Deqrcode {

	/**

	 * 解码二维码

	 * @param imgPath

	 * @return String

	 */

	public String decoderQRCode(String imgPath) {

		// QRCode 二维码图片的文件 

		File imageFile = new File(imgPath);

		BufferedImage bufImg = null;

		String decodedData = null;

		try {

			bufImg = ImageIO.read(imageFile);

			QRCodeDecoder decoder = new QRCodeDecoder();

			decodedData = new String(decoder.decode(new J2SEImage(bufImg)),"UTF-8");

			/* try { 

			 System.out.println(new String(decodedData.getBytes("gb2312"), 

			 "gb2312")); 

			 } catch (Exception e) { 


			 } */

		} catch (IOException e) {

			System.out.println("Error: " + e.getMessage());

			e.printStackTrace();

		} catch (DecodingFailedException dfe) {

			System.out.println("Error: " + dfe.getMessage());

			dfe.printStackTrace();

		}

		return decodedData;

	}

	/**

	 * @param args the command line arguments

	 */

	public static void main(String[] args) {

		Deqrcode handler = new Deqrcode();

		String imgPath = "d:/images/Enqrcode.png";

		String decoderContent = handler.decoderQRCode(imgPath);

		System.out.println("解析结果如下：");

		System.out.println(decoderContent);

		System.out.println("========decoder success!!!");

	}

	class J2SEImage implements QRCodeImage {

		BufferedImage bufImg;

		public J2SEImage(BufferedImage bufImg) {

			this.bufImg = bufImg;

		}

		public int getWidth() {

			return bufImg.getWidth();

		}

		public int getHeight() {

			return bufImg.getHeight();

		}

		public int getPixel(int x, int y) {

			return bufImg.getRGB(x, y);

		}

	}

}

=============解析结束================
所需jar包请下载附件

评论

1 楼 calosteward 2015-01-14  

赞一个。 
谢谢分享了~非常有用。
——————————————————————
free java qrcode image creator
java barcode creator