涉及到的主要類庫:

• 編碼 lib：Qrcode_swetake.jar  （官網介紹 -- http://www.swetake.com/qr/index-e.html）              
• 解碼 lib：qrcode.jar                 （官網介紹 -- http://sourceforge.jp/projects/qrcode/）

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;

/**
 * 二維碼生成器
 */
public class PTIANQRCodeEncoder {

	/**
	 * 生成二維碼(QRCode)圖片
	 * 
	 * @param content
	 * @param imgPath
	 */
	public void encoderQRCode(String content, String imgPath) {
		try {

			Qrcode qrcodeHandler = new Qrcode();
			qrcodeHandler.setQrcodeErrorCorrect('M');
			qrcodeHandler.setQrcodeEncodeMode('B');
			qrcodeHandler.setQrcodeVersion(7);

			System.out.println(content);
			byte[] contentBytes = content.getBytes("gb2312");

			BufferedImage bufImg = new BufferedImage(140, 140,
					BufferedImage.TYPE_INT_RGB);

			Graphics2D gs = bufImg.createGraphics();

			gs.setBackground(Color.WHITE);
			gs.clearRect(0, 0, 140, 140);

			// 設定影象顏色 > BLACK
			gs.setColor(Color.BLACK);

			// 設定偏移量 不設定可能導致解析出錯
			int pixoff = 2;
			// 輸出內容 > 二維碼
			if (contentBytes.length > 0 && contentBytes.length < 120) {
				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 [ 0,120 ]. ");
			}

			gs.dispose();
			bufImg.flush();

			File imgFile = new File(imgPath);

			// 生成二維碼QRCode圖片
			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:/PTIAN_QRCode.png";

		String content = "PTIAN Oracle EBS Repository,你好，世界";

		PTIANQRCodeEncoder handler = new PTIANQRCodeEncoder();
		handler.encoderQRCode(content, imgPath);

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

}
 

生成的圖片：

解析二維碼：

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;


public class PTIANQRCodeDecoderHandler {

    /**
     * 解碼二維碼
     * @param imgPath
     * @return String
     */
    public String decoderQRCode(String imgPath) {

        // QRCode 二維碼圖片的檔案
        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)));

            // try {
            // System.out.println(new String(decodedData.getBytes("gb2312"),
            // "gb2312"));
            // } catch (Exception e) {
            // // TODO: handle exception
            // }
        } 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) {
        PTIANQRCodeDecoderHandler handler = new PTIANQRCodeDecoderHandler();
        String imgPath = "d:/PTIAN_QRCode.png";
        String decoderContent = handler.decoderQRCode(imgPath);
        System.out.println("解析結果如下：");
        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);
        }

    }
}
 

解析結果如下：
PTIAN Oracle EBS Repository,你好，世界
========decoder success!!!

Oracle EBS中如何使用QRCode來列印二維碼，ITPUB上已經有人通過JSP來呼叫QRCode做到了，最終可以在XML報表中列印，詳見帖子：http://www.itpub.net/thread-1755791-1-1.html

未完...