package UIB.COM;

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 jp.sourceforge.qrcode.QRCodeDecoder;
import jp.sourceforge.qrcode.data.QRCodeImage;
import jp.sourceforge.qrcode.exception.DecodingFailedException;
import com.swetake.util.Qrcode;

public class QRCodeHandler {

	public static void main(String[] args) throws Exception {
		
		StringBuffer context =new StringBuffer(); 
		context.append("制造商：新余钢铁股份有限公司\n");
		context.append("牌号：").append("50").append("\n");
		context.append("标准号:").append("GB/T710-2008 GB/T699-1999").append("\n");
		context.append("交货状态:").append("AR").append("\n");
		context.append("发货日期：").append("2015-09-19").append("\n");
		context.append("合同号:").append("302015080042").append("\n");
		context.append("证明书编号:").append("XR5-042382").append("\n");
		QRCodeHandler.QRCodeEncoder(context.toString(),"D:\\Program Files\\Tomcat5.5.23\\webapps\\CoreFS\\WEB-INF\\excelConfig\\qr.png");
	}

	/**
	 * 生成二维码
	 * @throws Exception
	 */
	public static void QRCodeEncoder(String context,String path) throws Exception {
		Qrcode qrcode = new Qrcode();
		qrcode.setQrcodeErrorCorrect('M');
		qrcode.setQrcodeEncodeMode('B');
		qrcode.setQrcodeVersion(10);
		
		byte[] d = context.getBytes("gb2312");

		BufferedImage bi = new BufferedImage(180, 180,BufferedImage.TYPE_INT_RGB);

		// createGraphics
		Graphics2D g = bi.createGraphics();

		// set background
		g.setBackground(Color.WHITE);
		g.clearRect(0, 0, 180, 180);

		g.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 
        //System.out.println(d.length);
        if (d.length > 0 && d.length < 214) { 
            boolean[][] codeOut = qrcode.calQrcode(d); 
            for (int i = 0; i < codeOut.length; i++) { 
                for (int j = 0; j < codeOut.length; j++) { 
                    if (codeOut[j][i]) { 
                        g.fillRect(j * 3 + pixoff, i * 3 + pixoff, 3, 3); 
                    } 
                } 
            } 
        } else { 
        	throw new Exception("内容过长,生成二维码失败.请与技术中心联系.");
//            System.err.println("QRCode content bytes length = " 
//                    + d.length + " not in [ 0,214 ]. "); 
        } 

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

		File f = new File(path);

		ImageIO.write(bi, "png", f);
	}
	
	/**
	 * 解析二维码
	 * @throws Exception
	 */
	public static void QRCodeDecoderTest() {

		QRCodeDecoder decoder = new QRCodeDecoder();
		File imageFile = new File("TestQRCode.png");
		BufferedImage image = null;
		try {
			image = ImageIO.read(imageFile);
		} catch (IOException e) {
			System.out.println("Error: " + e.getMessage());
		}
		try {

			String decodedData = new String(
					decoder.decode(new J2SEImage(image)), "GBK");

			System.out.println(decodedData);
		} catch (DecodingFailedException dfe) {
			System.out.println("Error: " + dfe.getMessage());
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		}
	}
}

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);
	}
}