java生成二維碼，並且給二維碼添加logo

package com.bus.wx.action.code;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Map;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;

import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

import com.bus.plugin.wx.action.WxAction;
import com.bus.wx.util.Limits;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import com.lys.sys.log.Log;

/**
 * 條形碼、二維碼
 * @author hwj
 *
 */
@Scope(value = "prototype")
@Controller("Bar_Qr_Code_Action")
@RequestMapping(value="plug/wx/wwz/{bcflag}/barqrcode")
public class Bar_Qr_Code_Action extends WxAction{
  
	private static final int LogoPart = 4;
	private static final int BLACK = 0xFF000000;//用於設置圖案的顏色  
    private static final int WHITE = 0xFFFFFFFF; //用於背景色  
    String format = "png";
    


public static BufferedImage toBufferedImage(BitMatrix matrix) {  
    int width = matrix.getWidth();  
    int height = matrix.getHeight();  
    BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);  
    for (int x = 0; x < width; x++) {  
        for (int y = 0; y < height; y++) {  
            image.setRGB(x, y,  (matrix.get(x, y) ? BLACK : WHITE));  
//          image.setRGB(x, y,  (matrix.get(x, y) ? Color.YELLOW.getRGB() : Color.CYAN.getRGB()));  
        }  
    }  
    return image;  
}

	  public BufferedImage LogoMatrix(BufferedImage matrixImage) throws IOException{  
	         /** 
	          * 讀取二維碼圖片，並構建繪圖對象 
	          */  
	         Graphics2D g2 = matrixImage.createGraphics();  
	           
	         int matrixWidth = matrixImage.getWidth();  
	         int matrixHeigh = matrixImage.getHeight();  
	           
	         /** 
	          * 讀取Logo圖片 
	          */  
	         String path=request.getSession().getServletContext().getRealPath("/images/logo/dzjkklog.png");
	         BufferedImage logo = ImageIO.read(new File(path));  
	  
	         //開始繪製圖片  
	         g2.drawImage(logo,matrixWidth/5*2,matrixHeigh/5*2, matrixWidth/5, matrixHeigh/5, null);//繪製       
	         BasicStroke stroke = new BasicStroke(5,BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND);   
	         g2.setStroke(stroke);// 設置筆畫對象  
	         //指定弧度的圓角矩形  
	         RoundRectangle2D.Float round = new RoundRectangle2D.Float(matrixWidth/5*2, matrixHeigh/5*2, matrixWidth/5, matrixHeigh/5,20,20);  
	         g2.setColor(Color.white);  
	         g2.draw(round);// 繪製圓弧矩形  
	           
	         //設置logo 有一道灰色邊框  
	         BasicStroke stroke2 = new BasicStroke(1,BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND);   
	         g2.setStroke(stroke2);// 設置筆畫對象  
	         RoundRectangle2D.Float round2 = new RoundRectangle2D.Float(matrixWidth/5*2+2, matrixHeigh/5*2+2, matrixWidth/5-4, matrixHeigh/5-4,20,20);  
	         g2.setColor(new Color(128,128,128));  
	         g2.draw(round2);// 繪製圓弧矩形  
	           
	         g2.dispose();  
	         matrixImage.flush() ;  
	         return matrixImage ;  
	     }  
	      
	
	/**
	 * 生成二維碼：直接將生成的二維碼傳輸到前臺頁面
	 * @param bcflag
	 */
	@RequestMapping(value="createQrCodes",method = RequestMethod.GET)
	public void createQrCodes(@PathVariable String bcflag,String dastid){
		
		String url="掃二維碼出現的內容";
		if(url!=null&&!"".equals(url)){
			ServletOutputStream stream=null;
			try {
				int width=430;
				int height=430;
				stream=response.getOutputStream();
				QRCodeWriter writer=new QRCodeWriter();
				  Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();  
			       
			        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);  
			        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");     
			        hints.put(EncodeHintType.MARGIN, 1);//設置二維碼邊的空度，非負數  
			        BitMatrix bitMatrix = new MultiFormatWriter().encode(url,//要編碼的內容  
			                BarcodeFormat.QR_CODE,  
			                width, //條形碼的寬度  
			                height, //條形碼的高度  
			                hints);
				//BitMatrix m=writer.encode(url, BarcodeFormat.QR_CODE, height,width);
				 BufferedImage image = toBufferedImage(bitMatrix);  
			     image = LogoMatrix(image);  
			       if (!ImageIO.write(image, format, stream)) {  
			           throw new IOException("Could not write an image of format " + format);  
			       }  
				} catch (Exception e) {
					Log.in.info(e.getMessage());
				}finally{
					if(stream!=null){
						try {
							stream.flush();
							stream.close();
							} catch (IOException e) {
								Log.in.info(e.getMessage());
							}
					}
				}
		 }
	}
	
	

	
	
	
	
	
}