java生成二维码,并且给二维码添加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;

  /**

  * 条形码、二维码

  * @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;//用于设置图案的颜色

  private static final int WHITE = 0xFFFFFFFF; //用于背景色

  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{

  /**

  * 读取二维码图片,并构建绘图对象

  */

  Graphics2D g2 = matrixImage.createGraphics();

  int matrixWidth = matrixImage.getWidth();

  int matrixHeigh = matrixImage.getHeight();

  /**

  * 读取Logo图片

  */

  String path=request.getSession().getServletContext().getRealPath("/images/logo/dzjkklog.png");

  BufferedImage logo = ImageIO.read(new File(path));

  //开始绘制图片

  g2.drawImage(logo,matrixWidth/5*2,matrixHeigh/5*2, matrixWidth/5, matrixHeigh/5, null);//绘制

  BasicStroke stroke = new BasicStroke(5,BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND);

  g2.setStroke(stroke);// 设置笔画对象

  //指定弧度的圆角矩形郑州妇科医院 http://fk.zyfuke.com/

  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);// 绘制圆弧矩形

  //设置logo 有一道灰色边框

  BasicStroke stroke2 = new BasicStroke(1,BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND);

  g2.setStroke(stroke2);// 设置笔画对象

  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);// 绘制圆弧矩形

  g2.dispose();

  matrixImage.flush() ;

  return matrixImage ;

  }

  /**

  * 生成二维码:直接将生成的二维码传输到前台页面

  * @param bcflag

  */

  @RequestMapping(value="createQrCodes",method = RequestMethod.GET)

  public void createQrCodes(@PathVariable String bcflag,String dastid){

  String url="扫二维码出现的内容";

  if(url!=null&&!"".equals(url)){

  ServletOutputStream stream=null;

  try {

  int width=430;

  int height=430;

  stream=response.getOutputStream();

  QRCodeWriter writer=new QRCodeWriter();

  Hashtable hints = new Hashtable();

  hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);

  hints.put(EncodeHintType.CHARACTER_SET, "utf-8");

  hints.put(EncodeHintType.MARGIN, 1);//设置二维码边的空度,非负数

  BitMatrix bitMatrix = new MultiFormatWriter().encode(url,//要编码的内容

  BarcodeFormat.QR_CODE,

  width, //条形码的宽度

  height, //条形码的高度

  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());

  }

  }

  }

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