Java生成二维码可添加logo和文字功能

废话不多说，直接给大家贴代码了，具体代码如下所示：

package com.luo.wctweb.util;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletRequest;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import com.lz.lsf.util.Base64;
/** * @Description: (二维码) * @author：luoguohui * @date：2015-10-29 下午05:27:13 */
public class ZXingCode {
 private static final int QRCOLOR = 0xFF000000; //默认是黑色
 private static final int BGWHITE = 0xFFFFFFFF; //背景颜色
 public static void main(String[] args) throws WriterException  
 {  
  try  
  {  
   getLogoQRCode("https://www.baidu.com/", null, "跳转到百度的二维码");
  }  
  catch (Exception e)  
  {  
   e.printStackTrace();  
  }  
 }  
 /** * 生成带logo的二维码图片 * * @param qrPic * @param logoPic */
 public static String getLogoQRCode(String qrUrl,HttpServletRequest request,String productName)
 {
// String filePath = request.getSession().getServletContext().getRealPath("/") + "resources/images/logoImages/llhlogo.png";
  //filePath是二维码logo的路径，但是实际中我们是放在项目的某个路径下面的，所以路径用上面的，把下面的注释就好
  String filePath = "C:/Users/luoguohui/Desktop/78310a55b319ebc4fa3aef658126cffc1f17168f.jpg"; //TODO  
  String content = qrUrl;
  try
  {  
   ZXingCode zp = new ZXingCode();
   BufferedImage bim = zp.getQR_CODEBufferedImage(content, BarcodeFormat.QR_CODE, 400, 400, zp.getDecodeHintType());
   return zp.addLogo_QRCode(bim, new File(filePath), new LogoConfig(), productName);
  }
  catch (Exception e)
  {
   e.printStackTrace();
  }
  return null;
 }
 /** * 给二维码图片添加Logo * * @param qrPic * @param logoPic */
 public String addLogo_QRCode(BufferedImage bim, File logoPic, LogoConfig logoConfig, String productName)
 {
  try
  {
   /** * 读取二维码图片，并构建绘图对象 */
   BufferedImage image = bim;
   Graphics2D g = image.createGraphics();
   /** * 读取Logo图片 */
   BufferedImage logo = ImageIO.read(logoPic);
   /** * 设置logo的大小,本人设置为二维码图片的20％,因为过大会盖掉二维码 */
   int widthLogo = logo.getWidth(null)>image.getWidth()*3/10?(image.getWidth()*3/10):logo.getWidth(null),  
    heightLogo = logo.getHeight(null)>image.getHeight()*3/10?(image.getHeight()*3/10):logo.getWidth(null);
   /** * logo放在中心 */
   int x = (image.getWidth() - widthLogo) / 2;
   int y = (image.getHeight() - heightLogo) / 2;
   /** * logo放在右下角 * int x = (image.getWidth() - widthLogo); * int y = (image.getHeight() - heightLogo); */
   //开始绘制图片
   g.drawImage(logo, x, y, widthLogo, heightLogo, null);
// g.drawRoundRect(x, y, widthLogo, heightLogo, 15, 15);
// g.setStroke(new BasicStroke(logoConfig.getBorder()));
// g.setColor(logoConfig.getBorderColor());
// g.drawRect(x, y, widthLogo, heightLogo);
   g.dispose();
   //把商品名称添加上去，商品名称不要太长哦，这里最多支持两行。太长就会自动截取啦
   if (productName != null && !productName.equals("")) {
    //新的图片，把带logo的二维码下面加上文字
    BufferedImage outImage = new BufferedImage(400, 445, BufferedImage.TYPE_4BYTE_ABGR);
    Graphics2D outg = outImage.createGraphics();
    //画二维码到新的面板
    outg.drawImage(image, 0, 0, image.getWidth(), image.getHeight(), null);
    //画文字到新的面板
    outg.setColor(Color.BLACK);  
    outg.setFont(new Font("宋体",Font.BOLD,30)); //字体、字型、字号  
    int strWidth = outg.getFontMetrics().stringWidth(productName);
    if (strWidth > 399) {
// //长度过长就截取前面部分
// outg.drawString(productName, 0, image.getHeight() + (outImage.getHeight() - image.getHeight())/2 + 5 ); //画文字
     //长度过长就换行
     String productName1 = productName.substring(0, productName.length()/2);
     String productName2 = productName.substring(productName.length()/2, productName.length());
     int strWidth1 = outg.getFontMetrics().stringWidth(productName1);
     int strWidth2 = outg.getFontMetrics().stringWidth(productName2);
     outg.drawString(productName1, 200 - strWidth1/2, image.getHeight() + (outImage.getHeight() - image.getHeight())/2 + 12 );
     BufferedImage outImage2 = new BufferedImage(400, 485, BufferedImage.TYPE_4BYTE_ABGR);
     Graphics2D outg2 = outImage2.createGraphics();
     outg2.drawImage(outImage, 0, 0, outImage.getWidth(), outImage.getHeight(), null);
     outg2.setColor(Color.BLACK);  
     outg2.setFont(new Font("宋体",Font.BOLD,30)); //字体、字型、字号  
     outg2.drawString(productName2, 200 - strWidth2/2, outImage.getHeight() + (outImage2.getHeight() - outImage.getHeight())/2 + 5 );
     outg2.dispose();  
     outImage2.flush();
     outImage = outImage2;
    }else {
     outg.drawString(productName, 200 - strWidth/2 , image.getHeight() + (outImage.getHeight() - image.getHeight())/2 + 12 ); //画文字  
    }
    outg.dispose();  
    outImage.flush();
    image = outImage;
   }
   logo.flush();
   image.flush();
   ByteArrayOutputStream baos = new ByteArrayOutputStream();
   baos.flush();
   ImageIO.write(image, "png", baos);
   //二维码生成的路径，但是实际项目中，我们是把这生成的二维码显示到界面上的，因此下面的折行代码可以注释掉
   //可以看到这个方法最终返回的是这个二维码的imageBase64字符串
   //前端用 <img src="data:image/png;base64,${imageBase64QRCode}"/> 其中${imageBase64QRCode}对应二维码的imageBase64字符串
   ImageIO.write(image, "png", new File("C:/Users/luoguohui/Desktop/TDC-" + new Date().getTime() + "test.png")); //TODO  
   String imageBase64QRCode = Base64.byteArrayToBase64(baos.toByteArray());
   baos.close();
   return imageBase64QRCode;
  }
  catch (Exception e)
  {
   e.printStackTrace();
  }
  return null;
 }
 /** * 构建初始化二维码 * * @param bm * @return */
 public BufferedImage fileToBufferedImage(BitMatrix bm)
 {
  BufferedImage image = null;
  try
  {
   int w = bm.getWidth(), h = bm.getHeight();
   image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
   for (int x = 0; x < w; x++)
   {
    for (int y = 0; y < h; y++)
    {
     image.setRGB(x, y, bm.get(x, y) ? 0xFF000000 : 0xFFCCDDEE);
    }
   }
  }
  catch (Exception e)
  {
   e.printStackTrace();
  }
  return image;
 }
 /** * 生成二维码bufferedImage图片 * * @param content * 编码内容 * @param barcodeFormat * 编码类型 * @param width * 图片宽度 * @param height * 图片高度 * @param hints * 设置参数 * @return */
 public BufferedImage getQR_CODEBufferedImage(String content, BarcodeFormat barcodeFormat, int width, int height, Map<EncodeHintType, ?> hints)
 {
  MultiFormatWriter multiFormatWriter = null;
  BitMatrix bm = null;
  BufferedImage image = null;
  try
  {
   multiFormatWriter = new MultiFormatWriter();
   // 参数顺序分别为：编码内容，编码类型，生成图片宽度，生成图片高度，设置参数
   bm = multiFormatWriter.encode(content, barcodeFormat, width, height, hints);
   int w = bm.getWidth();
   int h = bm.getHeight();
   image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
   // 开始利用二维码数据创建Bitmap图片，分别设为黑（0xFFFFFFFF）白（0xFF000000）两色
   for (int x = 0; x < w; x++)
   {
    for (int y = 0; y < h; y++)
    {
     image.setRGB(x, y, bm.get(x, y) ? QRCOLOR : BGWHITE);
    }
   }
  }
  catch (WriterException e)
  {
   e.printStackTrace();
  }
  return image;
 }
 /** * 设置二维码的格式参数 * * @return */
 public Map<EncodeHintType, Object> getDecodeHintType()
 {
  // 用于设置QR二维码参数
  Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();
  // 设置QR二维码的纠错级别（H为最高级别）具体级别信息
  hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
  // 设置编码方式
  hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
  hints.put(EncodeHintType.MARGIN, 0);
  hints.put(EncodeHintType.MAX_SIZE, 350);
  hints.put(EncodeHintType.MIN_SIZE, 100);
  return hints;
 }
}
 class LogoConfig
 {
  // logo默认边框颜色
  public static final Color DEFAULT_BORDERCOLOR = Color.WHITE;
  // logo默认边框宽度
  public static final int DEFAULT_BORDER = 2;
  // logo大小默认为照片的1/5
  public static final int DEFAULT_LOGOPART = 5;
  private final int border = DEFAULT_BORDER;
  private final Color borderColor;
  private final int logoPart;
  /** * Creates a default config with on color {@link #BLACK} and off color * {@link #WHITE}, generating normal black-on-white barcodes. */
  public LogoConfig()
  {
   this(DEFAULT_BORDERCOLOR, DEFAULT_LOGOPART);
  }
  public LogoConfig(Color borderColor, int logoPart)
  {
   this.borderColor = borderColor;
   this.logoPart = logoPart;
  }
  public Color getBorderColor()
  {
   return borderColor;
  }
  public int getBorder()
  {
   return border;
  }
  public int getLogoPart()
  {
   return logoPart;
  }
 }

以上所述是小编给大家介绍的Java生成二维码可添加logo和文字功能网站的支持！

来源：http://blog.csdn.net/jingyangldp/article/details/55101633