废话不多说，直接给大家贴代码了，具体代码如下所示：
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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，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持！
原文链接：http://blog.csdn.net/jingyangldp/article/details/55101633
