java生成带logo的二维码

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package com.xxx.xx.x.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 org.apache.commons.codec.binary.Base64;
 
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;
 
 
/**
 * @类描述：(生成带logo的二维码) 
 */
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 {
     /// String filePath = (javax.servlet.http.HttpServletRequest)request.getSession().getServletContext().getRealPath("/") + "resources/images/hylogo.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 outputPath ="C:/Users/admin/Desktop/TDC-" + new Date().getTime() + "test.png";
        String filePath = "C:\\Users\\admin\\Desktop\\hylogo.png"; // TODO
        String comtent = "http://weixin.qq.com/r/MSncxPHEoazerbWn93wj";
        try {
            getLogoQRCode(comtent, "",filePath,outputPath);
        } 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, String productName,String filePath,String outputPath) {
        String content = qrUrl;
        try {
            ZXingCode zp = new ZXingCode();
            BufferedImage bim = zp.getQR_CODEBufferedImage(content, BarcodeFormat.QR_CODE, 150, 150,
                    zp.getDecodeHintType());
            return zp.addLogo_QRCode(bim, new File(filePath), new LogoConfig(), productName,outputPath);
        } 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,String outputPath) {
        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
            File tifjpgFile = new File(outputPath);
            ImageIO.write(image, "png",
                    new File(outputPath)); // TODO
 
            String imageBase64QRCode = Base64.encodeBase64URLSafeString(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;
    }
}

　//外部调用部分

String content = "二维码内容";
String filePath = request.getRealPath("/")+"/resources/images/logo.png";; //logo存放的地址
String outputPath = request.getRealPath("/")+"resources/qrcode/ht"+uuid+".png";//二维码生成以后存放的地址
File dir = new File(outputPath);
 if (dir.exists()) { //判断文件是否存在
        System.out.println("file exists");
    }else {
        ZXingCode.getLogoQRCode(content, "", filePath, outputPath);//生成带logo的二维码图片
    }