java生成自定义logo的微信二维码

package net.shopxx.util;

import com.google.zxing.*;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;

/**
 * 二维码工具类
 * 
 * @author zh
 *
 */
public class ZXingCodeUtil {

	private static final Logger LOGGER = LoggerFactory.getLogger(ZXingCodeUtil.class);

	private static final int QRCOLOR = 0xFF000000; // 默认是黑色
	private static final int BGWHITE = 0xFFFFFFFF; // 背景颜色

	
	/**
	 * 生成带logo的二维码图片
	 * 
	 * @param qrUrl
	 *            二维码网络图片地址
	 * @param productName
	 *            图片名称
	 * @param logoUrl
	 *            logo图片url
	 * @return
	 */
	public static byte[] getLogoQRCode(String qrUrl, String productName, String logoUrl) {
		try {
			HttpURLConnection connection = (HttpURLConnection) new URL(qrUrl).openConnection();
			connection.setConnectTimeout(30000);
			connection.setReadTimeout(30000);
			connection.connect();
			InputStream input = connection.getInputStream();
			BufferedImage img = ImageIO.read(input);
			String content = ZXingCodeUtil.decode(img);
			ZXingCodeUtil zp = new ZXingCodeUtil();
			BufferedImage bim = zp.getQR_CODEBufferedImage(content, BarcodeFormat.QR_CODE, 400, 400,
					zp.getDecodeHintType());
			return zp.addLogo_QRCode(bim, new URL(logoUrl), new LogoConfig(), productName);
		} catch (Exception e) {
			LOGGER.error("ZXingCodeUtil.getLogoQRCode error:{}", e.toString());
		}
		return null;
	}

	/**
	 * 给二维码图片添加Logo
	 * 
	 * @param bim
	 * @param logoPic
	 * @param logoConfig
	 * @param productName
	 * @return
	 */
	public byte[] addLogo_QRCode(BufferedImage bim, URL 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);

			byte[] bytes = baos.toByteArray();
			baos.close();
			return bytes;
		} catch (Exception e) {
			LOGGER.error("ZXingCodeUtil.addLogo_QRCode error:{}", e.toString());
		}
		return null;
	}

	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) {
			LOGGER.error("ZXingCodeUtil.fileToBufferedImage error:{}", e.toString());
		}
		return image;
	}

	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) {
			LOGGER.error("ZXingCodeUtil.getQR_CODEBufferedImage error:{}", e.toString());
		}
		return image;
	}

	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;
	}

	/**
	 * 解析图像
	 */
	public static String decode(BufferedImage image) {
		try {
			LuminanceSource source = new BufferedImageLuminanceSource(image);
			Binarizer binarizer = new HybridBinarizer(source);
			BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);
			Map<DecodeHintType, Object> hints = new HashMap<DecodeHintType, Object>();
			hints.put(DecodeHintType.CHARACTER_SET, "utf-8");
			hints.put(DecodeHintType.PURE_BARCODE,true);
			Result result = new MultiFormatReader().decode(binaryBitmap, hints);// 对图像进行解码
			LOGGER.info("ZXingCodeUtil.decode result:{}", JsonUtils.toJson(result));
			return result.getText();
		} catch (Exception e) {
			LOGGER.error("ZXingCodeUtil.decode error:{}", e.toString());
		}
		return null;
	}
}