java生成二维码工具类

import java.awt.BasicStroke;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Shape;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.util.Hashtable;
import java.util.Random;

import javax.imageio.ImageIO;

import org.apache.axis.encoding.Base64;
import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.Result;
import com.google.zxing.WriterException;
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;

public class QRCodeUtil {
	private final static Logger logger = LoggerFactory.getLogger(QRCodeUtil.class);
	private static final String CHARSET = "utf-8";
	private static final String FORMAT_NAME = "JPG";
	// 二维码尺寸
	private static final int QRCODE_SIZE = 155;
	// LOGO宽度
	private static final int WIDTH = 5;
	// LOGO高度
	private static final int HEIGHT = 5;

	private static BufferedImage createImage(String content, String imgPath, boolean needCompress)
			throws WriterException {
		Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
		hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
		hints.put(EncodeHintType.CHARACTER_SET, CHARSET);
		hints.put(EncodeHintType.MARGIN, 0);
		BitMatrix bitMatrix;

		bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints);

		int width = bitMatrix.getWidth();
		int height = bitMatrix.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, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
			}
		}
		if (imgPath == null || "".equals(imgPath)) {
			return image;
		}
		// 插入图片
		try {
			QRCodeUtil.insertImage(image, imgPath, needCompress);
		} catch (Exception e) {
			logger.error("二维码插入图片错误", e);
		}
		return image;
	}

	/**
	 * 插入LOGO
	 * 
	 * @param source       二维码图片
	 * @param imgPath      LOGO图片地址
	 * @param needCompress 是否压缩
	 * @throws Exception
	 */
	private static void insertImage(BufferedImage source, String imgPath, boolean needCompress) throws Exception {
		logger.info("imgPath:" + imgPath);
		if (StringUtils.isBlank(imgPath)) {
			return;
		}
		URL url = new URL(imgPath);
		InputStream intstream = url.openStream();
		Image src = ImageIO.read(intstream);
		int width = src.getWidth(null);
		int height = src.getHeight(null);
		if (needCompress) { // 压缩LOGO
			if (width > WIDTH) {
				width = WIDTH;
			}
			if (height > HEIGHT) {
				height = HEIGHT;
			}
			Image image = src.getScaledInstance(width, height, Image.SCALE_SMOOTH);
			BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
			Graphics g = tag.getGraphics();
			g.drawImage(image, 0, 0, null); // 绘制缩小后的图
			g.dispose();
			src = image;
		}
		// 插入LOGO
		Graphics2D graph = source.createGraphics();
		int x = (QRCODE_SIZE - width) / 2;
		int y = (QRCODE_SIZE - height) / 2;
		graph.drawImage(src, x, y, width, height, null);
		Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);
		graph.setStroke(new BasicStroke(3f));
		graph.draw(shape);
		graph.dispose();
	}

	/**
	 * 生成二维码(内嵌LOGO)
	 * 
	 * @param content      内容
	 * @param imgPath      LOGO地址
	 * @param destPath     存放目录
	 * @param needCompress 是否压缩LOGO
	 * @throws Exception
	 */
	public static void encode(String content, String imgPath, String destPath, boolean needCompress) throws Exception {
		BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress);
		mkdirs(destPath);
		String file = new Random().nextInt(99999999) + ".jpg";
		ImageIO.write(image, FORMAT_NAME, new File(destPath + File.separator + file));
	}

	public static String encode(String content, String imgPath, String destPath, String fileName, boolean needCompress)
			throws Exception {
		BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress);
		mkdirs(destPath);
		String file = fileName + ".jpg";
		ImageIO.write(image, FORMAT_NAME, new File(destPath + File.separator + file));
		return file;
	}

	public static String encode(String content, boolean needCompress) throws IOException, WriterException {
		BufferedImage image = QRCodeUtil.createImage(content, null, needCompress);
		ByteArrayOutputStream stream = new ByteArrayOutputStream();
		ImageIO.write(image, "png", stream);
		String base64 = Base64.encode(stream.toByteArray());
		return base64;
	}

	public static void mkdirs(String destPath) {
		File file = new File(destPath);
		// 当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir．(mkdir如果父目录不存在则会抛出异常)
		if (!file.exists() && !file.isDirectory()) {
			file.mkdirs();
		}
	}

	/**
	 * 生成二维码(内嵌LOGO)
	 * 
	 * @param content  内容
	 * @param imgPath  LOGO地址
	 * @param destPath 存储地址
	 * @throws Exception
	 */
	public static void encode(String content, String imgPath, String destPath) throws Exception {
		QRCodeUtil.encode(content, imgPath, destPath, true);
	}

	/**
	 * 生成二维码
	 * 
	 * @param content      内容
	 * @param destPath     存储地址
	 * @param needCompress 是否压缩LOGO
	 * @throws Exception
	 */
	public static void encode(String content, String destPath, boolean needCompress) throws Exception {
		QRCodeUtil.encode(content, null, destPath, needCompress);
	}

	/**
	 * 生成二维码
	 * 
	 * @param content  内容
	 * @param destPath 存储地址
	 * @throws Exception
	 */
	public static void encode(String content, String destPath) throws Exception {
		QRCodeUtil.encode(content, null, destPath, false);
	}

	/**
	 * 生成二维码(内嵌LOGO)
	 * 
	 * @param content      内容
	 * @param imgPath      LOGO地址
	 * @param output       输出流
	 * @param needCompress 是否压缩LOGO
	 * @throws Exception
	 */
	public static void encode(String content, String imgPath, OutputStream output, boolean needCompress)
			throws Exception {
		BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress);
		ImageIO.write(image, FORMAT_NAME, output);
	}

	/**
	 * 生成二维码
	 * 
	 * @param content 内容
	 * @param output  输出流
	 * @throws Exception
	 */
	public static void encode(String content, OutputStream output) throws Exception {
		QRCodeUtil.encode(content, null, output, false);
	}

	/**
	 * 解析二维码
	 * 
	 * @param file 二维码图片
	 * @return
	 * @throws Exception
	 */
	public static String decode(File file) throws Exception {
		BufferedImage image;
		image = ImageIO.read(file);
		if (image == null) {
			return null;
		}
		BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image);
		BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
		Result result;
		Hashtable<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>();
		hints.put(DecodeHintType.CHARACTER_SET, CHARSET);
		result = new MultiFormatReader().decode(bitmap, hints);
		String resultStr = result.getText();
		return resultStr;
	}

	/**
	 * 解析二维码
	 * 
	 * @param path 二维码图片地址
	 * @return
	 * @throws Exception
	 */
	public static String decode(String path) throws Exception {
		return QRCodeUtil.decode(new File(path));
	}

}