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.File;import java.io.OutputStream;import java.util.Hashtable;import javax.imageio.ImageIO;import org.apache.log4j.Logger;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.common.BitMatrix;import com.google.zxing.common.HybridBinarizer;import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;/** * 二维码工具类 * @author  * @date 2016年7月13日 上午9:55:18 */public class QRCodeUtil {private static final Logger LOGGER = Logger.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 = 300;// LOGO宽度private static final int WIDTH = 60;// LOGO高度private static final int HEIGHT = 60;public static void main(String[] args) throws Exception {String text = "http://www.baidu.com";String fileName=QRCodeUtil.encode(text, "F:/QR/");System.out.println("fileName:"+fileName);}private static BufferedImage createImage(String content, String imgPath,boolean needCompress) throws Exception {Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);hints.put(EncodeHintType.CHARACTER_SET, CHARSET);hints.put(EncodeHintType.MARGIN, 1);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QRCodeUtil.insertImage(image, imgPath, needCompress);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 {File file = new File(imgPath);if (!file.exists()) {LOGGER.info("" + imgPath + "   该文件不存在！");return;}Image src = ImageIO.read(new File(imgPath));int width = src.getWidth(null);int height = src.getHeight(null);if (needCompress) { // 压缩LOGOif (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LOGOGraphics2D 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 * @return 文件名 */public static String encode(String content, String imgPath, String destPath,boolean needCompress) throws Exception {BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress);mkdirs(destPath);String file = UUIDUtil.createUUID() + ".jpg";ImageIO.write(image, FORMAT_NAME, new File(destPath + "/" + file));return file;}/** * 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) * @param destPath 存放目录 */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 * @return 文件名 */public static String encode(String content, String destPath) {String fileName = null;try {fileName = QRCodeUtil.encode(content, null, destPath, false);} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}return fileName;}/** * 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));}}