二维码工具类

来源：互联网发布：手机克隆软件编辑：程序博客网时间：2024/06/05 14:19

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

 * 需要引入zxing包 * @author  shu * @date 2017年2月26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, "D:/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     * @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 block            e.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));    }}

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