/**        *         */        package com.spg.test;                /**        * 项目名称：weixinpay        *         * @description:二维码生成<br>        * 注意生成二维码和解析过程中的编码必须为GBK，否则解析过程会出错。        *         * @author spg        *         * @create_time：2014年5月20日 上午11:26:27        *         * @version V1.0.0        *         */        import java.awt.Color;        import java.awt.Graphics2D;        import java.awt.Image;        import java.awt.geom.AffineTransform;        import java.awt.image.AffineTransformOp;        import java.awt.image.BufferedImage;        import java.io.File;        import java.io.FileOutputStream;        import java.io.IOException;        import java.util.HashMap;        import java.util.Map;                import javax.imageio.ImageIO;                import com.google.zxing.BarcodeFormat;        import com.google.zxing.BinaryBitmap;        import com.google.zxing.DecodeHintType;        import com.google.zxing.EncodeHintType;        import com.google.zxing.LuminanceSource;        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.client.j2se.MatrixToImageWriter;        import com.google.zxing.common.BitMatrix;        import com.google.zxing.common.HybridBinarizer;        import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;                public class QRCodeUtil        {                    /**            * 二维码宽高度默认200            */            private static final int DEFAULT_IMAGE_WIDTH = 300;            private static final int DEFAULT_IMAGE_HEIGHT = 300;                        /**            * 生成带图片二维码时内部图片大小            */            private static final int INNER_IMAGE_WIDTH = 60;            private static final int INNER_IMAGE_HEIGHT = 60;            private static final int IMAGE_HALF_WIDTH = INNER_IMAGE_WIDTH / 2;            private static final int FRAME_WIDTH = 2;                    /**            * 生成普通二维码            *             * @param contents 内容            * @param width 二维码宽度，如果小于0，则按默认大小生成            * @param height 二维码高度，如果小于0，则按默认大小生成            * @param imgPath 生成后的文件完整存放路径，包含文件名。形如D:\aa.jpg            */            public static void encodePR(String contents, int width, int height,                    String imgPath)            {                Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();                // 指定纠错等级                hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);                // 指定编码格式                hints.put(EncodeHintType.CHARACTER_SET, "GBK");                if (width <= 0 || height <= 0)                {                    width = DEFAULT_IMAGE_WIDTH;                    height = DEFAULT_IMAGE_HEIGHT;                }                try                {                    BitMatrix bitMatrix = new MultiFormatWriter().encode(contents,                            BarcodeFormat.QR_CODE, width, height, hints);                    MatrixToImageWriter.writeToStream(bitMatrix, "jpg",                            new FileOutputStream(imgPath));                } catch (Exception e)                {                    e.printStackTrace();                }            }                    /**            * 生成带图片的二维码            *             * @param content            * @param width            * @param height            * @param srcImagePath            * @param destImagePath            */            public static void encodePR(String content, int width, int height,                    String srcImagePath, String destImagePath)            {                try                {                    ImageIO.write(genBarcode(content, width, height, srcImagePath),                            "jpg", new File(destImagePath));                } catch (IOException e)                {                    e.printStackTrace();                } catch (WriterException e)                {                    e.printStackTrace();                }            }                    /**            * 针对二维码进行解析            *             * @param imgPath 二维码文件路径            * @return            */            public static String decodePR(String imgPath)            {                BufferedImage image = null;                Result result = null;                try                {                    image = ImageIO.read(new File(imgPath));                    if (image == null)                    {                        throw new RuntimeException("the decode image may be not exists.");                    }                    LuminanceSource source = new BufferedImageLuminanceSource(image);                    BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));                            Map<DecodeHintType, Object> hints = new HashMap<DecodeHintType, Object>();                    hints.put(DecodeHintType.CHARACTER_SET, "GBK");                            result = new MultiFormatReader().decode(bitmap, hints);                    return result.getText();                        } catch (Exception e)                {                    e.printStackTrace();                }                return null;            }                    /**            * 创建条形码            *             * @param contents            * @param width            * @param height            * @param imgPath            */            public static void encodeBar(String contents, int width, int height,                    String imgPath)            {                // 条形码的最小宽度                int codeWidth = 98;                codeWidth = Math.max(codeWidth, width);                try                {                    BitMatrix bitMatrix = new MultiFormatWriter().encode(contents,                            BarcodeFormat.EAN_13, codeWidth, height, null);                            MatrixToImageWriter.writeToStream(bitMatrix, "png",                            new FileOutputStream(imgPath));                        } catch (Exception e)                {                    e.printStackTrace();                }            }                    /**            * 针对条形码进行解析            *             * @param imgPath            * @return            */            public static String decodeBar(String imgPath)            {                BufferedImage image = null;                Result result = null;                try                {                    image = ImageIO.read(new File(imgPath));                    if (image == null)                    {                        System.out.println("the decode image may be not exit.");                    }                    LuminanceSource source = new BufferedImageLuminanceSource(image);                    BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));                            result = new MultiFormatReader().decode(bitmap, null);                    return result.getText();                } catch (Exception e)                {                    e.printStackTrace();                }                return null;            }                    /**            * 把传入的原始图像按高度和宽度进行缩放，生成符合要求的图标            *             * @param srcImageFile            *            源文件地址            * @param height            *            目标高度            * @param width            *            目标宽度            * @param hasFiller            *            比例不对时是否需要补白：true为补白; false为不补白;            * @throws IOException            */            private static BufferedImage scale(String srcImageFile, int height,                    int width, boolean hasFiller) throws IOException            {                double ratio = 0.0; // 缩放比例                File file = new File(srcImageFile);                BufferedImage srcImage = ImageIO.read(file);                Image destImage = srcImage.getScaledInstance(width, height,                        BufferedImage.SCALE_SMOOTH);                // 计算比例                if ((srcImage.getHeight() > height) || (srcImage.getWidth() > width))                {                    if (srcImage.getHeight() > srcImage.getWidth())                    {                        ratio = (new Integer(height)).doubleValue()                                / srcImage.getHeight();                    } else                    {                        ratio = (new Integer(width)).doubleValue()                                / srcImage.getWidth();                    }                    AffineTransformOp op = new AffineTransformOp(                            AffineTransform.getScaleInstance(ratio, ratio), null);                    destImage = op.filter(srcImage, null);                }                if (hasFiller)                {// 补白                    BufferedImage image = new BufferedImage(width, height,                            BufferedImage.TYPE_INT_RGB);                    Graphics2D graphic = image.createGraphics();                    graphic.setColor(Color.white);                    graphic.fillRect(0, 0, width, height);                    if (width == destImage.getWidth(null))                        graphic.drawImage(destImage, 0,                                (height - destImage.getHeight(null)) / 2,                                destImage.getWidth(null), destImage.getHeight(null),                                Color.white, null);                    else                        graphic.drawImage(destImage,                                (width - destImage.getWidth(null)) / 2, 0,                                destImage.getWidth(null), destImage.getHeight(null),                                Color.white, null);                    graphic.dispose();                    destImage = image;                }                return (BufferedImage) destImage;            }                    /**            * 产生带有图片的二维码缓冲图像            *             * @param content            * @param width            * @param height            * @param srcImagePath            * @return            * @throws WriterException            * @throws IOException            */            private static BufferedImage genBarcode(String content, int width,                    int height, String srcImagePath) throws WriterException,                    IOException            {                // 读取源图像                BufferedImage scaleImage = scale(srcImagePath, INNER_IMAGE_WIDTH,                        INNER_IMAGE_HEIGHT, true);                int[][] srcPixels = new int[INNER_IMAGE_WIDTH][INNER_IMAGE_HEIGHT];                for (int i = 0; i < scaleImage.getWidth(); i++)                {                    for (int j = 0; j < scaleImage.getHeight(); j++)                    {                        srcPixels[i][j] = scaleImage.getRGB(i, j);                    }                }                        Map<EncodeHintType, Object> hint = new HashMap<EncodeHintType, Object>();                hint.put(EncodeHintType.CHARACTER_SET, "GBK");                hint.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);                // 生成二维码                MultiFormatWriter mutiWriter = new MultiFormatWriter();                BitMatrix matrix = mutiWriter.encode(content, BarcodeFormat.QR_CODE,                        width, height, hint);                        // 二维矩阵转为一维像素数组                int halfW = matrix.getWidth() / 2;                int halfH = matrix.getHeight() / 2;                int[] pixels = new int[width * height];                        for (int y = 0; y < matrix.getHeight(); y++)                {                    for (int x = 0; x < matrix.getWidth(); x++)                    {                        // 读取图片                        if (x > halfW - IMAGE_HALF_WIDTH                                && x < halfW + IMAGE_HALF_WIDTH                                && y > halfH - IMAGE_HALF_WIDTH                                && y < halfH + IMAGE_HALF_WIDTH)                        {                            pixels[y * width + x] = srcPixels[x - halfW                                    + IMAGE_HALF_WIDTH][y - halfH + IMAGE_HALF_WIDTH];                        }                        // 在图片四周形成边框                        else if ((x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH                                && x < halfW - IMAGE_HALF_WIDTH + FRAME_WIDTH                                && y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH                                + IMAGE_HALF_WIDTH + FRAME_WIDTH)                                || (x > halfW + IMAGE_HALF_WIDTH - FRAME_WIDTH                                        && x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH                                        && y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH                                        + IMAGE_HALF_WIDTH + FRAME_WIDTH)                                || (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH                                        && x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH                                        && y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH                                        - IMAGE_HALF_WIDTH + FRAME_WIDTH)                                || (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH                                        && x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH                                        && y > halfH + IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH                                        + IMAGE_HALF_WIDTH + FRAME_WIDTH))                        {                            pixels[y * width + x] = 0xfffffff;                        } else                        {                            // 此处可以修改二维码的颜色，可以分别制定二维码和背景的颜色；                            pixels[y * width + x] = matrix.get(x, y) ? 0xff000000                                    : 0xfffffff;                        }                    }                }                        BufferedImage image = new BufferedImage(width, height,                        BufferedImage.TYPE_INT_RGB);                image.getRaster().setDataElements(0, 0, width, height, pixels);                        return image;            }                    public static void main(String[] args)            {                String imgPath = "d:/pr1.jpg";                String contents = "你好,李四! welcome to zxing!"                        + "\n李四的博客[http://my.oschina.net/cloudcoder]"                        + "\nEmail[xxx@163.com]";                // 普通二维码的生成与解析                QRCodeUtil.encodePR(contents, 0, 10, imgPath);                System.out.println("生成二维码成功");                System.out.println(QRCodeUtil.decodePR(imgPath));                         // 带图片的二维的生成与解析                 imgPath = "d:/pr2.png";                 String srcPath = "d:/src.jpg";                 QRCodeUtil.encodePR(contents, 300, 300, srcPath, imgPath);                 System.out.println("生成带图片的二维码成功");                 System.out.println(QRCodeUtil.decodePR(imgPath));                                 // 条形码的生成与解析                 imgPath = "d:/bar.png";                 QRCodeUtil.encodeBar("6923450657713", 105, 50, imgPath);                 System.out.println("生成条形码成功");                 System.out.println(QRCodeUtil.decodeBar(imgPath));            }        }  

注意：如果使用JDK1.7版本，jar包的maven库为：

    <dependency>                   <groupId>com.google.zxing</groupId>                   <artifactId>javase</artifactId>                   <version>3.0.1</version>               </dependency>  

但是如果使用JDK1.6一下版本编译，用以上jar包会报错，改用2.2版本jar包可解决。

zxing2.2.jar下载地址：http://download.csdn.net/detail/fengspg/7378425