第一步下载zpxing.jar包，并加载进来（网上有很多类似的jar包，这里小编使用的是谷歌提供的jar）

二维码工具类：

    package com.zpxing.controller;                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 java.util.Random;                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.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        *         */        public class QRCodeUtil {                    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;                    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()) {                    System.err.println(""+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            */            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));            }                    /**            * 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)            * @author lanyuan            * Email: mmm333zzz520@163.com            * @date 2013-12-11 上午10:16:36            * @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            */            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));            }                    public static void main(String[] args) throws Exception {                String text = "http://www.thinkphp.cn/extend/295.html";                QRCodeUtil.encode(text, "C:/Users/Public/Pictures/Sample Pictures/images.jpg", "C:/Users/Public/Pictures/Sample Pictures/", true);            }        }  

    package com.zpxing.controller;                import java.awt.Graphics2D;        import java.awt.geom.AffineTransform;        import java.awt.image.BufferedImage;                import com.google.zxing.LuminanceSource;                public class BufferedImageLuminanceSource extends LuminanceSource {            private final BufferedImage image;            private final int left;            private final int top;                    public BufferedImageLuminanceSource(BufferedImage image) {                this(image, 0, 0, image.getWidth(), image.getHeight());            }                    public BufferedImageLuminanceSource(BufferedImage image, int left,                    int top, int width, int height) {                super(width, height);                        int sourceWidth = image.getWidth();                int sourceHeight = image.getHeight();                if (left + width > sourceWidth || top + height > sourceHeight) {                    throw new IllegalArgumentException(                            "Crop rectangle does not fit within image data.");                }                        for (int y = top; y < top + height; y++) {                    for (int x = left; x < left + width; x++) {                        if ((image.getRGB(x, y) & 0xFF000000) == 0) {                            image.setRGB(x, y, 0xFFFFFFFF); // = white                        }                    }                }                        this.image = new BufferedImage(sourceWidth, sourceHeight,                        BufferedImage.TYPE_BYTE_GRAY);                this.image.getGraphics().drawImage(image, 0, 0, null);                this.left = left;                this.top = top;            }                                public byte[] getRow(int y, byte[] row) {                if (y < 0 || y >= getHeight()) {                    throw new IllegalArgumentException(                            "Requested row is outside the image: " + y);                }                int width = getWidth();                if (row == null || row.length < width) {                    row = new byte[width];                }                image.getRaster().getDataElements(left, top + y, width, 1, row);                return row;            }                                public byte[] getMatrix() {                int width = getWidth();                int height = getHeight();                int area = width * height;                byte[] matrix = new byte[area];                image.getRaster().getDataElements(left, top, width, height, matrix);                return matrix;            }                                public boolean isCropSupported() {                return true;            }                                public LuminanceSource crop(int left, int top, int width, int height) {                return new BufferedImageLuminanceSource(image, this.left + left,                        this.top + top, width, height);            }                                public boolean isRotateSupported() {                return true;            }                                public LuminanceSource rotateCounterClockwise() {                int sourceWidth = image.getWidth();                int sourceHeight = image.getHeight();                AffineTransform transform = new AffineTransform(0.0, -1.0, 1.0,                        0.0, 0.0, sourceWidth);                BufferedImage rotatedImage = new BufferedImage(sourceHeight,                        sourceWidth, BufferedImage.TYPE_BYTE_GRAY);                Graphics2D g = rotatedImage.createGraphics();                g.drawImage(image, transform, null);                g.dispose();                int width = getWidth();                return new BufferedImageLuminanceSource(rotatedImage, top,                        sourceWidth - (left + width), getHeight(), width);            }        }  

小编测试过了，生成的二维码可用，会跳转

来自：http://blog.csdn.net/kenhins/article/details/29592429