Java使用zpxing.jar生成帶url的二維碼

jopen 10年前發布 | 112K 次閱讀二維碼 Java開發

第一步下載zpxing.jar包，并加載進來（網上有很多類似的jar包，這里小編使用的是谷歌提供的jar）

二維碼工具類：

    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;  

    /** 
     * 二維碼工具類 
     *  
     */  
    public class QRCodeUtil {  

        private static final String CHARSET = "utf-8";  
        private static final String FORMAT_NAME = "JPG";  
        // 二維碼尺寸  
        private static final int QRCODE_SIZE = 300;  
        // LOGO寬度  
        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;  
            }  
            // 插入圖片  
            QRCodeUtil.insertImage(image, imgPath, needCompress);  
            return image;  
        }  

        /** 
         * 插入LOGO 
         *  
         * @param source 
         *            二維碼圖片 
         * @param imgPath 
         *            LOGO圖片地址 
         * @param needCompress 
         *            是否壓縮 
         * @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+"   該文件不存在！");  
                return;  
            }  
            Image src = ImageIO.read(new File(imgPath));  
            int width = src.getWidth(null);  
            int height = src.getHeight(null);  
            if (needCompress) { // 壓縮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); // 繪制縮小后的圖  
                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();  
        }  

        /** 
         * 生成二維碼(內嵌LOGO) 
         *  
         * @param content 
         *            內容 
         * @param imgPath 
         *            LOGO地址 
         * @param destPath 
         *            存放目錄 
         * @param needCompress 
         *            是否壓縮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));  
        }  

        /** 
         * 當文件夾不存在時，mkdirs會自動創建多層目錄，區別于mkdir．(mkdir如果父目錄不存在則會拋出異常) 
         * @author lanyuan 
         * Email: mmm333zzz520@163.com 
         * @date 2013-12-11 上午10:16:36 
         * @param destPath 存放目錄 
         */  
        public static void mkdirs(String destPath) {  
            File file =new File(destPath);      
            //當文件夾不存在時，mkdirs會自動創建多層目錄，區別于mkdir．(mkdir如果父目錄不存在則會拋出異常)  
            if (!file.exists() && !file.isDirectory()) {  
                file.mkdirs();  
            }  
        }  

        /** 
         * 生成二維碼(內嵌LOGO) 
         *  
         * @param content 
         *            內容 
         * @param imgPath 
         *            LOGO地址 
         * @param destPath 
         *            存儲地址 
         * @throws Exception 
         */  
        public static void encode(String content, String imgPath, String destPath)  
                throws Exception {  
            QRCodeUtil.encode(content, imgPath, destPath, true);  
        }  

        /** 
         * 生成二維碼 
         *  
         * @param content 
         *            內容 
         * @param destPath 
         *            存儲地址 
         * @param needCompress 
         *            是否壓縮LOGO 
         * @throws Exception 
         */  
        public static void encode(String content, String destPath,  
                boolean needCompress) throws Exception {  
            QRCodeUtil.encode(content, null, destPath, needCompress);  
        }  

        /** 
         * 生成二維碼 
         *  
         * @param content 
         *            內容 
         * @param destPath 
         *            存儲地址 
         * @throws Exception 
         */  
        public static void encode(String content, String destPath) throws Exception {  
            QRCodeUtil.encode(content, null, destPath, false);  
        }  

        /** 
         * 生成二維碼(內嵌LOGO) 
         *  
         * @param content 
         *            內容 
         * @param imgPath 
         *            LOGO地址 
         * @param output 
         *            輸出流 
         * @param needCompress 
         *            是否壓縮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);  
        }  

        /** 
         * 生成二維碼 
         *  
         * @param content 
         *            內容 
         * @param output 
         *            輸出流 
         * @throws Exception 
         */  
        public static void encode(String content, OutputStream output)  
                throws Exception {  
            QRCodeUtil.encode(content, null, output, false);  
        }  

        /** 
         * 解析二維碼 
         *  
         * @param file 
         *            二維碼圖片 
         * @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;  
        }  

        /** 
         * 解析二維碼 
         *  
         * @param path 
         * 二維碼圖片地址 
         * @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);  
        }  
    }

2、BufferedImageLuminanceSource類：

    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);  
        }  
    }

這個是設置掃描以后要跳轉的url :String text = "http://www.thinkphp.cn/extend/295.html";讀者可以自行設置，也可以帶參數

小編測試過了，生成的二維碼可用，會跳轉

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

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二維碼 Java開發

Java使用zpxing.jar生成帶url的二維碼

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