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java生成二维码

发布时间:2020-12-15 00:15:53 所属栏目:Java 来源:网络整理
导读:今天PHP站长网 52php.cn把收集自互联网的代码分享给大家,仅供参考。 /** * */ 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

以下代码由PHP站长网 52php.cn收集自互联网

现在PHP站长网小编把它分享给大家,仅供参考

    /** 
     *  
     */  
    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,String srcImagePath,String destImagePath)  
        {  
            try  
            {  
                ImageIO.write(genBarcode(content,srcImagePath),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,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,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,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,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,BufferedImage.TYPE_INT_RGB);  
                Graphics2D graphic = image.createGraphics();  
                graphic.setColor(Color.white);  
                graphic.fillRect(0,height);  
                if (width == destImage.getWidth(null))  
                    graphic.drawImage(destImage,(height - destImage.getHeight(null)) / 2,destImage.getWidth(null),destImage.getHeight(null),Color.white,null);  
                else  
                    graphic.drawImage(destImage,(width - destImage.getWidth(null)) / 2,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,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,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,BufferedImage.TYPE_INT_RGB);  
            image.getRaster().setDataElements(0,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[[email?protected]]";  
            // 普通二维码的生成与解析  
            QRCodeUtil.encodePR(contents,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,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>  

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