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> 以上内容由PHP站长网【52php.cn】收集整理供大家参考研究 如果以上内容对您有帮助,欢迎收藏、点赞、推荐、分享。 (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |