提醒未来的自己:用的时候看好路径修改一下就行 <!-- 生成二维码 --> <dependency> <groupId>com.google.zxing</groupId> <artifactId>core</artifactId> <version>${zxing.version}</version> </dependency> <dependency> <groupId>com.google.zxing</groupId> <artifactId>android-core</artifactId> <version>3.3.0</version> </dependency> <dependency> <groupId>com.google.zxing</groupId> <artifactId>android-integration</artifactId> <version>3.3.0</version> </dependency> <dependency> <groupId>com.google.zxing</groupId> <artifactId>javase</artifactId> <version>${zxing.version}</version> </dependency>
package com.sun.test.QRcode.AddLOGO; public class QrCodeTest { public static void main(String[] args) throws Exception { long start = System.currentTimeMillis(); // 存放在二维码中的内容 String text = "我是小铭么么么么么"; // 嵌入二维码的图片路径 String imgPath = "http://shenghuoplus.oss-cn-shenzhen.aliyuncs.com/菜品图片/779b931afa3f7910bc40b79b2cfb36aa.jpg"; // 生成的二维码的路径及名称 String destPath = "F:/play.png"; //生成二维码 QRCodeUtil.encode(text, imgPath, destPath, true); long generateEnd = System.currentTimeMillis(); System.out.println("生成二维码时间:" + (generateEnd - start)); // 解析二维码 String str = QRCodeUtil.decode(destPath); System.out.println("解析二维码:" + (System.currentTimeMillis() - generateEnd)); // 打印出解析出的内容 System.out.println("打印出解析出的内容:" + str); } }
package com.sun.test.QRcode.AddLOGO; import com.google.zxing.*; import com.google.zxing.client.j2se.BufferedImageLuminanceSource; import com.google.zxing.common.BitMatrix; import com.google.zxing.common.HybridBinarizer; import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel; import javax.imageio.ImageIO; import java.awt.*; import java.awt.geom.RoundRectangle2D; import java.awt.image.BufferedImage; import java.io.*; import java.net.HttpURLConnection; import java.net.URL; import java.util.Hashtable; 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 hints = new Hashtable(); 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; } //new一个URL对象 URL url = new URL("http://shenghuoplus.oss-cn-shenzhen.aliyuncs.com/%E8%8F%9C%E5%93%81%E5%9B%BE%E7%89%87%2F779b931afa3f7910bc40b79b2cfb36aa.jpg"); //打开链接 HttpURLConnection conn = (HttpURLConnection)url.openConnection(); //设置请求方式为"GET" conn.setRequestMethod("GET"); //超时响应时间为5秒 conn.setConnectTimeout(5 * 1000); //通过输入流获取图片数据 InputStream inStream = conn.getInputStream(); //得到图片的二进制数据,以二进制封装得到数据,具有通用性 byte[] data = readInputStream(inStream); //new一个文件对象用来保存图片,默认保存当前工程根目录 File imageFile = new File("F:/play.png"); //创建输出流 FileOutputStream outStream = new FileOutputStream(imageFile); //写入数据 outStream.write(data); //关闭输出流 outStream.close(); // 插入图片 QRCodeUtil.insertImage(image, imageFile.getPath(), needCompress); return image; } public static byte[] readInputStream(InputStream inStream) throws Exception{ ByteArrayOutputStream outStream = new ByteArrayOutputStream(); //创建一个Buffer字符串 byte[] buffer = new byte[1024]; //每次读取的字符串长度,如果为-1,代表全部读取完毕 int len = 0; //使用一个输入流从buffer里把数据读取出来 while( (len=inStream.read(buffer)) != -1 ){ //用输出流往buffer里写入数据,中间参数代表从哪个位置开始读,len代表读取的长度 outStream.write(buffer, 0, len); } //关闭输入流 inStream.close(); //把outStream里的数据写入内存 byte[] b =outStream.toByteArray(); outStream.close(); return b; } 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; } // todo 有问题 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(); } public static void encode(String content, String imgPath, String destPath, boolean needCompress) throws Exception { BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress); mkdirs(destPath); ImageIO.write(image, FORMAT_NAME, new File(destPath)); } public static BufferedImage encode(String content, String imgPath, boolean needCompress) throws Exception { BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress); return image; } 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(); } } public static void encode(String content, String imgPath, String destPath) throws Exception { QRCodeUtil.encode(content, imgPath, destPath, false); } // 被注释的方法 /* * public static void encode(String content, String destPath, boolean * needCompress) throws Exception { QRCodeUtil.encode(content, null, destPath, * needCompress); } */ public static void encode(String content, String destPath) throws Exception { QRCodeUtil.encode(content, null, destPath, false); } 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); } public static void encode(String content, OutputStream output) throws Exception { QRCodeUtil.encode(content, null, output, false); } 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 hints = new Hashtable(); hints.put(DecodeHintType.CHARACTER_SET, CHARSET); result = new MultiFormatReader().decode(bitmap, hints); String resultStr = result.getText(); return resultStr; } public static String decode(String path) throws Exception { return QRCodeUtil.decode(new File(path)); } }
package com.sun.test.QRcode.AddLOGO; import com.google.zxing.BarcodeFormat; import com.google.zxing.EncodeHintType; import com.google.zxing.MultiFormatWriter; import com.google.zxing.WriterException; import com.google.zxing.common.BitMatrix; import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel; import org.apache.commons.codec.binary.Base64; import javax.imageio.ImageIO; import java.awt.*; import java.awt.image.BufferedImage; import java.io.ByteArrayOutputStream; import java.io.File; import java.util.Date; import java.util.HashMap; import java.util.Map; /** * @Description: (二维码) * @author:luoguohui * @date:2015-10-29 下午05:27:13 */ public class ZXingCode { private static final int QRCOLOR = 0xFF000000; //默认是黑色 private static final int BGWHITE = 0xFFFFFFFF; //背景颜色 public static void main(String[] args) throws WriterException { try { getLogoQRCode("https://www.baidu.com/", "跳转到百度的二维码"); } catch (Exception e) { e.printStackTrace(); } } /** * 生成带logo的二维码图片 */ public static String getLogoQRCode(String qrUrl, String productName) { // String filePath = (javax.servlet.http.HttpServletRequest)request.getSession().getServletContext().getRealPath("/") + "resources/images/logoImages/llhlogo.png"; //filePath是二维码logo的路径,但是实际中我们是放在项目的某个路径下面的,所以路径用上面的,把下面的注释就好 String filePath = "C:/Users/DELL/Desktop/T.png"; //TODO String content = qrUrl; try { ZXingCode zp = new ZXingCode(); BufferedImage bim = zp.getQR_CODEBufferedImage(content, BarcodeFormat.QR_CODE, 400, 400, zp.getDecodeHintType()); return zp.addLogo_QRCode(bim, new File(filePath), new LogoConfig(), productName); } catch (Exception e) { e.printStackTrace(); } return null; } /** * 给二维码图片添加Logo */ public String addLogo_QRCode(BufferedImage bim, File logoPic, LogoConfig logoConfig, String productName) { try { /** * 读取二维码图片,并构建绘图对象 */ BufferedImage image = bim; Graphics2D g = image.createGraphics(); /** * 读取Logo图片 */ BufferedImage logo = ImageIO.read(logoPic); /** * 设置logo的大小,本人设置为二维码图片的20%,因为过大会盖掉二维码 */ int widthLogo = logo.getWidth(null) > image.getWidth() * 3 / 10 ? (image.getWidth() * 3 / 10) : logo.getWidth(null), heightLogo = logo.getHeight(null) > image.getHeight() * 3 / 10 ? (image.getHeight() * 3 / 10) : logo.getWidth(null); /** * logo放在中心 */ int x = (image.getWidth() - widthLogo) / 2; int y = (image.getHeight() - heightLogo) / 2; /** * logo放在右下角 * int x = (image.getWidth() - widthLogo); * int y = (image.getHeight() - heightLogo); */ //开始绘制图片 g.drawImage(logo, x, y, widthLogo, heightLogo, null); // g.drawRoundRect(x, y, widthLogo, heightLogo, 15, 15); // g.setStroke(new BasicStroke(logoConfig.getBorder())); // g.setColor(logoConfig.getBorderColor()); // g.drawRect(x, y, widthLogo, heightLogo); g.dispose(); //把商品名称添加上去,商品名称不要太长哦,这里最多支持两行。太长就会自动截取啦 if (productName != null && !productName.equals("")) { //新的图片,把带logo的二维码下面加上文字 BufferedImage outImage = new BufferedImage(400, 445, BufferedImage.TYPE_4BYTE_ABGR); Graphics2D outg = outImage.createGraphics(); //画二维码到新的面板 outg.drawImage(image, 0, 0, image.getWidth(), image.getHeight(), null); //画文字到新的面板 outg.setColor(Color.BLACK); outg.setFont(new Font("宋体", Font.BOLD, 30)); //字体、字型、字号 int strWidth = outg.getFontMetrics().stringWidth(productName); if (strWidth > 399) { // //长度过长就截取前面部分 // outg.drawString(productName, 0, image.getHeight() + (outImage.getHeight() - image.getHeight())/2 + 5 ); //画文字 //长度过长就换行 String productName1 = productName.substring(0, productName.length() / 2); String productName2 = productName.substring(productName.length() / 2, productName.length()); int strWidth1 = outg.getFontMetrics().stringWidth(productName1); int strWidth2 = outg.getFontMetrics().stringWidth(productName2); outg.drawString(productName1, 200 - strWidth1 / 2, image.getHeight() + (outImage.getHeight() - image.getHeight()) / 2 + 12); BufferedImage outImage2 = new BufferedImage(400, 485, BufferedImage.TYPE_4BYTE_ABGR); Graphics2D outg2 = outImage2.createGraphics(); outg2.drawImage(outImage, 0, 0, outImage.getWidth(), outImage.getHeight(), null); outg2.setColor(Color.BLACK); outg2.setFont(new Font("宋体", Font.BOLD, 30)); //字体、字型、字号 outg2.drawString(productName2, 200 - strWidth2 / 2, outImage.getHeight() + (outImage2.getHeight() - outImage.getHeight()) / 2 + 5); outg2.dispose(); outImage2.flush(); outImage = outImage2; } else { outg.drawString(productName, 200 - strWidth / 2, image.getHeight() + (outImage.getHeight() - image.getHeight()) / 2 + 12); //画文字 } outg.dispose(); outImage.flush(); image = outImage; } logo.flush(); image.flush(); ByteArrayOutputStream baos = new ByteArrayOutputStream(); baos.flush(); ImageIO.write(image, "png", baos); //二维码生成的路径,但是实际项目中,我们是把这生成的二维码显示到界面上的,因此下面的折行代码可以注释掉 //可以看到这个方法最终返回的是这个二维码的imageBase64字符串 //前端用 <play src="data:image/png;base64,${imageBase64QRCode}"/> 其中${imageBase64QRCode}对应二维码的imageBase64字符串 // ImageIO.write(image, "png", new File("C:/Users/luoguohui/Desktop/TDC-" + new Date().getTime() + "test.png")); //TODO ImageIO.write(image, "png", new File("F:/" + new Date().getTime() + "test.png")); String imageBase64QRCode = Base64.encodeBase64URLSafeString(baos.toByteArray()); baos.close(); return imageBase64QRCode; } catch (Exception e) { e.printStackTrace(); } return null; } /** * 构建初始化二维码 * * @param bm * @return */ public BufferedImage fileToBufferedImage(BitMatrix bm) { BufferedImage image = null; try { int w = bm.getWidth(), h = bm.getHeight(); image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB); for (int x = 0; x < w; x++) { for (int y = 0; y < h; y++) { image.setRGB(x, y, bm.get(x, y) ? 0xFF000000 : 0xFFCCDDEE); } } } catch (Exception e) { e.printStackTrace(); } return image; } /** * 生成二维码bufferedImage图片 * * @param content 编码内容 * @param barcodeFormat 编码类型 * @param width 图片宽度 * @param height 图片高度 * @param hints 设置参数 * @return */ public BufferedImage getQR_CODEBufferedImage(String content, BarcodeFormat barcodeFormat, int width, int height, Map<EncodeHintType, ?> hints) { MultiFormatWriter multiFormatWriter = null; BitMatrix bm = null; BufferedImage image = null; try { multiFormatWriter = new MultiFormatWriter(); // 参数顺序分别为:编码内容,编码类型,生成图片宽度,生成图片高度,设置参数 bm = multiFormatWriter.encode(content, barcodeFormat, width, height, hints); int w = bm.getWidth(); int h = bm.getHeight(); image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB); // 开始利用二维码数据创建Bitmap图片,分别设为黑(0xFFFFFFFF)白(0xFF000000)两色 for (int x = 0; x < w; x++) { for (int y = 0; y < h; y++) { image.setRGB(x, y, bm.get(x, y) ? QRCOLOR : BGWHITE); } } } catch (WriterException e) { e.printStackTrace(); } return image; } /** * 设置二维码的格式参数 * * @return */ public Map<EncodeHintType, Object> getDecodeHintType() { // 用于设置QR二维码参数 Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>(); // 设置QR二维码的纠错级别(H为最高级别)具体级别信息 hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H); // 设置编码方式 hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); hints.put(EncodeHintType.MARGIN, 0); hints.put(EncodeHintType.MAX_SIZE, 350); hints.put(EncodeHintType.MIN_SIZE, 100); return hints; } } class LogoConfig { // logo默认边框颜色 public static final Color DEFAULT_BORDERCOLOR = Color.WHITE; // logo默认边框宽度 public static final int DEFAULT_BORDER = 2; // logo大小默认为照片的1/5 public static final int DEFAULT_LOGOPART = 5; private final int border = DEFAULT_BORDER; private final Color borderColor; private final int logoPart; /** */ public LogoConfig() { this(DEFAULT_BORDERCOLOR, DEFAULT_LOGOPART); } public LogoConfig(Color borderColor, int logoPart) { this.borderColor = borderColor; this.logoPart = logoPart; } public Color getBorderColor() { return borderColor; } public int getBorder() { return border; } public int getLogoPart() { return logoPart; } }