java ZXing生成二维码及条码实例分享

 package com.webos.util; 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 = getHeight()) { throw new IllegalArgumentException("Requested row is outside the image: " + y); } int width = getWidth(); if (row == null || row.length 

 package com.webos.util; 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.common.BitMatrix; import com.google.zxing.common.HybridBinarizer; import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel; /** * @ClassName: QRCodeUtil * @Description: 二维码编码 * @author Liuy * @date 2016年7月9日 下午3:03:24 * */ public class QRCodeUtil { // 设置二维码编码格式 private static final String CHARSET = "utf-8"; // 保存的二维码格式 private static final String FORMAT_NAME = "JPG"; // 二维码尺寸 private static final int QRCODE_SIZE = 800; // LOGO宽度 private static final int LOGO_WIDTH = 80; // LOGO高度 private static final int LOGO_HEIGHT = 80; /** * @Title: createImage * @Description: 将二维码内容创建到Image流 * @param content 二维码内容 * @param imgPath logo图片地址 * @param needCompress 是否压缩logo图片大小 * @return * @throws Exception 参数说明 * @return BufferedImage 返回类型 * @throws */ private static BufferedImage createImage(String content, String logoPath, 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  LOGO_WIDTH) { width = LOGO_WIDTH; } if (height > LOGO_HEIGHT) { height = LOGO_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(); } /** * @Title: mkdirs * @Description: 创建文件夹 * @param destPath 文件夹地址 * @return void 返回类型 * @throws */ private static boolean 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(); return true; } return false; } /** * @Title: encode * @Description: 生成二维码 * @param content 二维码内容 * @param imgPath logo图片地址 * @param destPath 目标保存地址 * @param needCompress 是否压缩logo图片大小 * @throws Exception 参数说明 * @return void 返回类型 * @throws */ private static void encode(String content, String logoPath, String destPath, boolean needCompress) throws Exception { BufferedImage image = QRCodeUtil.createImage(content, logoPath, needCompress); if (mkdirs(destPath)) { String file = new Random().nextInt(99999999) + ".jpg-600"; ImageIO.write(image, FORMAT_NAME, new File(destPath + "/" + file)); } } /** * @Title: encode * @Description: 生成二维码 * @param content 二维码内容 * @param destPath 目标保存地址 * @throws Exception 参数说明 * @return void 返回类型 * @throws */ public static void encode(String content, String destPath) throws Exception { QRCodeUtil.encode(content, null, destPath, false); } /** * @Title: encode * @Description: 生成二维码 * @param content 二维码内容 * @param imgPath logo图片地址 * @param output 输出流 * @param needCompress 是否压缩logo图片大小 * @throws Exception 参数说明 * @return void 返回类型 * @throws */ public static void encode(String content, String logoPath, OutputStream output, boolean needCompress) throws Exception { BufferedImage image = QRCodeUtil.createImage(content, logoPath, needCompress); ImageIO.write(image, FORMAT_NAME, output); } /** * @Title: encode * @Description: 生成二维码 * @param content 二维码内容 * @param output 输出流 * @throws Exception 参数说明 * @return void 返回类型 * @throws */ public static void encode(String content, OutputStream output) throws Exception { QRCodeUtil.encode(content, null, output, false); } /** * @Title: decode * @Description: 对二维码解码 * @param file 文件对象 * @return 解码后的二维码内容字符串 * @throws Exception 参数说明 * @return String 返回类型 * @throws */ private 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)); Hashtable hints = new Hashtable(); hints.put(DecodeHintType.CHARACTER_SET, CHARSET); return new MultiFormatReader().decode(bitmap, hints).getText(); } /** * @Title: decode * @Description: 对二维码解码 * @param path 文件路径 * @return * @throws Exception 参数说明 * @return String 返回类型 * @throws */ public static String decode(String path) throws Exception { return QRCodeUtil.decode(new File(path)); } }

 package com.webos.servlet; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.webos.util.QRCodeUtil; /* * Servlet implementation class QRCodeServlet */ @WebServlet("/QRCodeServlet") public class QRCodeServlet extends HttpServlet { private static final long serialVersionUID = 1L; /* * @see HttpServlet#HttpServlet() */ public QRCodeServlet() { super(); } /* * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse * response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { try { String text = "http://www.baidu.com?timestamp=" + System.currentTimeMillis(); QRCodeUtil.encode(text, response.getOutputStream()); } catch (Exception e) { e.printStackTrace(); } } /* * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse * response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }