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 < 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); }}

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<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 (logoPath == null || "".equals(logoPath)) {   return image;  }  // 插入logo  QRCodeUtil.insertImage(image, logoPath, needCompress);  return image; } /**  * @Title: insertImage  * @Description: 将logo插入到二维码中  * @param source 二维码Image流  * @param imgPath logo地址  * @param needCompress 是否压缩大小  * @throws Exception 参数说明  * @return void 返回类型  * @throws  */ private static void insertImage(BufferedImage source, String logoPath, boolean needCompress) throws Exception {  File file = new File(logoPath);  if (!file.exists()) {   System.err.println("" + logoPath + " 该文件不存在！");   return;  }  Image src = ImageIO.read(new File(logoPath));  int width = src.getWidth(null);  int height = src.getHeight(null);  if (needCompress) { // 压缩LOGO   if (width > 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";   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<DecodeHintType, String> hints = new Hashtable<DecodeHintType, String>();  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); }}