二维码生成Java实现代码

package com.yihaomen.barcode;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.Result;import com.google.zxing.common.BitMatrix;import com.google.zxing.common.HybridBinarizer;import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;/** * 二维码工具类 *  */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<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 (imgPath == null || "".equals(imgPath)) {   return image;  }  // 插入图片  QRCodeUtil.insertImage(image, imgPath, needCompress);  return image; } /**  * 插入LOGO  *   * @param source  *   二维码图片  * @param imgPath  *   LOGO图片地址  * @param needCompress  *   是否压缩  * @throws Exception  */ 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;   }   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(); } /**  * 生成二维码(内嵌LOGO)  *   * @param content  *   内容  * @param imgPath  *   LOGO地址  * @param destPath  *   存放目录  * @param needCompress  *   是否压缩LOGO  * @throws Exception  */ public static void encode(String content, String imgPath, String destPath,   boolean needCompress) throws Exception {  BufferedImage image = QRCodeUtil.createImage(content, imgPath,    needCompress);  mkdirs(destPath);  String file = new Random().nextInt(99999999)+".jpg";  ImageIO.write(image, FORMAT_NAME, new File(destPath+"/"+file)); } /**  * 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)  * @author lanyuan  * Email: mmm333zzz520@163.com  * @date 2013-12-11 上午10:16:36  * @param destPath 存放目录  */ 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();  } } /**  * 生成二维码(内嵌LOGO)  *   * @param content  *   内容  * @param imgPath  *   LOGO地址  * @param destPath  *   存储地址  * @throws Exception  */ public static void encode(String content, String imgPath, String destPath)   throws Exception {  QRCodeUtil.encode(content, imgPath, destPath, false); } /**  * 生成二维码  *   * @param content  *   内容  * @param destPath  *   存储地址  * @param needCompress  *   是否压缩LOGO  * @throws Exception  */ public static void encode(String content, String destPath,   boolean needCompress) throws Exception {  QRCodeUtil.encode(content, null, destPath, needCompress); } /**  * 生成二维码  *   * @param content  *   内容  * @param destPath  *   存储地址  * @throws Exception  */ public static void encode(String content, String destPath) throws Exception {  QRCodeUtil.encode(content, null, destPath, false); } /**  * 生成二维码(内嵌LOGO)  *   * @param content  *   内容  * @param imgPath  *   LOGO地址  * @param output  *   输出流  * @param needCompress  *   是否压缩LOGO  * @throws Exception  */ 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); } /**  * 生成二维码  *   * @param content  *   内容  * @param output  *   输出流  * @throws Exception  */ public static void encode(String content, OutputStream output)   throws Exception {  QRCodeUtil.encode(content, null, output, false); } /**  * 解析二维码  *   * @param file  *   二维码图片  * @return  * @throws Exception  */ 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<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>();  hints.put(DecodeHintType.CHARACTER_SET, CHARSET);  result = new MultiFormatReader().decode(bitmap, hints);  String resultStr = result.getText();  return resultStr; } /**  * 解析二维码  *   * @param path  *   二维码图片地址  * @return  * @throws Exception  */ public static String decode(String path) throws Exception {  return QRCodeUtil.decode(new File(path)); } public static void main(String[] args) throws Exception {  String text = "http://www.yihaomen.com";  QRCodeUtil.encode(text, "c:/me.jpg", "c:/barcode", true); }}