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[Java教程]java二维码工具类,中间带LOGO的,很强大


jar包下载maven 配置:<dependency>   <groupId>com.google.zxing</groupId>   <artifactId>core</artifactId>   <version>3.2.1</version> </dependency>   Java代码 收藏代码package com.util.cccm;  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 = "薯 灯可分列式本上楞珂要瓜熟蒂落!000000000000000";     QRCodeUtil.encode(text, "c:/df.jsp", "c:/a/", true);   } }  

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