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package com.iformall.utils; |
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import java.awt.BasicStroke; |
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import java.awt.Graphics; |
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import java.awt.Graphics2D; |
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import java.awt.Image; |
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import java.awt.Shape; |
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import java.awt.geom.RoundRectangle2D; |
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import java.awt.image.BufferedImage; |
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import java.io.File; |
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import java.io.OutputStream; |
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import java.util.Hashtable; |
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import javax.imageio.ImageIO; |
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import com.google.zxing.BarcodeFormat; |
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import com.google.zxing.BinaryBitmap; |
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import com.google.zxing.DecodeHintType; |
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import com.google.zxing.EncodeHintType; |
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import com.google.zxing.MultiFormatReader; |
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import com.google.zxing.MultiFormatWriter; |
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import com.google.zxing.Result; |
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import com.google.zxing.common.BitMatrix; |
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import com.google.zxing.common.HybridBinarizer; |
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import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel; |
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public class QRCodeUtil { |
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private static final String CHARSET = "utf-8"; |
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private static final String FORMAT_NAME = "JPG"; |
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/** |
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* 二维码尺寸 |
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*/ |
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private static final int QRCODE_SIZE = 300; |
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/** |
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* LOGO宽度 |
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*/ |
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private static final int WIDTH = 60; |
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/** |
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* LOGO高度 |
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*/ |
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private static final int HEIGHT = 60; |
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private static BufferedImage createImage(String content, String imgPath, boolean needCompress) throws Exception { |
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Hashtable hints = new Hashtable(); |
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hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H); |
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hints.put(EncodeHintType.CHARACTER_SET, CHARSET); |
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hints.put(EncodeHintType.MARGIN, 1); |
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BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, |
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hints); |
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int width = bitMatrix.getWidth(); |
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int height = bitMatrix.getHeight(); |
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BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); |
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for (int x = 0; x < width; x++) { |
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for (int y = 0; y < height; y++) { |
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image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF); |
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} |
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} |
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if (imgPath == null || "".equals(imgPath)) { |
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return image; |
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} |
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// 插入图片 |
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QRCodeUtil.insertImage(image, imgPath, needCompress); |
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return image; |
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} |
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private static void insertImage(BufferedImage source, String imgPath, boolean needCompress) throws Exception { |
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File file = new File(imgPath); |
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if (!file.exists()) { |
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System.err.println("" + imgPath + " 该文件不存在!"); |
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return; |
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} |
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Image src = ImageIO.read(new File(imgPath)); |
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int width = src.getWidth(null); |
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int height = src.getHeight(null); |
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// 压缩LOGO |
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if (needCompress) { |
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if (width > WIDTH) { |
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width = WIDTH; |
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} |
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if (height > HEIGHT) { |
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height = HEIGHT; |
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} |
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Image image = src.getScaledInstance(width, height, Image.SCALE_SMOOTH); |
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BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); |
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Graphics g = tag.getGraphics(); |
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// 绘制缩小后的图 |
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g.drawImage(image, 0, 0, null); |
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g.dispose(); |
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src = image; |
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} |
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// 插入LOGO |
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Graphics2D graph = source.createGraphics(); |
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int x = (QRCODE_SIZE - width) / 2; |
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int y = (QRCODE_SIZE - height) / 2; |
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graph.drawImage(src, x, y, width, height, null); |
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Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6); |
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graph.setStroke(new BasicStroke(3f)); |
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graph.draw(shape); |
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graph.dispose(); |
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} |
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public static void encode(String content, String imgPath, String destPath, boolean needCompress) throws Exception { |
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BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress); |
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mkdirs(destPath); |
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// String file = new Random().nextInt(99999999)+".jpg"; |
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// ImageIO.write(image, FORMAT_NAME, new File(destPath+"/"+file)); |
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ImageIO.write(image, FORMAT_NAME, new File(destPath)); |
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} |
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public static BufferedImage encode(String content, String imgPath, boolean needCompress) throws Exception { |
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BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress); |
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return image; |
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} |
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public static void mkdirs(String destPath) { |
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File file = new File(destPath); |
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// 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) |
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if (!file.exists() && !file.isDirectory()) { |
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file.mkdirs(); |
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} |
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} |
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public static void encode(String content, String imgPath, String destPath) throws Exception { |
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QRCodeUtil.encode(content, imgPath, destPath, false); |
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} |
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// 被注释的方法 |
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/* |
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* public static void encode(String content, String destPath, boolean |
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* needCompress) throws Exception { QRCodeUtil.encode(content, null, destPath, |
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* needCompress); } |
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*/ |
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public static void encode(String content, String destPath) throws Exception { |
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QRCodeUtil.encode(content, null, destPath, false); |
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} |
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public static void encode(String content, String imgPath, OutputStream output, boolean needCompress) |
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throws Exception { |
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BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress); |
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ImageIO.write(image, FORMAT_NAME, output); |
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} |
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public static void encode(String content, OutputStream output) throws Exception { |
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QRCodeUtil.encode(content, null, output, false); |
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} |
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public static String decode(File file) throws Exception { |
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BufferedImage image; |
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image = ImageIO.read(file); |
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if (image == null) { |
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return null; |
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} |
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BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image); |
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BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source)); |
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Result result; |
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Hashtable hints = new Hashtable(); |
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hints.put(DecodeHintType.CHARACTER_SET, CHARSET); |
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result = new MultiFormatReader().decode(bitmap, hints); |
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String resultStr = result.getText(); |
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return resultStr; |
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} |
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public static String decode(String path) throws Exception { |
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return QRCodeUtil.decode(new File(path)); |
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} |
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} |