package yanzm;
import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; import java.nio.file.FileSystems; import java.nio.file.Path; import java.util.HashMap; import java.util.Map; import javax.imageio.ImageIO; import org.junit.Test; import com.alibaba.fastjson.JSONObject; import com.google.zxing.BarcodeFormat; import com.google.zxing.Binarizer; import com.google.zxing.BinaryBitmap; import com.google.zxing.DecodeHintType; import com.google.zxing.EncodeHintType; import com.google.zxing.LuminanceSource; import com.google.zxing.MultiFormatReader; import com.google.zxing.MultiFormatWriter; import com.google.zxing.NotFoundException; import com.google.zxing.Result; import com.google.zxing.WriterException; import com.google.zxing.client.j2se.BufferedImageLuminanceSource; import com.google.zxing.client.j2se.MatrixToImageWriter; import com.google.zxing.common.BitMatrix; import com.google.zxing.common.HybridBinarizer; public class yzm { public static void main(String[] args)throws WriterException, IOException { testEncode(); } /** * 生成图像 * * @throws WriterException * @throws IOException */ public static void testEncode() throws WriterException, IOException { String filePath = "D://"; String fileName = "zxing.png"; JSONObject json = new JSONObject(); json.put( "zxing","https://github.com/zxing/zxing/tree/zxing-3.0.0/javase/src/main/java/com/google/zxing"); json.put("author", "shihy"); String content = json.toJSONString();// 内容 int width = 200; // 图像宽度 int height = 200; // 图像高度 String format = "png";// 图像类型 Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>(); hints.put(EncodeHintType.CHARACTER_SET, "UTF-8"); BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);// 生成矩阵 Path path = FileSystems.getDefault().getPath(filePath, fileName); MatrixToImageWriter.writeToPath(bitMatrix, format, path);// 输出图像 System.out.println("输出成功."); } /** * 解析图像 */ public void testDecode() { String filePath = "D://zxing.png"; BufferedImage image; try { image = ImageIO.read(new File(filePath)); LuminanceSource source = new BufferedImageLuminanceSource(image); Binarizer binarizer = new HybridBinarizer(source); BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer); Map<DecodeHintType, Object> hints = new HashMap<DecodeHintType, Object>(); hints.put(DecodeHintType.CHARACTER_SET, "UTF-8"); Result result = new MultiFormatReader().decode(binaryBitmap, hints);// 对图像进行解码 JSONObject content = JSONObject.parseObject(result.getText()); System.out.println("图片中内容: "); System.out.println("author: " + content.getString("author")); System.out.println("zxing: " + content.getString("zxing")); System.out.println("图片中格式: "); System.out.println("encode: " + result.getBarcodeFormat()); } catch (IOException e) { e.printStackTrace(); } catch (NotFoundException e) { e.printStackTrace(); } } }
--------------------------------------------------------二 带logo地址:http://blog.csdn.net/wangnan537/article/details/50353174---------------------------------------------------------------------------
package yanzm; 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.client.j2se.BufferedImageLuminanceSource; 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 = "JPG"; // 二维码尺寸 private static final int QRCODE_SIZE = 300; // LOGO宽度 private static final int LOGO_WIDTH = 60; // LOGO高度 private static final int LOGO_HEIGHT = 60; 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; } // 插入图片 QRCodeUtil.insertImage(image, logoPath, needCompress); return image; } /** * 插入LOGO * * @param source * 二维码图片 * @param logoPath * LOGO图片地址 * @param needCompress * 是否压缩 * @throws Exception */ private static void insertImage(BufferedImage source, String logoPath, boolean needCompress) throws Exception { File file = new File(logoPath); if (!file.exists()) { throw new Exception("logo file not found."); } 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(); } /** * 生成二维码(内嵌LOGO) * 二维码文件名随机,文件名可能会有重复 * * @param content * 内容 * @param logoPath * LOGO地址 * @param destPath * 存放目录 * @param needCompress * 是否压缩LOGO * @throws Exception */ public static String encode(String content, String logoPath, String destPath, boolean needCompress) throws Exception { BufferedImage image = QRCodeUtil.createImage(content, logoPath, needCompress); mkdirs(destPath); String fileName = new Random().nextInt(99999999) + "." + FORMAT.toLowerCase(); ImageIO.write(image, FORMAT, new File(destPath + "/" + fileName)); return fileName; } /** * 生成二维码(内嵌LOGO) * 调用者指定二维码文件名 * * @param content * 内容 * @param logoPath * LOGO地址 * @param destPath * 存放目录 * @param fileName * 二维码文件名 * @param needCompress * 是否压缩LOGO * @throws Exception */ public static String encode(String content, String logoPath, String destPath, String fileName, boolean needCompress) throws Exception { BufferedImage image = QRCodeUtil.createImage(content, logoPath, needCompress); mkdirs(destPath); fileName = fileName.substring(0, fileName.indexOf(".")>0?fileName.indexOf("."):fileName.length()) + "." + FORMAT.toLowerCase(); ImageIO.write(image, FORMAT, new File(destPath + "/" + fileName)); return fileName; } /** * 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) * @param destPath * 存放目录 */ public static void mkdirs(String destPath) { File file = new File(destPath); if (!file.exists() && !file.isDirectory()) { file.mkdirs(); } } /** * 生成二维码(内嵌LOGO) * * @param content * 内容 * @param logoPath * LOGO地址 * @param destPath * 存储地址 * @throws Exception */ public static String encode(String content, String logoPath, String destPath) throws Exception { return QRCodeUtil.encode(content, logoPath, 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 String encode(String content, String destPath, boolean needCompress) throws Exception { return 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 String encode(String content, String destPath) throws Exception { return QRCodeUtil.encode(content, null, destPath, false); } /** * 生成二维码(内嵌LOGO) * * @param content * 内容 * @param logoPath * LOGO地址 * @param output * 输出流 * @param needCompress * 是否压缩LOGO * @throws Exception */ 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, 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.baidu.com"; //不含Logo //QRCodeUtil.encode(text, null, "e:\\\\", true); //含Logo,不指定二维码图片名 //QRCodeUtil.encode(text, "e:\\\\csdn.jpg", "e:\\\\", true); //含Logo,指定二维码图片名 QRCodeUtil.encode(text, "e:\\\\csdn.jpg", "e:\\\\", "qrcode", true); } }
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