Java：Java編程實現導出二維碼

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目錄

輸出結果

代碼設計

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輸出結果

更新……

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代碼設計

public class QRCodeUtil {private static final String CHARSET = "utf-8";private static final String FORMAT_NAME = "JPG";// 二維碼尺寸private static final int QRCODE_SIZE = 300;// LOGO寬度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;}// 插入圖片QRCodeUtil.insertImage(image, imgPath, needCompress);return image;}private static void insertImage(BufferedImage source, String imgPath,boolean needCompress) throws Exception {File file = new File(imgPath);if (!file.exists()) {System.err.println(""+imgPath+" 該文件不存在！");return;}Image src = ImageIO.read(new File(imgPath));int width = src.getWidth(null);int height = src.getHeight(null);if (needCompress) { // 壓縮LOGOif (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); // 繪制縮小后的圖g.dispose();src = image;}// 插入LOGOGraphics2D 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();}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));}public static void mkdirs(String destPath) {File file =new File(destPath); //當文件夾不存在時，mkdirs會自動創建多層目錄，區別于mkdir．(mkdir如果父目錄不存在則會拋出異常)if (!file.exists() && !file.isDirectory()) {file.mkdirs();}}/*** 生成二維碼(內嵌LOGO)* * @param content* 內容* @param imgPath* LOGO地址* @param destPath* 存儲地址* @throws Exception*/public static void encode(String content, String imgPath, String destPath)throws Exception {QRCodeUtil.encode(content, imgPath, destPath, false);}/*** 生成二維碼* * @param content* 內容* @param destPath* 存儲地址* @param needCompress* 是否壓縮LOGO* @throws Exception*/public static void encode(String content, String destPath,boolean needCompress) throws Exception {QRCodeUtil.encode(content, null, destPath, needCompress);}/*** 生成二維碼* * @param content* 內容* @param destPath* 存儲地址* @throws Exception*/public static void encode(String content, String destPath) throws Exception {QRCodeUtil.encode(content, null, destPath, false);}/*** 生成二維碼(內嵌LOGO)* * @param content* 內容* @param imgPath* LOGO地址* @param output* 輸出流* @param needCompress* 是否壓縮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);}/*** 生成二維碼* * @param content* 內容* @param output* 輸出流* @throws Exception*/public static void encode(String content, OutputStream output)throws Exception {QRCodeUtil.encode(content, null, output, false);}/*** 解析二維碼* * @param file* 二維碼圖片* @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;}/*** 解析二維碼* * @param path* 二維碼圖片地址* @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.jason-niu.com";QRCodeUtil.encode(text, "G:/創業/云崖牛logo小.jpg", "G:/創業/云崖牛barcode", true);} }

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