package com.lp.util; import com.google.zxing.*; 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; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import javax.imageio.ImageIO; import java.awt.*; import java.awt.font.FontRenderContext; import java.awt.geom.Rectangle2D; import java.awt.geom.RoundRectangle2D; import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; import java.io.OutputStream; import java.util.Hashtable; import java.util.Random; /** * 二维码工具类 Created by fuli.shen on 2017/3/31. */ 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; /** * LOG */ protected final static Logger LOGGER = LoggerFactory.getLogger(QRCodeUtil.class); /** * 生成二维码的方法 * * @param content * 目标URL * @param imgPath * LOGO图片地址 * @param needCompress * 是否压缩LOGO * @return 二维码图片 * @throws Exception */ private static BufferedImage createImage(String content, String imgPath, boolean needCompress) throws Exception { Hashtable hints = new Hashtable(); 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)); } public static void encode(String content, String imgPath, String destPath, boolean needCompress,String fileName) throws Exception { LogUtil4j.debugLogger.debug("{} encode is called with {}---{}---{}---{}" , QRCodeUtil.class, content, imgPath, destPath, fileName); BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress); mkdirs(destPath); String file =fileName + ".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) * * @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 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 hints = new Hashtable(); 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 不是二维码的内容返回null,是二维码直接返回识别的结果 * @throws Exception */ public static String decode(String path) throws Exception { return QRCodeUtil.decode(new File(path)); } /**给图片增加文字 * @param str * 生产的图片文字 * @param oldPath * 原图片保存路径 * @param newPath * 新图片保存路径 * @param width * 定义生成图片宽度 * @param height * 定义生成图片高度 * @return * @throws IOException */ public static void addImgText(String str, String oldPath, String newPath, int width, int height){ try { File oldFile = new File(oldPath); Image image = ImageIO.read(oldFile); //获取图像的高度，宽度 height=image.getHeight(null); width =image.getWidth(null); int text_height = 1 * 20; height = height+text_height; File file = new File(newPath); BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); //构建图片流 BufferedImage tag = new BufferedImage(width / 2, height / 2, BufferedImage.TYPE_INT_RGB); //绘制改变尺寸后的图 tag.getGraphics().drawImage(bi, 0, 0,width / 2, height / 2, null); Graphics2D g2 = bi.createGraphics(); g2.setBackground(Color.WHITE); g2.clearRect(0, 0, width, height); g2.drawImage(image, 0, 0, width, height-text_height, null); //这里减去25是为了防止字和图重合 /** 设置生成图片的文字样式 * */ Font font = new Font("黑体", Font.BOLD, 20); g2.setFont(font); g2.setPaint(Color.BLACK); /** 设置字体在图片中的位置 在这里是居中* */ FontRenderContext context = g2.getFontRenderContext(); /** 防止生成的文字带有锯齿 * */ g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON); Rectangle2D bounds = font.getStringBounds(str, context); double ascent = -bounds.getY(); double x = 25.0; double y = height - text_height- bounds.getHeight()+5; double baseY = 0.0; /** 在图片上生成文字 * */ while(str.length()>13){ int length = 13; String temp = str.substring(0,length); bounds = font.getStringBounds(temp, context); while(bounds.getWidth()