wanggongfeng
4 years ago
7 changed files with 278 additions and 1 deletions
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package com.elink.esua.epdc.commons.tools.utils; |
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import com.elink.esua.epdc.commons.tools.constant.StrConstant; |
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import com.google.zxing.BarcodeFormat; |
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import com.google.zxing.EncodeHintType; |
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import com.google.zxing.MultiFormatWriter; |
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import com.google.zxing.common.BitMatrix; |
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import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel; |
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import lombok.extern.slf4j.Slf4j; |
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import org.apache.commons.codec.CharEncoding; |
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import org.apache.commons.lang3.StringUtils; |
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import javax.imageio.ImageIO; |
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import java.awt.*; |
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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.InputStream; |
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import java.io.OutputStream; |
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import java.net.URL; |
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import java.util.Hashtable; |
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/** |
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* 二维码工具类 |
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* |
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* @author yujintao |
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* @date 2018/11/12 14:49 |
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*/ |
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@Slf4j |
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public class QrCodeUtils { |
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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 = 800; |
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/** |
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* 生成二维码图片，并转为byte[] |
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* |
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* @param content 二维码内的信息 |
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* @param imgPath logo地址 |
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* @param needCompress 是否压缩logo |
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* @return java.awt.image.BufferedImage |
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* @author work@yujt.net.cn |
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* @date 2020/8/7 10:58 |
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*/ |
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public static byte[] encodeByByte(String content, String imgPath, boolean needCompress) { |
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return FileUtils.imageToBytes(encodeByImage(content, imgPath, needCompress), StrConstant.SUFFIX_IMG_PNG); |
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} |
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/** |
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* 生成二维码图片 |
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* |
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* @param content 二维码内的信息 |
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* @param imgPath logo地址 |
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* @param needCompress 是否压缩logo |
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* @return java.awt.image.BufferedImage |
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* @author work@yujt.net.cn |
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* @date 2020/8/7 10:58 |
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*/ |
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public static BufferedImage encodeByImage(String content, String imgPath, boolean needCompress) { |
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BufferedImage image = null; |
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try { |
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image = QrCodeUtils.createImage(content, imgPath, needCompress); |
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} catch (Exception e) { |
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log.error("创建二维码失败，\n content={} \n imagePath={}", content, imgPath); |
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} |
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return image; |
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} |
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/** |
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* 生成二维码(内嵌LOGO)，选择是否压缩logo，直接存入指定文件目录 |
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* |
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* @param content 内容 |
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* @param imgPath LOGO地址 |
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* @param destPath 存放目录 |
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* @param needCompress 是否压缩LOGO |
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* @throws Exception |
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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 = QrCodeUtils.createImage(content, imgPath, needCompress); |
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mkdirs(destPath); |
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ImageIO.write(image, StrConstant.SUFFIX_IMG_PNG, new File(destPath)); |
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} |
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/** |
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* 生成二维码(内嵌LOGO)，不压缩logo，直接存入指定目录 |
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* |
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* @param content 内容 |
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* @param imgPath LOGO地址 |
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* @param destPath 存储地址 |
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* @throws Exception |
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*/ |
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public static void encode(String content, String imgPath, String destPath) throws Exception { |
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QrCodeUtils.encode(content, imgPath, destPath, false); |
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} |
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/** |
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* 生成二维码，不插入logo |
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* |
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* @param content 内容 |
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* @param destPath 存储地址 |
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* @throws Exception |
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*/ |
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public static void encode(String content, String destPath) throws Exception { |
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QrCodeUtils.encode(content, null, destPath, false); |
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} |
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/** |
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* 生成二维码(内嵌LOGO) |
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* |
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* @param content 内容 |
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* @param imgPath LOGO地址 |
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* @param output 输出流 |
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* @param needCompress 是否压缩LOGO |
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* @throws Exception |
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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 = QrCodeUtils.createImage(content, imgPath, needCompress); |
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ImageIO.write(image, StrConstant.SUFFIX_IMG_PNG, output); |
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} |
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/** |
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* 生成二维码 |
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* |
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* @param content 内容 |
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* @param output 输出流 |
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* @throws Exception |
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*/ |
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public static void encode(String content, OutputStream output) throws Exception { |
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QrCodeUtils.encode(content, null, output, false); |
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} |
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private static BufferedImage createImage(String content, String imgPath, boolean needCompress) throws Exception { |
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Hashtable<EncodeHintType, Object> hints = new Hashtable(); |
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hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H); |
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hints.put(EncodeHintType.CHARACTER_SET, CharEncoding.UTF_8); |
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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 (StringUtils.isBlank(imgPath)) { |
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return image; |
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} |
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// 插入logo图片
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QrCodeUtils.insertImage(image, imgPath, needCompress); |
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return image; |
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} |
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/** |
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* 插入LOGO |
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* |
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* @param source 二维码图片 |
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* @param imgPath LOGO图片地址 |
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* @param needCompress 是否压缩 |
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* @throws Exception |
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*/ |
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private static void insertImage(BufferedImage source, String imgPath, boolean needCompress) throws Exception { |
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URL url = new URL(imgPath); |
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InputStream is = url.openConnection().getInputStream(); |
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Image src = ImageIO.read(is); |
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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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// 限制最大LOGO宽度
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int maxWidth = QRCODE_SIZE / 4; |
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// 限制最大LOGO高度
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int maxHeight = QRCODE_SIZE / 4; |
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if (width > maxWidth) { |
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width = maxWidth; |
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} |
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if (height > maxHeight) { |
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height = maxHeight; |
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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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/** |
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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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* |
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* @param destPath 存放目录 |
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* @author lanyuan Email: mmm333zzz520@163.com |
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* @date 2013-12-11 上午10:16:36 |
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*/ |
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private 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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} |
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