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package com.baiye.util;
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import cn.hutool.extra.qrcode.BufferedImageLuminanceSource;
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import com.google.zxing.*;
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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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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.OutputStream;
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import java.util.Hashtable;
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import java.util.Random;
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/**
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* 二维码生成工具
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*
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* @author YQY
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* @date 2022-04-18
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*/
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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 = "JPG";
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// 二维码尺寸
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private static final int QRCODE_SIZE = 300;
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// LOGO宽度
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private static final int LOGO_WIDTH = 60;
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// LOGO高度
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private static final int LOGO_HEIGHT = 60;
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private static BufferedImage createImage(String content, String logoPath, boolean needCompress) throws Exception {
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Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
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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 (logoPath == null || "".equals(logoPath)) {
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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, logoPath, 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
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* 二维码图片
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* @param logoPath
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* LOGO图片地址
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* @param needCompress
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* 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 logoPath, boolean needCompress) throws Exception {
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File file = new File(logoPath);
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if (!file.exists()) {
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throw new Exception("logo file not found.");
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}
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Image src = ImageIO.read(new File(logoPath));
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int width = src.getWidth(null);
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int height = src.getHeight(null);
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if (needCompress) { // 压缩LOGO
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if (width > LOGO_WIDTH) {
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width = LOGO_WIDTH;
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}
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if (height > LOGO_HEIGHT) {
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height = LOGO_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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g.drawImage(image, 0, 0, null); // 绘制缩小后的图
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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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* 生成二维码(内嵌LOGO)
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* 二维码文件名随机，文件名可能会有重复
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*
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* @param content
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* 内容
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* @param logoPath
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* LOGO地址
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* @param destPath
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* 存放目录
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* @param needCompress
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* 是否压缩LOGO
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* @throws Exception
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*/
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public static String encode(String content, String logoPath, String destPath, boolean needCompress) throws Exception {
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BufferedImage image = QRCodeUtil.createImage(content, logoPath, needCompress);
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mkdirs(destPath);
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String fileName = new Random().nextInt(99999999) + "." + FORMAT.toLowerCase();
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ImageIO.write(image, FORMAT, new File(destPath + "/" + fileName));
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return fileName;
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}
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/**
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* 生成二维码(内嵌LOGO)
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* 调用者指定二维码文件名
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*
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* @param content
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* 内容
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* @param logoPath
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* LOGO地址
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* @param destPath
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* 存放目录
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* @param fileName
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* 二维码文件名
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* @param needCompress
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* 是否压缩LOGO
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* @throws Exception
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*/
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public static String encode(String content, String logoPath, String destPath, String fileName, boolean needCompress) throws Exception {
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BufferedImage image = QRCodeUtil.createImage(content, logoPath, needCompress);
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mkdirs(destPath);
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fileName = fileName.substring(0, fileName.indexOf(".")>0?fileName.indexOf("."):fileName.length())
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+ "." + FORMAT.toLowerCase();
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ImageIO.write(image, FORMAT, new File(destPath + "/" + fileName));
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return fileName;
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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．
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* (mkdir如果父目录不存在则会抛出异常)
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* @param destPath
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* 存放目录
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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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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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* 生成二维码(内嵌LOGO)
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*
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* @param content
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* 内容
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* @param logoPath
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* LOGO地址
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* @param destPath
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* 存储地址
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* @throws Exception
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*/
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public static String encode(String content, String logoPath, String destPath) throws Exception {
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return QRCodeUtil.encode(content, logoPath, destPath, false);
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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
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* 内容
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* @param destPath
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* 存储地址
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* @param needCompress
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* 是否压缩LOGO
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* @throws Exception
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*/
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public static String encode(String content, String destPath, boolean needCompress) throws Exception {
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return QRCodeUtil.encode(content, null, destPath, needCompress);
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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
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* 内容
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* @param destPath
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* 存储地址
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* @throws Exception
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*/
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public static String encode(String content, String destPath) throws Exception {
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return QRCodeUtil.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
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* 内容
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* @param logoPath
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* LOGO地址
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* @param output
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* 输出流
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* @param needCompress
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* 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 logoPath, OutputStream output, boolean needCompress)
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throws Exception {
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BufferedImage image = QRCodeUtil.createImage(content, logoPath, needCompress);
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ImageIO.write(image, FORMAT, 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
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* 内容
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* @param output
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* 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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QRCodeUtil.encode(content, null, output, false);
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}
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/**
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* 解析二维码
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*
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* @param file
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* 二维码图片
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* @return
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* @throws Exception
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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<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>();
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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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/**
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* 解析二维码
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*
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* @param path
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* 二维码图片地址
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* @return
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* @throws Exception
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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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}
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yqy
2 years ago