package com.doumee.core.utils;
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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 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.util.Hashtable;
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/**
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* 二维码生成工具类
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*/
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public class QrCodeUtils {
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private static final String CHARSET = "utf-8";
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public 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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/**
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* 生成二维码
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*
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* @param content 二维码内容
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* @param logoPath logo地址
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* @param needCompress 是否压缩logo
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* @return 图片
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*/
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public static BufferedImage createImage(String content, String logoPath, 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, 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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QrCodeUtils.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 二维码图片
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* @param logoPath LOGO图片地址
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* @param needCompress 是否压缩
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*/
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private static void insertImage(BufferedImage source, String logoPath,
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boolean needCompress) throws Exception {
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File file = new File(logoPath);
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if (!file.exists()) {
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System.err.println(""+logoPath+" 该文件不存在！");
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return;
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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,
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Image.SCALE_SMOOTH);
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BufferedImage tag = new BufferedImage(width, height,
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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（指定路径保存）
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*
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* @param content 内容
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* @param imgPath logo图片地址（内嵌图片）
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* @param destPath 生成二维码存放地址
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* @param needCompress 是否压缩logo
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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, FORMAT, new File(destPath));
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}
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/**
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* 生成二维码(直接将二维码以图片输出流返回）
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*
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* @param content 内容
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* @param imgPath logo图片地址（内嵌图片）
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* @param needCompress 是否压缩logo
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* @return 二维码图片
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*/
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public static BufferedImage encode(String content, String imgPath, boolean needCompress) throws Exception {
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return QrCodeUtils.createImage(content, imgPath, needCompress);
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}
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/**
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* 创建多级文件
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*
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* @param destPath 目标目录
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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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// 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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* 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 logoPath 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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*/
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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 = QrCodeUtils.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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* 获取指定文件的输入流，获取logo
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*
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* @param logoPath 文件的路径
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* @return 输入流
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*/
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public static InputStream getResourceAsStream(String logoPath) {
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return QrCodeUtils.class.getResourceAsStream(logoPath);
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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 二维码图片
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* @return 解析结果
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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<>();
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hints.put(DecodeHintType.CHARACTER_SET, CHARSET);
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result = new MultiFormatReader().decode(bitmap, hints);
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return result.getText();
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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 二维码图片地址
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* @return 二维码解析结果
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*/
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// public static String decode(String path) throws Exception {
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// return QrCodeUtils.decode(new File(path));
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// }
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}
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