Java | Java實現url和二維碼之間的轉換工具類 zxing（全）

一、Maven依賴

        <!--二維碼-->
        <dependency>
            <groupId>com.google.zxing</groupId>
            <artifactId>core</artifactId>
            <version>3.1.0</version>
        </dependency>
        <dependency>
            <groupId>com.google.zxing</groupId>
            <artifactId>javase</artifactId>
            <version>3.1.0</version>
        </dependency>

二、工具類

1.QRCodeUtil

package com.zhifubao.util;

import java.awt.BasicStroke;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Shape;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.OutputStream;
import java.util.Hashtable;

import javax.imageio.ImageIO;

import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import org.apache.log4j.Logger;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.Result;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

/**
 * 二維碼工具類
 */
public class QRCodeUtil {
    private static final Logger LOGGER = Logger.getLogger(QRCodeUtil.class);

    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;

    public static void main(String[] args) throws Exception {
        String text = "http://www.baidu.com";
        String fileName = QRCodeUtil.encode(text, "F:/QR/");
        System.out.println("fileName:" + fileName);
    }

    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;
    }

    /**
     * 插入LOGO
     *
     * @param source       二維碼圖片
     * @param imgPath      LOGO圖片地址
     * @param needCompress 是否壓縮
     * @throws Exception
     */
    private static void insertImage(BufferedImage source, String imgPath,
                                    boolean needCompress) throws Exception {
        File file = new File(imgPath);
        if (!file.exists()) {
            LOGGER.info("" + 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); // 繪製縮小後的圖
            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();
    }

    /**
     * 生成二維碼(內嵌LOGO)
     *
     * @param content      內容
     * @param imgPath      LOGO地址
     * @param destPath     存放目錄
     * @param needCompress 是否壓縮LOGO
     * @return 文件名
     * @throws Exception
     */
    public static String encode(String content, String imgPath, String destPath,
                                boolean needCompress) throws Exception {
        BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress);
        mkdirs(destPath);
        String file = UUIDUtil.createUUID() + ".jpg";
        ImageIO.write(image, FORMAT_NAME, new File(destPath + "/" + file));
        return file;
    }

    /**
     * 文件夾不存在時，mkdirs會自動創建多層目錄，區別於mkdir．(mkdir如果父目錄不存在則會拋出異常)
     *
     * @param destPath 存放目錄
     */
    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，區別於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, true);
    }

    /**
     * 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
     * @return 文件名
     * @throws Exception
     */
    public static String encode(String content, String destPath) {
        String fileName = null;
        try {
            fileName = QRCodeUtil.encode(content, null, destPath, false);
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return fileName;
    }

    /**
     * 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));
    }

}

2.UUIDUtil

package com.zhifubao.util;

import java.util.UUID;

public class UUIDUtil {
    public static String createUUID() {
        return UUID.randomUUID().toString().replace("-", "");
    }
}