java 生成带Logo的二维码

其他 2018-11-18 02:33:56 阅读次数: 0

java 生成带Logo的二维码

下载QR二维码包，zxing.jar 包
不废话直接上代码

pom.xml

<!-- 条形码、二维码生成 -->
        <dependency>
            <groupId>com.google.zxing</groupId>
            <artifactId>core</artifactId>
            <version>2.2</version>
        </dependency>
        <dependency>
            <groupId>com.google.zxing</groupId>
            <artifactId>javase</artifactId>
            <version>2.2</version>
        </dependency>

工程代码2个核心Java文件如下：

BufferedImageLuminanceSource.java 

package xxx.utils;

import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;

import com.google.zxing.LuminanceSource;

public class BufferedImageLuminanceSource extends LuminanceSource{

    private final BufferedImage image;
    private final int left;
    private final int top;

    public BufferedImageLuminanceSource(BufferedImage image) {
        this(image, 0, 0, image.getWidth(), image.getHeight());
    }

    /**
     * 构造方法
     * @param image
     * @param left
     * @param top
     * @param width
     * @param height
     */
    public BufferedImageLuminanceSource(BufferedImage image, int left, int top, int width, int height) {
        super(width, height);

        int sourceWidth = image.getWidth();
        int sourceHeight = image.getHeight();
        if (left + width > sourceWidth || top + height > sourceHeight) {
            throw new IllegalArgumentException("Crop rectangle does not fit within image data.");
        }

        for (int y = top; y < top + height; y++) {
            for (int x = left; x < left + width; x++) {
                if ((image.getRGB(x, y) & 0xFF000000) == 0) {
                    image.setRGB(x, y, 0xFFFFFFFF); // = white
                }
            }
        }

        this.image = new BufferedImage(sourceWidth, sourceHeight, BufferedImage.TYPE_BYTE_GRAY);
        this.image.getGraphics().drawImage(image, 0, 0, null);
        this.left = left;
        this.top = top;
    }


    @Override
    public byte[] getRow(int y, byte[] row) {//从底层平台的位图提取一行（only one row）的亮度数据值
        if (y < 0 || y >= getHeight()) {
            throw new IllegalArgumentException("Requested row is outside the image: " + y);
        }
        int width = getWidth();
        if (row == null || row.length < width) {
            row = new byte[width];
        }
        image.getRaster().getDataElements(left, top + y, width, 1, row);
        return row;
    }

    @Override
    public byte[] getMatrix() {///从底层平台的位图提取亮度数据值
        int width = getWidth();
        int height = getHeight();
        int area = width * height;
        byte[] matrix = new byte[area];
        image.getRaster().getDataElements(left, top, width, height, matrix);
        return matrix;
    }

    @Override
    public boolean isCropSupported() {//是否支持裁剪
        return true;
    }

    /**
     * 返回一个新的对象与裁剪的图像数据。实现可以保存对原始数据的引用，而不是复制。
     */
    @Override
    public LuminanceSource crop(int left, int top, int width, int height) {
        return new BufferedImageLuminanceSource(image, this.left + left, this.top + top, width, height);
    }

    @Override
    public boolean isRotateSupported() {//是否支持旋转
        return true;
    }

    @Override
    public LuminanceSource rotateCounterClockwise() {//逆时针旋转图像数据的90度，返回一个新的对象。
        int sourceWidth = image.getWidth();
        int sourceHeight = image.getHeight();
        AffineTransform transform = new AffineTransform(0.0, -1.0, 1.0, 0.0, 0.0, sourceWidth);
        BufferedImage rotatedImage = new BufferedImage(sourceHeight, sourceWidth, BufferedImage.TYPE_BYTE_GRAY);
        Graphics2D g = rotatedImage.createGraphics();
        g.drawImage(image, transform, null);
        g.dispose();
        int width = getWidth();
        return new BufferedImageLuminanceSource(rotatedImage, top, sourceWidth - (left + width), getHeight(), width);
    }
}

QRCodeUtil.java

package xxx.utils;


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 java.util.Random;

import javax.imageio.ImageIO;


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;



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;


/**
 * 生成二维码
 * @param content   源内容
 * @param imgPath   生成二维码保存的路径
 * @param needCompress  是否要压缩
 * @return      返回二维码图片
 * @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;
}

/**
 * 在生成的二维码中插入图片
 * @param source
 * @param imgPath
 * @param needCompress
 * @throws Exception
 */
private static void insertImage(BufferedImage source, String imgPath, boolean needCompress) throws Exception {
    File file1 = new File(imgPath);
    if (!file1.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();
}

/**
 * 生成带logo二维码，并保存到磁盘
 * @param content
 * @param imgPath   logo图片
 * @param destPath
 * @param needCompress
 * @throws Exception
 */
public static void encode(String content, String imgPath, String destPath, boolean needCompress,String file) throws Exception {
    BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress);
    mkdirs(destPath);

    ImageIO.write(image, FORMAT_NAME, new File(destPath + "/" + file));
}

public static void mkdirs(String destPath) {
    File file = new File(destPath);
    // 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)
    if (!file.exists() && !file.isDirectory()) {
        file.mkdirs();
    }
}

public static void encode(String content, String imgPath, String destPath,String file) throws Exception {
    QRCodeUtil.encode(content, imgPath, destPath, false ,file);
}

public static void encode(String content, String destPath, boolean needCompress,String file) throws Exception {
    QRCodeUtil.encode(content, null, destPath, needCompress,file);
}

public static void encode(String content, String destPath,String file) throws Exception {
    QRCodeUtil.encode(content, null, destPath, false,file);
}

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);
}

public static void encode(String content, OutputStream output) throws Exception {
    QRCodeUtil.encode(content, null, output, false);
}


/**
 * 从二维码中，解析数据
 * @param file  二维码图片文件
 * @return   返回从二维码中解析到的数据值
 * @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;
}

public static String decode(String path) throws Exception {
    return QRCodeUtil.decode(new File(path));
}

}

Controller

String textt = "www.baidu.com";//二维码的内容
String logo = path+"/logo.png";//logo的路径
String file = new Random().nextInt(99999999) + ".jpg";//生成随机文件名
System.out.println(file.toString()+"文件名");

QRCodeUtil.encode(textt,logo,path,true,file);//path 二维码保存的服务器的路径

这里写图片描述
到这二维码就生成了 剩下的你想干啥干啥!!!

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转载自blog.csdn.net/weixin_41695965/article/details/82589889
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