生成自定义文字的二维码

代码是生产上一直在用的，里面有main方法，方便大家自己测试；对于参数设定，可根据自身需要进行调整。

pom文件

        <dependency>
            <groupId>com.google.zxing</groupId>
            <artifactId>core</artifactId>
            <version>3.3.3</version>
        </dependency>

package com.image;

/**
 * Created by Liuxd on 2018-09-07.
 */

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

import javax.imageio.ImageIO;
import javax.imageio.stream.FileImageOutputStream;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.util.HashMap;
import java.util.Map;

/**
 * 二维码
 */
public class GenerateQrCode {
    private static final int QRCOLOR = 0xFF000000;   //默认是黑色
    private static final int BGWHITE = 0xFFFFFFFF;   //背景颜色

    public static void main(String[] args) {
        byte[] bytes = GenerateQrCode.getLogoQRCode("https://blog.csdn.net/jiahao1186", "博客");
        //生成一个图片对象。
        byte2image(bytes, "D:/1.jpg");
    }

    public static void byte2image(byte[] data, String path) {
        if (data.length < 3 || path.equals("")) return;
        try {
            FileImageOutputStream imageOutput = new FileImageOutputStream(new File(path));
            imageOutput.write(data, 0, data.length);
            imageOutput.close();
            System.out.println("图片已生成，请按如下地址，查找图片：" + path);
        } catch (Exception ex) {
            System.out.println("Exception: " + ex);
            ex.printStackTrace();
        }
    }

    /**
     * 生成带logo的二维码图片
     */
    public static byte[] getLogoQRCode(String qrUrl, String License) {
        String content = qrUrl;
        try {
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            FontImage.getImage(License, 65, 65, bos);

            GenerateQrCode zp = new GenerateQrCode();
            BufferedImage bim = zp.getQR_CODEBufferedImage(content, BarcodeFormat.QR_CODE, 258, 258, zp.getDecodeHintType());
            return zp.addLogo_QRCode(bim, bos.toByteArray(), new LogoConfig());
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 给二维码图片添加Logo
     *
     * @param logoPic
     */
    public byte[] addLogo_QRCode(BufferedImage bim, byte[] logoPic, LogoConfig logoConfig) {
        try {
            /**
             * 读取二维码图片，并构建绘图对象
             */
            BufferedImage image = bim;
            Graphics2D g = image.createGraphics();

            /**
             * 读取Logo图片
             */
            ByteArrayInputStream in = new ByteArrayInputStream(logoPic);
            BufferedImage logo = ImageIO.read(in);
            /**
             * 设置logo的大小,本人设置为二维码图片的20%,因为过大会盖掉二维码
             */
            int widthLogo = logo.getWidth(null) > image.getWidth() * 3 / 10 ? (image.getWidth() * 3 / 10) : logo.getWidth(null);
            int heightLogo = logo.getHeight(null) > image.getHeight() * 3 / 10 ? (image.getHeight() * 3 / 10) : logo.getWidth(null);

            /**
             * logo放在中心
             */
            int x = (image.getWidth() - widthLogo) / 2;
            int y = (image.getHeight() - heightLogo) / 2;
            /**
             * logo放在右下角
             *  int x = (image.getWidth() - widthLogo);
             *  int y = (image.getHeight() - heightLogo);
             */

            //开始绘制图片
            g.drawImage(logo, x, y, widthLogo, heightLogo, null);
            g.dispose();

            logo.flush();
            image.flush();
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            baos.flush();
            ImageIO.write(image, "png", baos);

            //二维码生成的路径，但是实际项目中，我们是把这生成的二维码显示到界面上的，因此下面的折行代码可以注释掉
            //可以看到这个方法最终返回的是这个二维码的imageBase64字符串
            //前端用 <img src="data:image/png;base64,${imageBase64QRCode}"/>  其中${imageBase64QRCode}对应二维码的imageBase64字符串
//            ImageIO.write(image, "png", new File("/Users/zhanglei/Downloads/" + new Date().getTime() + "test.png")); //TODO
//
//            String imageBase64QRCode =  Base64.encodeBase64URLSafeString(baos.toByteArray());

//            baos.close();

            return baos.toByteArray();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }


    /**
     * 构建初始化二维码
     *
     * @param bm
     * @return
     */
    public BufferedImage fileToBufferedImage(BitMatrix bm) {
        BufferedImage image = null;
        try {
            int w = bm.getWidth(), h = bm.getHeight();
            image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);

            for (int x = 0; x < w; x++) {
                for (int y = 0; y < h; y++) {
                    image.setRGB(x, y, bm.get(x, y) ? 0xFF000000 : 0xFFCCDDEE);
                }
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
        return image;
    }

    /**
     * 生成二维码bufferedImage图片
     *
     * @param content       编码内容
     * @param barcodeFormat 编码类型
     * @param width         图片宽度
     * @param height        图片高度
     * @param hints         设置参数
     * @return
     */
    public BufferedImage getQR_CODEBufferedImage(String content, BarcodeFormat barcodeFormat, int width, int height, Map<EncodeHintType, ?> hints) {
        MultiFormatWriter multiFormatWriter = null;
        BitMatrix bm = null;
        BufferedImage image = null;
        try {
            multiFormatWriter = new MultiFormatWriter();
            // 参数顺序分别为：编码内容，编码类型，生成图片宽度，生成图片高度，设置参数
            bm = multiFormatWriter.encode(content, barcodeFormat, width, height, hints);
            int w = bm.getWidth();
            int h = bm.getHeight();
            image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);

            // 开始利用二维码数据创建Bitmap图片，分别设为黑（0xFFFFFFFF）白（0xFF000000）两色
            for (int x = 0; x < w; x++) {
                for (int y = 0; y < h; y++) {
                    image.setRGB(x, y, bm.get(x, y) ? QRCOLOR : BGWHITE);
                }
            }
        } catch (WriterException e) {
            e.printStackTrace();
        }
        return image;
    }

    /**
     * 设置二维码的格式参数
     *
     * @return
     */
    public Map<EncodeHintType, Object> getDecodeHintType() {
        // 用于设置QR二维码参数
        Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();
        // 设置QR二维码的纠错级别（H为最高级别）具体级别信息
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
        // 设置编码方式
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        hints.put(EncodeHintType.MARGIN, 0);
        hints.put(EncodeHintType.MAX_SIZE, 350);
        hints.put(EncodeHintType.MIN_SIZE, 100);

        return hints;
    }
}

package com.image;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.font.FontRenderContext;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.util.UUID;

/**
 * 创建文字图片
 *
 */
public class FontImage {
    // 默认格式
    private static final String FORMAT_NAME = "JPG";
    // 默认 宽度
    private static final int WIDTH = 100;
    // 默认 高度
    private static final int HEIGHT = 100;

    /**
     * 创建图片
     *
     * @param content 内容
     * @param font    字体
     * @param width   宽
     * @param height  高
     * @return
     */
    private static BufferedImage createImage(String content, Font font, Integer width, Integer height) {
        BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        Graphics2D g2 = (Graphics2D) bi.getGraphics();
        g2.setBackground(Color.WHITE);
        g2.clearRect(0, 0, width, height);
        g2.setPaint(Color.BLACK);

        FontRenderContext context = g2.getFontRenderContext();
        Rectangle2D bounds = font.getStringBounds(content, context);
        double x = (width - bounds.getWidth()) / 2;
        double y = (height - bounds.getHeight()) / 2;
        double ascent = -bounds.getY();
        double baseY = y + ascent;

        g2.drawString(content, (int) x, (int) baseY);

        return bi;
    }

    /**
     * 获取 图片
     *
     * @param content 内容
     * @param font    字体
     * @param width   宽
     * @param height  高
     * @return
     */
    public static BufferedImage getImage(String content, Font font, Integer width, Integer height) {
        width = width == null ? WIDTH : width;
        height = height == null ? HEIGHT : height;
        if (null == font)
            font = new Font("宋体", Font.BOLD, 13);
        return createImage(content, font, width, height);
    }

    /**
     * 获取 图片
     *
     * @param content 内容
     * @param width   宽
     * @param height  高
     * @return
     */
    public static BufferedImage getImage(String content, Integer width, Integer height) {

        return getImage(content, null, width, height);
    }

    /**
     * 获取图片
     *
     * @param content 内容
     * @return
     */
    public static BufferedImage getImage(String content) {

        return getImage(content, null, null);
    }

    /**
     * 获取图片
     *
     * @param content  内容
     * @param font     字体
     * @param width    宽
     * @param height   高
     * @param destPath 输出路径
     * @throws IOException
     */
    public static void getImage(String content, Font font, Integer width, Integer height, String destPath) throws IOException {
        mkdirs(destPath);
        String file = UUID.randomUUID().toString() + ".jpg";
        ImageIO.write(getImage(content, font, width, height), FORMAT_NAME, new File(destPath + "/" + file));
    }

    /**
     * 获取图片
     *
     * @param content 内容
     * @param font    字体
     * @param width   宽
     * @param height  高
     * @param output  输出流
     * @throws IOException
     */
    public static void getImage(String content, Font font, Integer width, Integer height, OutputStream output) throws IOException {
        ImageIO.write(getImage(content, font, width, height), FORMAT_NAME, output);
    }

    /**
     * 获取图片
     *
     * @param content  内容
     * @param width    宽
     * @param height   高
     * @param destPath 输出路径
     * @throws IOException
     */
    public static void getImage(String content, Integer width, Integer height, String destPath) throws IOException {
        getImage(content, null, width, height, destPath);
    }

    /**
     * 获取图片
     *
     * @param content 内容
     * @param width   宽
     * @param height  高
     * @param output  输出流
     * @throws IOException
     */
    public static void getImage(String content, Integer width, Integer height, OutputStream output) throws IOException {
        getImage(content, null, width, height, output);
    }


    /**
     * 创建 目录
     *
     * @param destPath
     */
    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 main(String[] args) throws Exception {
        getImage("川A***V", 100, 100, "D:/");

    }
}

package com.image;

import java.awt.*;

/**
 * Created by Liuxd on 2018-09-07.
 */
public class LogoConfig {
    // logo默认边框颜色
    public static final Color DEFAULT_BORDERCOLOR = Color.WHITE;
    // logo默认边框宽度
    public static final int DEFAULT_BORDER = 2;
    // logo大小默认为照片的1/5
    public static final int DEFAULT_LOGOPART = 5;

    private final int border = DEFAULT_BORDER;
    private final Color borderColor;
    private final int logoPart;

    /**
     * Creates a default config with on color and off color
     * generating normal black-on-white barcodes.
     */
    public LogoConfig() {
        this(DEFAULT_BORDERCOLOR, DEFAULT_LOGOPART);
    }

    public LogoConfig(Color borderColor, int logoPart) {
        this.borderColor = borderColor;
        this.logoPart = logoPart;
    }

    public Color getBorderColor() {
        return borderColor;
    }

    public int getBorder() {
        return border;
    }

    public int getLogoPart() {
        return logoPart;
    }
}