使用zxing生成彩色或帶圖片的二維碼

<!-- https://mvnrepository.com/artifact/com.google.zxing/core -->
    <dependency>
      <groupId>com.google.zxing</groupId>
      <artifactId>core</artifactId>
      <version>3.3.0</version>
    </dependency>
 
    <!-- https://mvnrepository.com/artifact/com.google.zxing/javase -->
    <dependency>
      <groupId>com.google.zxing</groupId>
      <artifactId>javase</artifactId>
      <version>3.3.0</version>
    </dependency>

package com.ambow.common.utils;

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.servlet.http.HttpServletResponse;
import java.awt.*;
import java.awt.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Hashtable;
import java.util.Map;

/**
 * @author 周志偉
 * @projectname 項目名稱:
 * @classname: CreateColourImageORCode
 * @description:
 * @date 2019/8/7：18:53
 */
public class CreateColourImageORCode {
    // 圖片寬度的一半
    private static final int IMAGE_WIDTH = 50;
    private static final int IMAGE_HEIGHT = 50;
    private static final int IMAGE_HALF_WIDTH = IMAGE_WIDTH / 2;
    private static final int FRAME_WIDTH = 2;
    // 二維碼寫碼器
    private static MultiFormatWriter mutiWriter = new MultiFormatWriter();

    public static void encode(String content, int width, int height, String srcImagePath, HttpServletResponse response) {
        response.setContentType("image/jpeg");// 設置相應類型,告訴瀏覽器輸出的內容為圖片
        response.setHeader("Pragma", "No-cache");// 設置響應頭信息，告訴瀏覽器不要緩存此內容
        response.setHeader("Cache-Control", "no-cache");
        response.setDateHeader("Expire", 0);
        try {
            //生成圖片文件
            ImageIO.write(genBarcode(content, width, height, srcImagePath), "jpg",  response.getOutputStream());
            System.out.println("二維碼生成成功！");
        } catch (IOException e) {
            e.printStackTrace();
        } catch (WriterException e) {
            e.printStackTrace();
        }
    }
    /**
     * 得到BufferedImage
     *
     * @param content 二維碼顯示的文本
     * @param width   二維碼的寬度
     * @param height  二維碼的高度
     * @return
     * @throws WriterException
     * @throws IOException
     */
    private static BufferedImage genBarcode(String content, int width,
                                            int height, String srcImagePath) throws WriterException,
            IOException {
        // 讀取源圖像
        BufferedImage scaleImage = scale(srcImagePath, IMAGE_WIDTH,
                IMAGE_HEIGHT, true);
        int[][] srcPixels = new int[IMAGE_WIDTH][IMAGE_HEIGHT];
        for (int i = 0; i < scaleImage.getWidth(); i++) {
            for (int j = 0; j < scaleImage.getHeight(); j++) {
                srcPixels[i][j] = scaleImage.getRGB(i, j);//圖片的像素點
            }
        }
        //編碼
        Map hints = new Hashtable<EncodeHintType, String>();
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        //設置容錯等級，在這里我們使用M級別
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
        // 生成二維碼
        BitMatrix matrix = mutiWriter.encode(content, BarcodeFormat.QR_CODE, width, height, hints);

        // 二維矩陣轉為一維像素數組
        int halfW = matrix.getWidth() / 2;
        int halfH = matrix.getHeight() / 2;
        int[] pixels = new int[width * height];

        for (int y = 0; y < matrix.getHeight(); y++) {
            for (int x = 0; x < matrix.getWidth(); x++) {
                // 左上角顏色,根據自己需要調整顏色范圍和顏色
                /*if (x > 0 && x < 170 && y > 0 && y < 170) {
                    Color color = new Color(231, 144, 56);
                    int colorInt = color.getRGB();
                    pixels[y * width + x] = matrix.get(x, y) ? colorInt
                            : 16777215;
                } else*/
                // 讀取圖片
                if (x > halfW - IMAGE_HALF_WIDTH
                        && x < halfW + IMAGE_HALF_WIDTH
                        && y > halfH - IMAGE_HALF_WIDTH
                        && y < halfH + IMAGE_HALF_WIDTH) {
                    pixels[y * width + x] = srcPixels[x - halfW
                            + IMAGE_HALF_WIDTH][y - halfH + IMAGE_HALF_WIDTH];
                }
                // 在圖片四周形成邊框
                else if ((x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH
                        && x < halfW - IMAGE_HALF_WIDTH + FRAME_WIDTH
                        && y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH
                        + IMAGE_HALF_WIDTH + FRAME_WIDTH)
                        || (x > halfW + IMAGE_HALF_WIDTH - FRAME_WIDTH
                        && x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH
                        && y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH
                        + IMAGE_HALF_WIDTH + FRAME_WIDTH)
                        || (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH
                        && x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH
                        && y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH
                        - IMAGE_HALF_WIDTH + FRAME_WIDTH)
                        || (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH
                        && x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH
                        && y > halfH + IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH
                        + IMAGE_HALF_WIDTH + FRAME_WIDTH)) {
                    pixels[y * width + x] = 0xfffffff;
                } else {
                    // 二維碼顏色（RGB）
                    int num1 = (int) (50 - (50.0 - 13.0) / matrix.getHeight()
                            * (y + 1));
                    int num2 = (int) (165 - (165.0 - 72.0) / matrix.getHeight()
                            * (y + 1));
                    int num3 = (int) (162 - (162.0 - 107.0)
                            / matrix.getHeight() * (y + 1));
                    Color color = new Color(num1, num2, num3);
                    int colorInt = color.getRGB();
                    // 此處可以修改二維碼的顏色，可以分別制定二維碼和背景的顏色；
                    pixels[y * width + x] = matrix.get(x, y) ? colorInt : 16777215;// 0x000000:0xffffff
                }
            }
        }

        BufferedImage image = new BufferedImage(width, height,
                BufferedImage.TYPE_INT_RGB);
        image.getRaster().setDataElements(0, 0, width, height, pixels);

        return image;
    }

    /**
     * 把傳入的原始圖像按高度和寬度進行縮放，生成符合要求的圖標
     *
     * @param srcImageFile 源文件地址
     * @param height       目標高度
     * @param width        目標寬度
     * @param hasFiller    比例不對時是否需要補白：true為補白; false為不補白;
     * @throws IOException
     */
    private static BufferedImage scale(String srcImageFile, int height, int width, boolean hasFiller) throws IOException {
        double ratio = 0.0; // 縮放比例
        File file = new File(srcImageFile);
        BufferedImage srcImage = ImageIO.read(file);
        Image destImage = srcImage.getScaledInstance(width, height,
                BufferedImage.SCALE_SMOOTH);
        // 計算比例
        if ((srcImage.getHeight() > height) || (srcImage.getWidth() > width)) {
            if (srcImage.getHeight() > srcImage.getWidth()) {
                ratio = (new Integer(height)).doubleValue()
                        / srcImage.getHeight();
            } else {
                ratio = (new Integer(width)).doubleValue()
                        / srcImage.getWidth();
            }
            AffineTransformOp op = new AffineTransformOp(
                    AffineTransform.getScaleInstance(ratio, ratio), null);
            destImage = op.filter(srcImage, null);
        }
        if (hasFiller) {// 補白
            BufferedImage image = new BufferedImage(width, height,
                    BufferedImage.TYPE_INT_RGB);
            Graphics2D graphic = image.createGraphics();
            graphic.setColor(Color.white);
            graphic.fillRect(0, 0, width, height);
            if (width == destImage.getWidth(null))
                graphic.drawImage(destImage, 0,
                        (height - destImage.getHeight(null)) / 2,
                        destImage.getWidth(null), destImage.getHeight(null),
                        Color.white, null);//畫圖片
            else
                graphic.drawImage(destImage,
                        (width - destImage.getWidth(null)) / 2, 0,
                        destImage.getWidth(null), destImage.getHeight(null),
                        Color.white, null);
            graphic.dispose();
            destImage = image;
        }
        return (BufferedImage) destImage;
    }
}

    @RequestMapping(value = "getQrcode", method = RequestMethod.GET)
    @ApiOperation(value = "生成二維碼", httpMethod = "GET")
    public  ResponseResult getQrcode(@RequestParam(value = "content", required = true) String content, HttpServletResponse resp) throws Exception {
        ResponseResult responseResult =new ResponseResult();
        CreateColourImageORCode.encode(content,300,300,"D://logo.png",resp);
        responseResult.setMessage("成功");
        return responseResult;

    }