BitMatrix 生普通二维码，加logo二维码，和二维码底部加文字得二维码 com.google.zxing，并且以流返回给前端，和byte方式返回前端

BitMatrix 生普通二维码，加logo二维码，和二维码底部加文字得二维码 com.google.zxing

因开发需求，并且搜了很多博客无果，参考了几篇博客后，终于做出来了，在此记录一下，注：带logo的二维码按照底部文字使用，这里没有这个需求，就没做

上代码

package com.fc.test.util;


import com.fc.test.test.erweima.QRCodeUtil;
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 java.awt.*;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Map;

/**
 *  

 *      生成二维码的工具类
 *  
 *
 * @author robocon
 * @date 2019-05-09
 * */
public class QRCodeUtils {

    /**
     *  生成二维码
     * @param content 二维码的内容
     * @return BitMatrix对象
     * */
    public static BitMatrix createCode(Map<String, String> content) throws IOException {
        //二维码的宽高
        int width = 400;
        int height = 400;

        //其他参数，如字符集编码
        Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();
        hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
        //容错级别为H
        hints.put(EncodeHintType.ERROR_CORRECTION , ErrorCorrectionLevel.H);
        //白边的宽度，可取0~4
        hints.put(EncodeHintType.MARGIN , 3);

        BitMatrix bitMatrix = null;
        try {
            //生成矩阵，
            bitMatrix = new MultiFormatWriter().encode(String.valueOf(content),
                    BarcodeFormat.QR_CODE, width, height, hints);

            //bitMatrix = deleteWhite(bitMatrix);
        } catch (WriterException e) {
            e.printStackTrace();
        }

        return bitMatrix;
    }

    /**
     * 创建 二维码所需图片
     * @param content 内容
     * @return
     * @throws Exception
     */
    public static BufferedImage createImage(Map<String, String> content, String bottomDes) throws Exception {
        Hashtable hints = new Hashtable();
        int width = 400;
        int height = 400;
        //容错级别 H->30%
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        hints.put(EncodeHintType.MARGIN, 1);
        BitMatrix bitMatrix = new MultiFormatWriter().encode(String.valueOf(content),
                BarcodeFormat.QR_CODE, width, height, hints);
        int tempHeight = height;
        boolean needDescription=(null!=bottomDes&&!"".equals(bottomDes));
        if (needDescription) {
            tempHeight += 30;
        }
        BufferedImage image = new BufferedImage(width, tempHeight,
                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);
            }
        }
       addFontImage(image, bottomDes);
        //========同理添加logo=====现在不需添加logo
        return image;
    }

    /**
     * 添加 底部图片文字
     * @param source 图片源
     * @param declareText 文字本文
     */
    private static void addFontImage(BufferedImage source, String declareText) {
        Graphics2D graph = source.createGraphics();
        graph.setColor(Color.white);
        graph.drawString(declareText,20,420);
        graph.dispose();
    }



    /**
     *  删除生成的二维码周围的白边，根据审美决定是否删除
     * @param matrix BitMatrix对象
     * @return BitMatrix对象
     * */
    private static BitMatrix deleteWhite(BitMatrix matrix) {
        int[] rec = matrix.getEnclosingRectangle();
        int resWidth = rec[2] + 1;
        int resHeight = rec[3] + 1;

        BitMatrix resMatrix = new BitMatrix(resWidth, resHeight);
        resMatrix.clear();
        for (int i = 0; i < resWidth; i++) {
            for (int j = 0; j < resHeight; j++) {
                if (matrix.get(i + rec[0], j + rec[1])) {
                    resMatrix.set(i, j);
                }
            }
        }
        return resMatrix;
    }
    /**
     * 插入Logo图片
     * @param source 图片操作对象
     * @param logoImage Logo图片地址
     * @param needCompress 是否压缩Logo大小
     * @throws Exception
     */
    // LOGO宽度
    private static final int WIDTH = 60;
    // LOGO高度
    private static final int HEIGHT = 60;
    // 二维码尺寸
    private static final int QRCODE_SIZE = 300;
    private static void insertImage(BufferedImage source,BufferedImage logoImage,
                                    boolean needCompress) throws Exception {
        int width = logoImage.getWidth(null);
        int height = logoImage.getHeight(null);

        Image src =logoImage;
        if (needCompress) {
            if (width > WIDTH) {
                width = WIDTH;
            }
            if (height > HEIGHT) {
                height = HEIGHT;
            }

            Image image = logoImage.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);
            g.dispose();
            src = image;
        }
        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();
    }
}

接口类

/**
	 *  生成普通二维码
	 * @param

	 * */
	@GetMapping(value = "code1")
	public void getCode1(String id , HttpServletResponse response) throws IOException {
		// 设置响应流信息
		response.setContentType("image/jpg");
		response.setDateHeader("Expires", 0);
		OutputStream stream = response.getOutputStream();
		CEvaTeam cEvaTeam  = cEvaTeamService.selectByPrimaryKey(id);
		response.setHeader("Content-Disposition", "Attachment;Filename=" +
				new String(cEvaTeam.getTeamName().getBytes(), "iso-8859-1")+".jpg");
		if(cEvaTeam!=null){
			CEvaluation cEvaluation = cEvaluationService.selectByPrimaryKey(cEvaTeam.getEvaId()+"");
			String type =String.join(",",sysDictDataService.DictToStr("article",cEvaluation.getEvaType()));
			Object count = redisUtil.get(GlobalConfiguration.TEAM_EVA+cEvaTeam.getTeamCode());
			Map<String ,String> param = new HashMap<>();
			if(!StringUtils.isNull(count)){
				if(cEvaTeam.getTeamReal()<Integer.parseInt(count.toString())){
					param.put("number",Integer.parseInt(count.toString())+"");
				}else{
					param.put("number",cEvaTeam.getTeamReal()+"");
				}
			}else{
				param.put("number","0");
			}
			param.put("evaName",cEvaluation.getTitle());
			param.put("evaType",type);
			param.put("evaid",cEvaTeam.getEvaId()+"");
			param.put("type",GlobalConfiguration.C_EVALUATION);
			param.put("teamCode",cEvaTeam.getTeamCode());
			//获取一个二维码图片
			BitMatrix bitMatrix = QRCodeUtils.createCode(param);
			//以流的形式输出到前端
			MatrixToImageWriter.writeToStream(bitMatrix , "jpg" , stream);
		}
	}

	/**
	 *  生成带logo /文字二维码
	 * @param

	 * */
	@GetMapping(value = "code")
	public void getCode(String id , HttpServletResponse response) throws Exception {
		// 设置响应流信息
		response.setContentType("image/jpg");
		response.setDateHeader("Expires", 0);
		OutputStream stream = response.getOutputStream();
		CEvaTeam cEvaTeam  = cEvaTeamService.selectByPrimaryKey(id);
		response.setHeader("Content-Disposition", "Attachment;Filename=" +
				new String(cEvaTeam.getTeamName().getBytes(), "iso-8859-1")+".jpg");
		if(cEvaTeam!=null){
			CEvaluation cEvaluation = cEvaluationService.selectByPrimaryKey(cEvaTeam.getEvaId()+"");
			String type =String.join(",",sysDictDataService.DictToStr("article",cEvaluation.getEvaType()));
			Object count = redisUtil.get(GlobalConfiguration.TEAM_EVA+cEvaTeam.getTeamCode());
			Map<String ,String> param = new HashMap<>();
			if(!StringUtils.isNull(count)){
				if(cEvaTeam.getTeamReal()<Integer.parseInt(count.toString())){
					param.put("number",Integer.parseInt(count.toString())+"");
				}else{
					param.put("number",cEvaTeam.getTeamReal()+"");
				}
			}else{
				param.put("number","0");
			}
			param.put("evaName",cEvaluation.getTitle());
			param.put("evaType",type);
			param.put("evaid",cEvaTeam.getEvaId()+"");
			param.put("type",GlobalConfiguration.C_EVALUATION);
			param.put("teamCode",cEvaTeam.getTeamCode());
			//获取一个二维码图片
			BufferedImage bufferedImage = QRCodeUtils.createImage(param,cEvaTeam.getTeamName());
			ByteArrayOutputStream bos = new ByteArrayOutputStream();
			ImageIO.write(bufferedImage, "jpg", bos);
			response.getOutputStream().write(bos.toByteArray());
			//以流的形式输出到前端
		}
	}

效果如下，logo方法已经在工具类中，只是这次这个需求，普通二维码，和底部带文字的二维码