滑块、点选验证码

AbstractCaptchaService.java

package com.central.user.service.impl;

import cn.jmfen.base.enums.ErrorCodeEnum;
import com.central.user.bo.CaptchaBaseBo;
import com.central.user.bo.CaptchaCheckBo;
import com.central.user.exceptions.PassportBizException;
import com.central.user.utils.ImageProcessUtil;
import com.central.user.utils.RandomUtils;
import com.central.user.utils.UploadUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;
import org.springframework.util.Base64Utils;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.LinkedList;
import java.util.List;
import java.util.UUID;
import java.util.concurrent.ConcurrentHashMap;

/**
 * @author jsf
 * @description: 图行验证码抽象方法
 * @date 2019/10/8 19:32
 */
@Slf4j
public abstract class AbstractCaptchaService {

    /**
     * 阿里云文件路径前缀
     */
    private static final String FILE_PATH_PREFIX = "avatar/captcha";

    /**
     * 文件资源数组
     */
    private static ConcurrentHashMap<String, List<BufferedImage>> imageCache = new ConcurrentHashMap<>();

    /**
     * 创建行为验证码
     *
     * @return
     */
    public abstract CaptchaBaseBo createCaptcha();

    /**
     * 验证行为验证码
     *
     * @return
     */
    public abstract boolean verification(CaptchaCheckBo checkBo);

    /**
     * 获取原生图片
     *
     * @param imageDir 图片目录
     * @return
     */
    protected static BufferedImage getBufferedImage(String imageDir) {
        if (StringUtils.isBlank(imageDir)) {
            throw new PassportBizException(ErrorCodeEnum.GLOBAL_ERROR.getCode(), "imageDir is empty.");
        }
        List<BufferedImage> bufferedImages = imageCache.get(imageDir);
        int randomNum = RandomUtils.getRandomRange(0, bufferedImages.size() - 1);
        BufferedImage bufferedImage = bufferedImages.get(randomNum);
        return ImageProcessUtil.copyImagePixel(bufferedImage);
    }

    /**
     *  初始化图片数组
     * @param imageDir 图片目录
     */
    protected static void initImageCache(String imageDir){
        ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
        try {
            log.info("行为验证码->initImageCache");
            long start = System.currentTimeMillis();
            Resource[] resources = resolver.getResources("classpath*:" + imageDir + "/*");
            LinkedList<BufferedImage> bufferedImages = new LinkedList<>();
            for (int i = 0; i < resources.length; i++) {
                log.info("ImageIO.read开始");
                long start2 = System.currentTimeMillis();
                BufferedImage bufferedImage = ImageIO.read(resources[i].getInputStream());
                long end2 = System.currentTimeMillis();
                log.info("ImageIO.read结束,耗时：{}",end2-start2);
                bufferedImages.add(bufferedImage);
            }
            imageCache.put(imageDir,bufferedImages);
            long end = System.currentTimeMillis();
            log.info("行为验证码->initImageCache,耗时：{}",end-start);
        } catch (IOException e) {
            log.error("imageDir error.", e);
            throw new PassportBizException(ErrorCodeEnum.GLOBAL_ERROR.getCode(), "imageDir error.");
        }
    }

    /**
     * 图片转base64 字符串
     *
     * @param templateImage 图片buffer
     * @return
     */
    protected static String getImageToBase64Str(BufferedImage templateImage,String imageType) {
        //输出流
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        try {
            ImageIO.write(templateImage, imageType, baos);
        } catch (IOException e) {
            throw new PassportBizException(ErrorCodeEnum.GLOBAL_ERROR.getCode(), "ImageIO.write is error");
        }
        byte[] bytes = baos.toByteArray();
        //去除base64加密后的换行和制表符
        return Base64Utils.encodeToString(bytes).trim().replaceAll("[\\s*\t\n\r]", "");
    }

    /**
     * 上传文件
     *
     * @param templateImage 文件流
     * @param uploadUtil    上传工具
     * @return
     */
    protected static String getImageUrl(BufferedImage templateImage, UploadUtil uploadUtil, String imageType) {
        String path = FILE_PATH_PREFIX + "/" + UUID.randomUUID().toString() + "." + imageType;
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        try {
            log.info("ImageIO.write开始");
            long start = System.currentTimeMillis();
            ImageIO.write(templateImage, imageType, outputStream);
            long end = System.currentTimeMillis();
            log.info("ImageIO.write结束,耗时：{}",end-start);
        } catch (IOException e) {
            log.error("ImageIO.write error!", e);
            throw new PassportBizException(ErrorCodeEnum.GLOBAL_ERROR.getCode(), "ImageIO.write is error");
        }
        InputStream inputStream = new ByteArrayInputStream(outputStream.toByteArray());
        return uploadUtil.uploadSimpleImage(path, inputStream);
    }
}

BlockPuzzleCaptchaServiceImpl.java

package com.central.user.service.impl;

import cn.jmfen.base.enums.ErrorCodeEnum;
import com.central.user.bo.BlockPuzzleCaptchaBo;
import com.central.user.bo.CaptchaBaseBo;
import com.central.user.bo.CaptchaCheckBo;
import com.central.user.bo.ImageBo;
import com.central.user.config.CaptchaConfig;
import com.central.user.exceptions.PassportBizException;
import com.central.user.utils.ImageProcessUtil;
import com.central.user.utils.RandomUtils;
import com.central.user.utils.UploadUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.annotation.PostConstruct;
import java.awt.*;
import java.awt.image.BufferedImage;

/**
 * @author jsf
 * @description: 滑块拼图验证码
 * @date 2019/10/8 19:37
 */
@Service
@Slf4j
public class BlockPuzzleCaptchaServiceImpl extends AbstractCaptchaService {

    @Autowired
    private CaptchaConfig config;

    @Autowired
    private UploadUtil uploadUtil;

    @PostConstruct
    public void init() {
        //初始化图片数组
        initImageCache(config.getJigsawDir());
        initImageCache(config.getBlockImageDir());
    }

    @Override
    public CaptchaBaseBo createCaptcha() {
        BufferedImage originalImage = getBufferedImage(config.getJigsawDir());
        BufferedImage blockImage = getBufferedImage(config.getBlockImageDir());
        return pictureTemplatesCut(originalImage, blockImage);
    }

    @Override
    public boolean verification(CaptchaCheckBo checkBo) {
        Double distance = checkBo.getDistance();
        Double rawDistance = checkBo.getRawDistance();
        if (null == distance || null == rawDistance) {
            log.error("滑动验证码距离为空,distance:{},rawDistance:{}", distance, rawDistance);
            return false;
        }
        log.info("滑块验证码检验精度: {}", config.getSlideValidatePercent());
        if (Math.abs(rawDistance - distance) > getBlockWidth() * config.getSlideValidatePercent()) {
            return false;
        }
        return true;
    }

    /**
     * 获取抠图滑块宽度
     *
     * @return 抠图滑块宽度
     */
    private int getBlockWidth() {
        return getBufferedImage(config.getBlockImageDir()).getWidth();
    }

    /**
     * 根据模板切图
     */
    private CaptchaBaseBo pictureTemplatesCut(BufferedImage originalImage, BufferedImage blockImage) {
        try {
            BlockPuzzleCaptchaBo dataBo = new BlockPuzzleCaptchaBo();
            int originalWidth = originalImage.getWidth();
            int originalHeight = originalImage.getHeight();
            int blockWidth = blockImage.getWidth();
            int blockHeight = blockImage.getHeight();

            //X轴距离右端targetWidth  Y轴距离底部targetHeight以上
            int xMargin = blockWidth / 2;
            int yMargin = blockHeight / 2;
            int widthRandom = RandomUtils.getRandomRange(blockWidth + xMargin, originalWidth - blockWidth - xMargin);
            int heightRandom = RandomUtils.getRandomRange(yMargin, originalHeight - blockHeight - yMargin);

            int[][] templateData = ImageProcessUtil.getImagePixelData(blockImage);
            originalImage = copyOriImage(originalImage);

            blockImage = new BufferedImage(blockImage.getWidth(), originalImage.getHeight(), BufferedImage.TYPE_4BYTE_ABGR);
            cutByTemplate(originalImage, blockImage, templateData, widthRandom, heightRandom);

            blockImage = ImageProcessUtil.addShadow(blockImage, 2.0f, -1.3f, -1.3f, 1f, Color.BLACK.getRGB());
            originalImage = ImageProcessUtil.addShadow(originalImage, 2.0f, -1.3f, -1.3f, 1f, Color.BLACK.getRGB());

            //设置结果集
            ImageBo jigsawImageBo = new ImageBo();
            jigsawImageBo.setWidth(blockImage.getWidth());
            jigsawImageBo.setHeight(blockImage.getHeight());
            jigsawImageBo.setImage(getImageUrl(blockImage, uploadUtil, "png"));
            ImageBo originImageBo = new ImageBo();
            originImageBo.setWidth(originalImage.getWidth());
            originImageBo.setHeight(originalImage.getHeight());
            originImageBo.setImage(getImageUrl(originalImage, uploadUtil, "png"));

            dataBo.setJigsawImage(jigsawImageBo);
            dataBo.setOriginalImage(originImageBo);
            dataBo.setDistance((double) widthRandom);
            return dataBo;
        } catch (Exception e) {
            log.error("模板切图异常！", e);
            throw new PassportBizException(ErrorCodeEnum.GLOBAL_ERROR.getCode(), "模板切图异常！");
        }
    }


    /**
     * 生成抠图后背景图
     *
     * @param oriImage     源背景图
     * @param blockImage   抠图滑块
     * @param templateData 抠图模板
     * @param x            滑块横坐标
     * @param y            滑块纵坐标
     * @return 生成抠图后背景图
     */
    private static void cutByTemplate(BufferedImage oriImage, BufferedImage blockImage, int[][] templateData, int x, int y) {
        for (int i = 0; i < templateData.length; i++) {
            for (int j = 0; j < templateData[0].length; j++) {
                int rgb = templateData[i][j];
                if (rgb != Color.WHITE.getRGB() && rgb <= 0) {
                    // 滑块复制源图
                    int rgbOri = oriImage.getRGB(x + i, y + j);
                    blockImage.setRGB(i, y + j, rgbOri);
                    // 源图(x+i,y+j)坐标透明处理
                    int r = (0xff & rgbOri);
                    int g = (0xff & (rgbOri >> 8));
                    int b = (0xff & (rgbOri >> 16));
                    rgbOri = r + (g << 8) + (b << 16) + (15 << 24);
                    oriImage.setRGB(x + i, y + j, rgbOri);
                }
            }
        }
    }

    /**
     * 获取不透明源图拷贝
     *
     * @param oriImage 源图
     * @return 不透明源图拷贝
     */
    private static BufferedImage copyOriImage(BufferedImage oriImage) {
        BufferedImage copyImage = new BufferedImage(oriImage.getWidth(), oriImage.getHeight(), BufferedImage.TYPE_4BYTE_ABGR);
        for (int i = 0; i < oriImage.getWidth(); i++) {
            for (int j = 0; j < oriImage.getHeight(); j++) {
                int rgb = oriImage.getRGB(i, j);
                int r = (0xff & rgb);
                int g = (0xff & (rgb >> 8));
                int b = (0xff & (rgb >> 16));
                //源图不透明处理
                rgb = r + (g << 8) + (b << 16) + (255 << 24);
                copyImage.setRGB(i, j, rgb);
            }
        }
        return copyImage;
    }
}

CaptchaConfig.java

package com.central.user.config;

import lombok.Getter;
import lombok.Setter;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.context.annotation.Configuration;

/**
 * @author jsf
 * @description: 行为验证码配置类
 * @date 2019/10/14 14:11
 */
@Configuration
@RefreshScope
@Setter
@Getter
public class CaptchaConfig {

    /**
     * 是否打开行为验证码
     */
    @Value("${captcha.switch.isOpenCaptcha}")
    private boolean isOpenCaptcha;

    /**
     * 是否发送验证码
     */
    @Value("${captcha.switch.isSendCode}")
    private boolean isSendCode;

    /**
     * 是否返回验证码数据
     */
    @Value("${captcha.switch.isTest}")
    private boolean isTest;

    /**
     * 滑块图片目录
     */
    @Value("${captcha.image.jigsawDir}")
    private String jigsawDir;

    /**
     * 点选底图目录
     */
    @Value("${captcha.image.clickImageDir}")
    private String clickImageDir;

    /**
     * 抠图滑块图片目录
     */
    @Value("${captcha.image.blockImageDir}")
    private String blockImageDir;

    /**
     * 字体路径
     */
    @Value("${captcha.font.path}")
    private String fontPath;

    /**
     * 滑动验证码校验精度
     */
    @Value("${captcha.validate.slide}")
    private double slideValidatePercent;

    /**
     * 点选验证码校验精度
     */
    @Value("${captcha.validate.click}")
    private double clickValidatePercent;
}

ClickWordCaptchaServiceImpl.java

package com.central.user.service.impl;

import com.central.user.bo.CaptchaBaseBo;
import com.central.user.bo.CaptchaCheckBo;
import com.central.user.bo.ClickWordCaptchaBo;
import com.central.user.bo.ImageBo;
import com.central.user.config.CaptchaConfig;
import com.central.user.utils.FontUtil;
import com.central.user.utils.RandomUtils;
import com.central.user.utils.UploadUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.annotation.PostConstruct;
import java.awt.*;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.util.*;
import java.util.List;

/**
 * @author jsf
 * @description: 点选文字验证码
 * @date 2019/10/8 19:40
 */
@Service
@Slf4j
public class ClickWordCaptchaServiceImpl extends AbstractCaptchaService {
    /**
     * 点选文字
     */
    private final static String CHINESE_WORD = "\u7684\u4e00\u4e86\u662f\u6211\u4e0d\u5728\u4eba\u4eec\u6709\u6765\u4ed6\u8fd9\u4e0a\u7740\u4e2a\u5730\u5230\u5927\u91cc\u8bf4\u5c31\u53bb\u5b50\u5f97\u4e5f\u548c\u90a3\u8981\u4e0b\u770b\u5929\u65f6\u8fc7\u51fa\u5c0f\u4e48\u8d77\u4f60\u90fd\u628a\u597d\u8fd8\u591a\u6ca1\u4e3a\u53c8\u53ef\u5bb6\u5b66\u53ea\u4ee5\u4e3b\u4f1a\u6837\u5e74\u60f3\u751f\u540c\u8001\u4e2d\u5341\u4ece\u81ea\u9762\u524d\u5934\u9053\u5b83\u540e\u7136\u8d70\u5f88\u50cf\u89c1\u4e24\u7528\u5979\u56fd\u52a8\u8fdb\u6210\u56de\u4ec0\u8fb9\u4f5c\u5bf9\u5f00\u800c\u5df1\u4e9b\u73b0\u5c71\u6c11\u5019\u7ecf\u53d1\u5de5\u5411\u4e8b\u547d\u7ed9\u957f\u6c34\u51e0\u4e49\u4e09\u58f0\u4e8e\u9ad8\u624b\u77e5\u7406\u773c\u5fd7\u70b9\u5fc3\u6218\u4e8c\u95ee\u4f46\u8eab\u65b9\u5b9e\u5403\u505a\u53eb\u5f53\u4f4f\u542c\u9769\u6253\u5462\u771f\u5168\u624d\u56db\u5df2\u6240\u654c\u4e4b\u6700\u5149\u4ea7\u60c5\u8def\u5206\u603b\u6761\u767d\u8bdd\u4e1c\u5e2d\u6b21\u4eb2\u5982\u88ab\u82b1\u53e3\u653e\u513f\u5e38\u6c14\u4e94\u7b2c\u4f7f\u5199\u519b\u5427\u6587\u8fd0\u518d\u679c\u600e\u5b9a\u8bb8\u5feb\u660e\u884c\u56e0\u522b\u98de\u5916\u6811\u7269\u6d3b\u90e8\u95e8\u65e0\u5f80\u8239\u671b\u65b0\u5e26\u961f\u5148\u529b\u5b8c\u5374\u7ad9\u4ee3\u5458\u673a\u66f4\u4e5d\u60a8\u6bcf\u98ce\u7ea7\u8ddf\u7b11\u554a\u5b69\u4e07\u5c11\u76f4\u610f\u591c\u6bd4\u9636\u8fde\u8f66\u91cd\u4fbf\u6597\u9a6c\u54ea\u5316\u592a\u6307\u53d8\u793e\u4f3c\u58eb\u8005\u5e72\u77f3\u6ee1\u65e5\u51b3\u767e\u539f\u62ff\u7fa4\u7a76\u5404\u516d\u672c\u601d\u89e3\u7acb\u6cb3\u6751\u516b\u96be\u65e9\u8bba\u5417\u6839\u5171\u8ba9\u76f8\u7814\u4eca\u5176\u4e66\u5750\u63a5\u5e94\u5173\u4fe1\u89c9\u6b65\u53cd\u5904\u8bb0\u5c06\u5343\u627e\u4e89\u9886\u6216\u5e08\u7ed3\u5757\u8dd1\u8c01\u8349\u8d8a\u5b57\u52a0\u811a\u7d27\u7231\u7b49\u4e60\u9635\u6015\u6708\u9752\u534a\u706b\u6cd5\u9898\u5efa\u8d76\u4f4d\u5531\u6d77\u4e03\u5973\u4efb\u4ef6\u611f\u51c6\u5f20\u56e2\u5c4b\u79bb\u8272\u8138\u7247\u79d1\u5012\u775b\u5229\u4e16\u521a\u4e14\u7531\u9001\u5207\u661f\u5bfc\u665a\u8868\u591f\u6574\u8ba4\u54cd\u96ea\u6d41\u672a\u573a\u8be5\u5e76\u5e95\u6df1\u523b\u5e73\u4f1f\u5fd9\u63d0\u786e\u8fd1\u4eae\u8f7b\u8bb2\u519c\u53e4\u9ed1\u544a\u754c\u62c9\u540d\u5440\u571f\u6e05\u9633\u7167\u529e\u53f2\u6539\u5386\u8f6c\u753b\u9020\u5634\u6b64\u6cbb\u5317\u5fc5\u670d\u96e8\u7a7f\u5185\u8bc6\u9a8c\u4f20\u4e1a\u83dc\u722c\u7761\u5174\u5f62\u91cf\u54b1\u89c2\u82e6\u4f53\u4f17\u901a\u51b2\u5408\u7834\u53cb\u5ea6\u672f\u996d\u516c\u65c1\u623f\u6781\u5357\u67aa\u8bfb\u6c99\u5c81\u7ebf\u91ce\u575a\u7a7a\u6536\u7b97\u81f3\u653f\u57ce\u52b3\u843d\u94b1\u7279\u56f4\u5f1f\u80dc\u6559\u70ed\u5c55\u5305\u6b4c\u7c7b\u6e10\u5f3a\u6570\u4e61\u547c\u6027\u97f3\u7b54\u54e5\u9645\u65e7\u795e\u5ea7\u7ae0\u5e2e\u5566\u53d7\u7cfb\u4ee4\u8df3\u975e\u4f55\u725b\u53d6\u5165\u5cb8\u6562\u6389\u5ffd\u79cd\u88c5\u9876\u6025\u6797\u505c\u606f\u53e5\u533a\u8863\u822c\u62a5\u53f6\u538b\u6162\u53d4\u80cc\u7ec6";

    /**
     * 点选文字大小
     */
    private final static int CHINESE_WORD_SIZE = 30;

    /**
     * 点选文字 字体总个数
     */
    private final static int WORD_TOTAL_COUNT = 4;

    /**
     * 点选文字 字体颜色是否随机
     */
    private final boolean FONT_COLOR_RANDOM = Boolean.TRUE;

    /**
     * 字体
     */
    private Font font;

    @Autowired
    private CaptchaConfig config;

    @Autowired
    private UploadUtil uploadUtil;

    @PostConstruct
    public void init() {
        log.info("点选验证码->读取字体开始");
        long start = System.currentTimeMillis();
        font = FontUtil.getFont(config.getFontPath(), Font.BOLD, CHINESE_WORD_SIZE);
        long end = System.currentTimeMillis();
        log.info("点选验证码->读取字体结束,耗时：{}", end - start);

        //初始化图片数组
        initImageCache(config.getClickImageDir());
    }

    @Override
    public CaptchaBaseBo createCaptcha() {
        BufferedImage bufferedImage = getBufferedImage(config.getClickImageDir());
        return getImageData(bufferedImage);
    }

    @Override
    public boolean verification(CaptchaCheckBo checkBo) {
        List<Point> pointList = checkBo.getPointList();
        List<Point> userPointList = checkBo.getRawPointList();
        if (pointList == null
                || userPointList == null
                || pointList.size() == 0
                || pointList.size() != userPointList.size()) {
            log.error("点选文字验证码坐标信息为空或者不相等，pointList:{},userPointList:{}", pointList, userPointList);
            return false;
        }
        log.info("点选验证码检验精度: {}" , config.getClickValidatePercent());
        for (int i = 0; i < pointList.size(); i++) {
            Point p1 = pointList.get(i);
            Point p2 = userPointList.get(i);
            //两点之间距离
            double distance = Math.sqrt(Math.abs((p1.getX() - p2.getX()) * (p1.getX() - p2.getX()) +
                    (p1.getY() - p2.getY()) * (p1.getY() - p2.getY())));
            if (distance > CHINESE_WORD_SIZE * config.getClickValidatePercent()) {
                return false;
            }
        }
        return true;
    }

    private CaptchaBaseBo getImageData(BufferedImage backgroundImage) {
        ClickWordCaptchaBo dataBo = new ClickWordCaptchaBo();
        java.util.List<String> wordList = new ArrayList<>();
        List<Point> pointList = new ArrayList<>();

        Graphics backgroundGraphics = backgroundImage.getGraphics();
        int width = backgroundImage.getWidth();
        int height = backgroundImage.getHeight();
        //定义随机1到arr.length某一个字不参与校验
        int num = RandomUtils.getRandomRange(1, WORD_TOTAL_COUNT);
        List<String> currentWords = new LinkedList<>();
        for (int i = 0; i < WORD_TOTAL_COUNT; i++) {
            String word;
            do {
                word = getRandomHan();
                currentWords.add(word);
            } while (!currentWords.contains(word));

            //随机字体坐标
            Point point = randomWordPoint(width, height, i);

            //随机字体颜色
            if (FONT_COLOR_RANDOM) {
                backgroundGraphics.setColor(new Color(RandomUtils.getRandomRange(0, 255), RandomUtils.getRandomRange(0, 255), RandomUtils.getRandomRange(0, 255)));
            } else {
                backgroundGraphics.setColor(Color.BLACK);
            }
            //设置角度
            AffineTransform affineTransform = new AffineTransform();
            affineTransform.rotate(Math.toRadians(RandomUtils.getRandomRange(20, 80)), 0, 0);
            Font rotatedFont = font.deriveFont(affineTransform);
            backgroundGraphics.setFont(rotatedFont);
            backgroundGraphics.drawString(word, (int) point.getX(), (int) point.getY());

            if ((num - 1) != i) {
                wordList.add(word);
                pointList.add(point);
            }
        }

        //创建合并图片
        BufferedImage combinedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        Graphics combinedGraphics = combinedImage.getGraphics();
        combinedGraphics.drawImage(backgroundImage, 0, 0, null);

        ImageBo originImageBo = new ImageBo();
        originImageBo.setWidth(backgroundImage.getWidth());
        originImageBo.setHeight(backgroundImage.getHeight());
        originImageBo.setImage(getImageUrl(backgroundImage, uploadUtil,"jpg"));

        dataBo.setOriginalImage(originImageBo);
        dataBo.setPointList(pointList);
        dataBo.setWordList(wordList);
        return dataBo;
    }

    /**
     * 随机字体循环排序下标
     *
     * @param imageWidth    图片宽度
     * @param imageHeight   图片高度
     * @param wordSortIndex 字体循环排序下标(i)
     * @return 随机坐标
     */
    private static Point randomWordPoint(int imageWidth, int imageHeight, int wordSortIndex) {
        int avgWidth = imageWidth / (WORD_TOTAL_COUNT + 1);
        int halfFontSize = CHINESE_WORD_SIZE / 2;
        int x, y;
        if (avgWidth < CHINESE_WORD_SIZE) {
            x = RandomUtils.getRandomRange(1, imageWidth);
        } else {
            x = RandomUtils.getRandomRange(halfFontSize + avgWidth * wordSortIndex, avgWidth * (wordSortIndex + 1) - halfFontSize);
        }
        y = RandomUtils.getRandomRange(CHINESE_WORD_SIZE, imageHeight - CHINESE_WORD_SIZE);
        return new Point(x, y);
    }

    /**
     * 获取随机中文
     * @return 随机汉字
     */
    private static String getRandomHan() {
        return CHINESE_WORD.charAt(new Random().nextInt(CHINESE_WORD.length() + 1)) + "";
    }
}