<dependency>
    <groupId>com.github.whvcse</groupId>
    <artifactId>easy-captcha</artifactId>
    <version>1.6.2</version>
</dependency>

@Configuration
@Data
public class EasyCaptchaConfig {
    /**
     * 驗證碼類型
     */
    private EasyCaptchaTypeEnum type = EasyCaptchaTypeEnum.GIF;
    /**
     * 驗證碼緩存過期時間(單位:秒)
     */
    private long ttl = 120L;
    /**
     * 驗證碼內容長度
     */
    private int length = 4;
    /**
     * 驗證碼寬度
     */
    private int width = 120;
    /**
     * 驗證碼高度
     */
    private int height = 36;
    /**
     * 驗證碼字體
     */
    private String fontName = "Verdana";
    /**
     * 字體風格
     */
    private Integer fontStyle = Font.PLAIN;
    /**
     * 字體大小
     */
    private int fontSize = 20;
}

/**
 * @desc: EasyCaptcha 驗證碼類型枚舉
 * @author: shy
 * @date: 2025/02/27 16:55
 */
public enum EasyCaptchaTypeEnum {
    /**
     * 算數(shù)
     */
    ARITHMETIC,
    /**
     * 中文
     */
    CHINESE,
    /**
     * 中文閃圖
     */
    CHINESE_GIF,
    /**
     * 閃圖
     */
    GIF,
    /**
     * png格式驗證碼
     */
    SPEC
}

/**
 * @desc: 驗證碼生成器
 * @author: shy
 * @date: 2025/02/27 16:59
 */
@Component
@RequiredArgsConstructor
public class EasyCaptchaProducer {
    private final EasyCaptchaConfig captchaConfig;
    public Captcha getCaptcha() {
        Captcha captcha;
        int width = captchaConfig.getWidth();
        int height = captchaConfig.getHeight();
        int length = captchaConfig.getLength();
        String fontName = captchaConfig.getFontName();
        switch (captchaConfig.getType()) {
            case ARITHMETIC:
                captcha = new ArithmeticCaptcha(width, height);
                //固定設置為兩位，圖片為算數(shù)運算表達式
                captcha.setLen(2);
                break;
            case CHINESE:
                captcha = new ChineseCaptcha(width, height);
                captcha.setLen(length);
                break;
            case CHINESE_GIF:
                captcha = new ChineseGifCaptcha(width, height);
                captcha.setLen(length);
                break;
            case GIF:
                captcha = new GifCaptcha(width, height);//最后一位是位數(shù)
                captcha.setLen(length);
                break;
            case SPEC:
                captcha = new SpecCaptcha(width, height);
                captcha.setLen(length);
                break;
            default:
                throw new RuntimeException("驗證碼配置信息錯誤！正確配置查看 CaptchaTypeEnum ");
        }
        // 使用默認字體即可解決中文亂碼問題
        captcha.setFont(new Font(fontName, captchaConfig.getFontStyle(), captchaConfig.getFontSize()));
        return captcha;
    }
}

/**
 * @desc: EasyCaptcha 業(yè)務類
 * @author: shy
 * @date: 2025/02/27 17:02
 */
@Component
@RequiredArgsConstructor
public class EasyCaptchaService {
    private final EasyCaptchaProducer easyCaptchaProducer;
    private final EasyCaptchaConfig captchaConfig;
    /**
     * 獲取EasyCaptcha圖片驗證碼
     *
     * @param
     * @return Captcha
     * @throws
     * @author shy
     * @date 2025/02/27 22:18
     */
    public Captcha getCaptcha() {
        // 獲取驗證碼
        Captcha captcha = easyCaptchaProducer.getCaptcha();
        // 驗證碼文本
        String captchaText = captcha.text();
        // todo 驗證碼文本存儲Redis比對
        System.out.println("驗證碼文本：" + captchaText);
        return captcha;
    }
}

@GetMapping("/getEasyCaptcha")
@ApiOperation(value = "獲取EasyCaptcha圖片驗證碼", notes = "獲取EasyCaptcha圖片驗證碼", httpMethod = "GET")
public void getEasyCaptcha() {
    Captcha captcha = captchaService.getCaptcha();
    try {
        captcha.out(response.getOutputStream());
        // 以上兩種方式都可以輸出圖片驗證碼
        //CaptchaUtil.out(captcha, request, response);
    } catch (IOException e) {
        throw new RuntimeException();
    }
    super.getEasyCaptcha();
}