若依改用EasyCaptcha验证码

若依自带的验证码样式比较单一，所以想改用EasyCaptcha验证码，另外EasyCaptcha算术验证码可能会有负数，输入时需要写负号，比较麻烦，所以使用一个简单的方法过滤掉负数结果

原本的验证码依赖和代码可删可不删，注释掉即可

在父模块添加依赖

xml 复制代码

<properties>
	<captcha.version>1.6.2</captcha.version>
</properties>

<dependencyManagement>
	 <dependencies>
<!-- EasyCaptcha验证码依赖  -->
		<dependency>
       			 <groupId>com.github.whvcse</groupId>
      		           <artifactId>easy-captcha</artifactId>
        		 <version>${captcha.version}</version>
		</dependency>
	</dependencies>
</dependencyManagement>

ruoyi-admin模块中添加依赖

xml 复制代码

<!-- 验证码 -->
<dependency>
    <groupId>com.github.whvcse</groupId>
    <artifactId>easy-captcha</artifactId>
</dependency>

找到CaptchaController,java，修改getCode方法

java 复制代码

public AjaxResult getCode(HttpServletResponse response) throws IOException, FontFormatException {
        AjaxResult ajax = AjaxResult.success();
        boolean captchaEnabled = configService.selectCaptchaEnabled();
        ajax.put("captchaEnabled", captchaEnabled);
        if (!captchaEnabled)
        {
            return ajax;
        }

        // 保存验证码信息
        String uuid = IdUtils.simpleUUID();
        String verifyKey = CacheConstants.CAPTCHA_CODE_KEY + uuid;
     
        //新验证码
        //图形验证码
        //SpecCaptcha captcha = new SpecCaptcha(130, 48, 4);
        //算术验证码
        ArithmeticCaptcha captcha;
        String code;

        captcha = new ArithmeticCaptcha(130, 48);
        //得到验证码的值
        code = captcha.text();
        //若为负数则重新生成
        int i = Integer.parseInt(code);
        while (i < 0){
            System.out.println("code = " + code + "，负数，重新生成！！！！！！！！");
            captcha = new ArithmeticCaptcha(130, 48);
            code = captcha.text();
            i = Integer.parseInt(code);
            System.out.println("i = " + i + "，新值！！！");
        }
        // 设置内置字体
        captcha.setFont(Captcha.FONT_1);
        //captcha.setLen(2);  // 几位数运算，默认是两位
        //captcha.getArithmeticString();  // 获取运算的公式
        //存入redis
        redisCache.setCacheObject(verifyKey, code, Constants.CAPTCHA_EXPIRATION, TimeUnit.MINUTES);

       //旧验证码
        //String capStr = null, code = null;
        //BufferedImage image = null;
        //
        //// 生成验证码
        //String captchaType = RuoYiConfig.getCaptchaType();
        //if ("math".equals(captchaType))
        //{
        //    String capText = captchaProducerMath.createText();
        //    capStr = capText.substring(0, capText.lastIndexOf("@"));
        //    code = capText.substring(capText.lastIndexOf("@") + 1);
        //    image = captchaProducerMath.createImage(capStr);
        //}
        //else if ("char".equals(captchaType))
        //{
        //    capStr = code = captchaProducer.createText();
        //    image = captchaProducer.createImage(capStr);
        //}
        //
        //redisCache.setCacheObject(verifyKey, code, Constants.CAPTCHA_EXPIRATION, TimeUnit.MINUTES);
        //// 转换流信息写出
        //FastByteArrayOutputStream os = new FastByteArrayOutputStream();
        //try
        //{
        //    ImageIO.write(image, "jpg", os);
        //}
        //catch (IOException e)
        //{
        //    return AjaxResult.error(e.getMessage());
        //}

        ajax.put("uuid", uuid);
        ajax.put("img", captcha.toBase64());
        return ajax;
    }

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