参考文档：集成aj-captcha实现滑块验证码 (opens new window)

以下是原来的替换掉

ruoyi-framework/pom.xml

 <!-- 验证码 -->
  <dependency>
      <groupId>pro.fessional</groupId>
      <artifactId>kaptcha</artifactId>
      <exclusions>
          <exclusion>
              <artifactId>javax.servlet-api</artifactId>
              <groupId>javax.servlet</groupId>
          </exclusion>
      </exclusions>
  </dependency>