java.lang.ClassNotFoundException: com.jf?报错

@JFinal 你好，想跟你请教个问题：老大，报错啊。“java.lang.ClassNotFoundException: com.jfinal.core.JFinalFilter”

<filter>
<filter-name>jfinal</filter-name>
<filter-class>com.jfinal.core.JFinalFilter</filter-class>
<init-param>
<param-name>configClass</param-name>
<param-value>com.ramnight.config.MainConfig</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>jfinal</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

jar包已经用gradle引进来了啊。