When idea inserts data into the database, Chinese garbled characters appear

When adding data, Chinese garbled characters appear

when various encoding formats are useless. At this time, we add a Filter filter in the web.xml configuration file

  <filter>
        <filter-name>encoding</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>utf-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>encoding</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

Restart the Tomcat server, add data again to see if it is resolved.