The parameters of spring MVC receiving get requests are not necessarily garbled

tomcat 8.xx Before the encoding default is iso After the encoding default is utf-8

Spring MVC receives post requests without coding rules, so it will be garbled

    web.xml   add CharacterEncodingFilter

      <filter>
        <filter-name>charset</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>charset</filter-name>
        <url-pattern>/*</url-pattern>
      </filter-mapping>