web.xml配置

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