SpringMVC过滤解决乱码问题

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在xml配置：

<!--过滤器-->
  <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>