Spring MVC乱码

用spring提供的过虑器,在web.xml里加
<filter>  
  <filter-name>Set Character Encoding</filter-name>  
  <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>  
  <init-param>  
  <param-name>encoding</param-name>  
  <param-value>utf8</param-value>  
  </init-param>  
</filter>  
<filter-mapping>  
  <filter-name>Set Character Encoding</filter-name>  
  <url-pattern>/*</url-pattern>  
</filter-mapping>