利用spring提供的字符编码过滤器

<!-- spring的字符集过滤器 --> 
    <filter> 
        <filter-name>Spring character encoding filter</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>Spring character encoding filter</filter-name> 
        <url-pattern>/*</url-pattern> 
    </filter-mapping>