Springmvc配置DispatcherServlet

我想将后缀为html和htm的请求过滤到Springmvc该怎么写，为什么这样写不行
*.htm（l？）

 <servlet>
        <servlet-name>spring-mvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring-servlet.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>spring-mvc</servlet-name>
        <url-pattern>*.html</url-pattern>
    </servlet-mapping>

 <servlet-mapping>
    <servlet-name>spring-mvc</servlet-name>
    <url-pattern>*.html</url-pattern>
          <url-pattern>*.htm</url-pattern>
</servlet-mapping>

这样就行了

spring-mvc
org.springframework.web.servlet.DispatcherServlet

contextConfigLocation
classpath:spring-servlet.xml

1

<servlet-mapping>
    <servlet-name>spring-mvc</servlet-name>
    <url-pattern>*.html</url-pattern>
</servlet-mapping>
        <servlet-mapping>
    <servlet-name>spring-mvc</servlet-name>
    <url-pattern>*.htm</url-pattern>
</servlet-mapping>
    这样子应该可以拦截