<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
<!-- classpath:db.properties -->
<!-- classpath:main-config.xml -->
<!-- classpath:config/fweb-archetype-mvc.xml -->
classpath:config/fweb-shiro-mvc.xml
</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<filter>
<filter-name>shiroFilter</filter-name>
<filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
<!-- 设置true由servlet容器控制filter的生命周期 -->
<init-param>
<param-name>targetFilterLifecycle</param-name>
<param-value>true</param-value>
</init-param>
<!-- 设置spring容器filter的bean id,如果不设置则找与filter-name一致的bean-->
<init-param>
<param-name>targetBeanName</param-name>
<param-value>shiroFilter</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>shiroFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
把上面的配置全部通过java方式配置要如何写