struts2配置拦截器栈要包含默认拦截器defaultStack，否则参数取不到

配置拦截器栈

 

 

        <interceptors>
            <interceptor name="sessionout" class="com.yunnan.taikang.interceptor.SessionInterceptor" />
            <interceptor-stack name="interceptorstack">
                <interceptor-ref name="defaultStack" />
                <interceptor-ref name="sessionout" />
            </interceptor-stack>
        </interceptors>