why springmvc show exception:org.apache.shiro.spring.web.config.ShiroWebFilterConfiguration Unsatisfied dependency expressed through field 'filterMap';

[????????]

2020-07-07 17:06:56,149 ERROR [org.springframework.web.context.ContextLoader] - 
Context initialization failed 
org.springframework.beans.factory.UnsatisfiedDependencyException: Error 
creating bean with name 
'org.apache.shiro.spring.web.config.ShiroWebFilterConfiguration': Unsatisfied 
dependency expressed through field 'filterMap'; nested exception is 
org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying 
bean of type 'java.util.Map<java.lang.String, javax.servlet.Filter&gt;' 
available: expected at least 1 bean which qualifies as autowire candidate. 
Dependency annotations: 
{@org.springframework.beans.factory.annotation.Autowired(required=true)}
        at 
org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:643)



why??thank you !