紧急 Exception starting filter springSecurityFilterChain org.springframework.beans.factory.NoSuchBeanD
严重 Exception starting filter springSecurityFilterChain org.springframework.beans.factory.NoSuchBeanD
严重: Exception starting filter springSecurityFilterChain org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'springSecurityFilterChain' is defined
这是因为spring配置文件中配置的不对（改了包名，而配置文件中的配置还没改，所有出现了错）