shiro整合spring求指点这个异常：
2013-12-11 18:15:08 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet springMVC threw exception
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'shiroFilter': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalArgumentException: There is no filter with name 'auth' to apply to chain [/**] in the pool of available Filters.  Ensure a filter with that name/path has first been registered with the addFilter method(s).
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:149)
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:102)
at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1441)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:248)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1097)
at org.springframework.web.filter.DelegatingFilterProxy.initDelegate(DelegatingFilterProxy.java:326)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:253)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:877)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:594)
at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1675)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.IllegalArgumentException: There is no filter with name 'auth' to apply to chain [/**] in the pool of available Filters.  Ensure a filter with that name/path has first been registered with the addFilter method(s).
at org.apache.shiro.web.filter.mgt.DefaultFilterChainManager.addToChain(DefaultFilterChainManager.java:265)
at org.apache.shiro.web.filter.mgt.DefaultFilterChainManager.createChain(DefaultFilterChainManager.java:148)
at org.apache.shiro.spring.web.ShiroFilterFactoryBean.createFilterChainManager