关于javax.servlet.ServletException: java.lang.IllegalStateException: No WebEnvironment found: no Envir

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关于配置shiro出现如下错误

javax.servlet.ServletException: java.lang.IllegalStateException: No WebEnvironment found: no EnvironmentLoaderListener registered?
at org.apache.shiro.web.servlet.AbstractFilter.init(AbstractFilter.java:105)
at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:279)
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:260)
at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:105)
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4615)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5222)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1399)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalStateException: No WebEnvironment found: no EnvironmentLoaderListener registered?
at org.apache.shiro.web.util.WebUtils.getRequiredWebEnvironment(WebUtils.java:276)
at org.apache.shiro.web.servlet.ShiroFilter.init(ShiroFilter.java:73)
at org.apache.shiro.web.servlet.AbstractShiroFilter.onFilterConfigSet(AbstractShiroFilter.java:152)
at org.apache.shiro.web.servlet.AbstractFilter.init(AbstractFilter.java:97)
... 12 more

解决办法，在web.xml中添加

<listener>
<listener-class>org.apache.shiro.web.env.EnvironmentLoaderListener</listener-class>
</listener>

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