Struts2 error!

Struts problem report

Struts has detected an unhandled exception:

Messages:

There is no Action mapped for namespace/projectinfo and action name query.

Stacktraces

There is no Action mapped for namespace/projectinfo and action name query.-[unknown location]

    com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:186)    org.apache.struts2.impl.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:41)    org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:494)    org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:419)    org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)    org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)    org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)    org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)    org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)    org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)    org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)    org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)    org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)    org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)    org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)    org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)    org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)    java.lang.Thread.run(Unknown Source)

You are seeing this page because development mode is enabled. development mode, or devmode, enables extra debugging behaviors and reports to assist developers. To disable this mode, set:

  struts.devMode=false

In yourWEB-INF/classes/struts.propertiesFile.

After using SSH + Tomcat for a long time, this problem suddenly appeared today. The answer was a lot of nonsense, and various translations...

The reason why there is no action mapped for namespace/projectinfo and action name query is: The method name in the action and the method name in the configuration file are wrong. It's really careless. Remember!

It seems that Ctrl + C/V should be used in the future to ensure that no error will occur.

Struts2 error!