Struts2 Error Record

1. HTTP Status 500 - The Struts dispatcher cannot be found.

   严重: Servlet.service() for servlet [jsp] in context with path [/demo-echeque-web] threw exception [The Struts dispatcher cannot be found.  This is usually caused by using Struts tags without the associated filter. Struts tags are only usable when the request has passed through its servlet filter, which initializes the Struts dispatcher needed for this tag. - [unknown location]] with root cause
   The Struts dispatcher cannot be found.  This is usually caused by using Struts tags without the associated filter. Struts tags are only usable when the request has passed through its servlet filter, which initializes the Struts dispatcher needed for this tag. - [unknown location]
   	at org.apache.struts2.views.jsp.TagUtils.getStack(TagUtils.java:60)
   	at org.apache.struts2.views.jsp.StrutsBodyTagSupport.getStack(StrutsBodyTagSupport.java:44)
   	at org.apache.struts2.views.jsp.ComponentTagSupport.doStartTag(ComponentTagSupport.java:48)
   	at org.apache.jsp.pages.welcome_jsp._jspx_meth_s_005furl_005f0(welcome_jsp.java:373)
   	at org.apache.jsp.pages.welcome_jsp._jspService(welcome_jsp.java:75)
   	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
   	at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
   	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
   	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
   	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
   	at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
   	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
   	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
   	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
   	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
   	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
   	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
   	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
   	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
   	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
   	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
   	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
   	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
   	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
   	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
   	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
   	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2441)
   	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2430)
   	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
   	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
   	at java.lang.Thread.run(Thread.java:744)

       ==> 解决办法：

   #web.xml添加
   <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>*.jsp</url-pattern>
   </filter-mapping>

    

2. test