java - Struts2:There is no Action mapped for namespace [/] and action name [] associated with context path -


i'm new struts2. i'm sorry i've tried different solutions suggested on stackoverflow,they didn't worked. followed these tutorial's instructions:http://www.tutorialspoint.com/struts_2/ can me?

this error:

avvertenza: not find action or result: /hellowordstrut2/hello?name=aaa there no action mapped namespace [/] , action name [hello] associated context path [/hellowordstrut2]. - [unknown location]     @ com.opensymphony.xwork2.defaultactionproxy.prepare(defaultactionproxy.java:185)     @ org.apache.struts2.impl.strutsactionproxy.prepare(strutsactionproxy.java:63)     @ org.apache.struts2.impl.strutsactionproxyfactory.createactionproxy(strutsactionproxyfactory.java:37)     @ com.opensymphony.xwork2.defaultactionproxyfactory.createactionproxy(defaultactionproxyfactory.java:58)     @ org.apache.struts2.dispatcher.dispatcher.serviceaction(dispatcher.java:554)     @ org.apache.struts2.dispatcher.ng.executeoperations.executeaction(executeoperations.java:81)     @ org.apache.struts2.dispatcher.ng.filter.strutsprepareandexecutefilter.dofilter(strutsprepareandexecutefilter.java:99)     @ org.apache.catalina.core.applicationfilterchain.internaldofilter(applicationfilterchain.java:241)     @ org.apache.catalina.core.applicationfilterchain.dofilter(applicationfilterchain.java:208)     @ org.apache.catalina.core.standardwrappervalve.invoke(standardwrappervalve.java:220)     @ org.apache.catalina.core.standardcontextvalve.invoke(standardcontextvalve.java:122)     @ org.apache.catalina.authenticator.authenticatorbase.invoke(authenticatorbase.java:505)     @ org.apache.catalina.core.standardhostvalve.invoke(standardhostvalve.java:169)     @ org.apache.catalina.valves.errorreportvalve.invoke(errorreportvalve.java:103)     @ org.apache.catalina.valves.accesslogvalve.invoke(accesslogvalve.java:956)     @ org.apache.catalina.core.standardenginevalve.invoke(standardenginevalve.java:116)     @ org.apache.catalina.connector.coyoteadapter.service(coyoteadapter.java:423)     @ org.apache.coyote.http11.abstracthttp11processor.process(abstracthttp11processor.java:1079)     @ org.apache.coyote.abstractprotocol$abstractconnectionhandler.process(abstractprotocol.java:625)     @ org.apache.tomcat.util.net.jioendpoint$socketprocessor.run(jioendpoint.java:318)     @ java.util.concurrent.threadpoolexecutor.runworker(unknown source)     @ java.util.concurrent.threadpoolexecutor$worker.run(unknown source)     @ org.apache.tomcat.util.threads.taskthread$wrappingrunnable.run(taskthread.java:61)     @ java.lang.thread.run(unknown source)

this workspace:

workspace

my struts.xml:

   <?xml version="1.0" encoding="utf-8"?> <struts> <constant name="struts.devmode" value="true" /> <package name="helloworld" extends="struts-default"> <action name="hello" class="com.tutoriaspoint.struts2.hellowordaction"         method="execute"> <result name="success">helloword.jsp</result> </action>        </package> </struts>

my web.xml:

<?xml version="1.0" encoding="utf-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"    xmlns="http://java.sun.com/xml/ns/javaee"     xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"    xsi:schemalocation="http://java.sun.com/xml/ns/javaee     http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"    id="webapp_id" version="3.0">     <display-name>struts 2</display-name>    <welcome-file-list>       <welcome-file>index.jsp</welcome-file>    </welcome-file-list>    <filter>       <filter-name>struts2</filter-name>       <filter-class>          org.apache.struts2.dispatcher.ng.filter.strutsprepareandexecutefilter       </filter-class>    </filter>     <filter-mapping>       <filter-name>struts2</filter-name>       <url-pattern>/*</url-pattern>    </filter-mapping> </web-app>

my action class:

package com.tutoriaspoint.struts2;   public class hellowordaction    {       private string name;      public string getname(){         return name;     }     public void setname(string name){         this.name=name;         }     public string execute() throws exception {         return "succes";         } }


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