form-xml-validation/src/main/resources/struts.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
    "https://struts.apache.org/dtds/struts-2.5.dtd">

<struts>

  <constant name="struts.devMode" value="true"/>

  <package name="basicstruts2" extends="struts-default">

    <!-- If no class attribute is specified the framework will assume success and
    render the result index.jsp -->

    <default-action-ref name="index"/>

    <!-- If no name value for the result node is specified the success value is the default -->
    <action name="index">
      <result>/index.jsp</result>
    </action>

    <action name="edit" class="org.apache.struts.edit.action.EditAction" method="input">
      <result name="input">/edit.jsp</result>
    </action>

    <action name="save" class="org.apache.struts.edit.action.EditAction" method="execute">
      <result name="input">/edit.jsp</result>
      <result name="success">/thankyou.jsp</result>
    </action>

  </package>

</struts>