struts2-uel-plugin/src/main/resources/struts-plugin.xml

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
        "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
    <bean type="com.opensymphony.xwork2.util.ValueStackFactory" name="uel"
          class="org.apache.struts2.uelplugin.UELValueStackFactory"/>
    <bean type="com.opensymphony.xwork2.util.reflection.ReflectionProvider" name="uel"
          class="org.apache.struts2.uelplugin.reflection.GenericReflectionProvider"/>
    <bean type="com.opensymphony.xwork2.util.reflection.ReflectionContextFactory" name="uel"
          class="org.apache.struts2.uelplugin.UELReflectionContextFactory"/>

    <constant name="struts.valueStackFactory" value="uel"/>
    <constant name="struts.reflectionProvider" value="uel"/>
    <constant name="struts.reflectionContextFactory" value="uel"/>

    <package name="uel-default" extends="struts-default" abstract="true">
        <interceptors>
            <interceptor-stack name="uelStack">
                <interceptor-ref name="exception"/>
                <interceptor-ref name="alias"/>
                <interceptor-ref name="servletConfig"/>
                <interceptor-ref name="i18n"/>
                <interceptor-ref name="prepare"/>
                <interceptor-ref name="chain"/>
                <interceptor-ref name="debugging"/>
                <interceptor-ref name="scopedModelDriven"/>
                <interceptor-ref name="modelDriven"/>
                <interceptor-ref name="fileUpload"/>
                <interceptor-ref name="checkbox"/>
                <interceptor-ref name="multiselect"/>
                <interceptor-ref name="staticParams"/>
                <interceptor-ref name="actionMappingParams"/>
                <interceptor-ref name="params">
                    <param name="excludeParams">dojo\..*,^struts\..*</param>
                    <param name="acceptParamNames">[[\p{Graph}\s]&amp;&amp;[^:=]]*</param>
                </interceptor-ref>
                <interceptor-ref name="conversionError"/>
                <interceptor-ref name="validation">
                    <param name="excludeMethods">input,back,cancel,browse</param>
                </interceptor-ref>
                <interceptor-ref name="workflow">
                    <param name="excludeMethods">input,back,cancel,browse</param>
                </interceptor-ref>
            </interceptor-stack>
        </interceptors>
        <default-interceptor-ref name="uelStack"/>
    </package>
</struts>