plugins/rest/src/main/resources/struts-plugin.xml

<?xml version="1.0" encoding="UTF-8" ?>
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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
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-->
<!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
        "https://struts.apache.org/dtds/struts-2.5.dtd">

<struts>

    <bean type="com.opensymphony.xwork2.ActionProxyFactory" name="rest" class="org.apache.struts2.rest.RestActionProxyFactory" />
	<bean type="org.apache.struts2.dispatcher.mapper.ActionMapper" name="rest" class="org.apache.struts2.rest.RestActionMapper" />

	<bean type="org.apache.struts2.rest.ContentTypeHandlerManager" class="org.apache.struts2.rest.DefaultContentTypeHandlerManager" />

    <bean type="org.apache.struts2.rest.handler.ContentTypeHandler" name="xml" class="org.apache.struts2.rest.handler.JacksonXmlHandler" />
    <bean type="org.apache.struts2.rest.handler.ContentTypeHandler" name="json" class="org.apache.struts2.rest.handler.JacksonJsonHandler" />
    <bean type="org.apache.struts2.rest.handler.ContentTypeHandler" name="html" class="org.apache.struts2.rest.handler.HtmlHandler" />
    <bean type="org.apache.struts2.rest.handler.ContentTypeHandler" name="x-www-form-urlencoded" class="org.apache.struts2.rest.handler.FormUrlEncodedHandler" />
    <bean type="org.apache.struts2.rest.handler.ContentTypeHandler" name="multipart/form-data" class="org.apache.struts2.rest.handler.MultipartFormDataHandler" />

    <constant name="struts.actionProxyFactory" value="rest" />
    <constant name="struts.rest.defaultExtension" value="xhtml" />
    <constant name="struts.rest.logger" value="true" />
    <constant name="struts.rest.defaultErrorResultName" value="default-error" />
    <constant name="struts.mapper.class" value="rest" />
    <constant name="struts.mapper.idParameterName" value="id" />
    <constant name="struts.action.extension" value="xhtml,,xml,json" />

    <package name="rest-default" extends="struts-default">
        <result-types>
            <result-type name="redirect" class="org.apache.struts2.result.ServletRedirectResult">
                <param name="statusCode">303</param>
            </result-type>
            <result-type name="redirectAction" class="org.apache.struts2.result.ServletActionRedirectResult">
                <param name="statusCode">303</param>
            </result-type>
        </result-types>

        <interceptors>
            <interceptor name="rest" class="org.apache.struts2.rest.ContentTypeInterceptor"/>
            <interceptor name="restWorkflow" class="org.apache.struts2.rest.RestWorkflowInterceptor"/>
            <interceptor name="messages" class="org.apache.struts2.interceptor.MessageStoreInterceptor" />

            <!-- A complete stack with all the common interceptors in place.
                 Generally, this stack should be the one you use, though it
                 may do more than you need. Also, the ordering can be
                 switched around (ex: if you wish to have your servlet-related
                 objects applied before prepare() is called, you'd need to move
                 servletConfig interceptor up.

                 This stack also excludes from the normal validation and workflow
                 the method names input, back, and cancel. These typically are
                 associated with requests that should not be validated.
                 -->
            <interceptor-stack name="restDefaultStack">
                <interceptor-ref name="exception"/>
                <interceptor-ref name="alias"/>
                <interceptor-ref name="servletConfig"/>
                <interceptor-ref name="messages">
                    <param name="operationMode">AUTOMATIC</param>
                </interceptor-ref>
                <interceptor-ref name="prepare"/>
                <interceptor-ref name="i18n"/>
                <interceptor-ref name="chain"/>
                <interceptor-ref name="debugging"/>
                <interceptor-ref name="actionMappingParams"/>
                <interceptor-ref name="scopedModelDriven"/>
                <interceptor-ref name="modelDriven">
                    <param name="refreshModelBeforeResult">true</param>
                </interceptor-ref>
                <interceptor-ref name="fileUpload"/>
                <interceptor-ref name="checkbox"/>
                <interceptor-ref name="staticParams"/>
                <interceptor-ref name="params"/>
                <interceptor-ref name="rest" />
                <interceptor-ref name="conversionError"/>
                <interceptor-ref name="validation">
                    <param name="excludeMethods">input,back,cancel,browse,index,show,edit,editNew</param>
                </interceptor-ref>
                <interceptor-ref name="restWorkflow">
                    <param name="excludeMethods">input,back,cancel,browse,index,show,edit,editNew</param>
                </interceptor-ref>
            </interceptor-stack>

        </interceptors>

        <default-interceptor-ref name="restDefaultStack"/>

        <default-class-ref class="org.apache.struts2.rest.RestActionSupport"/>

        <global-allowed-methods>execute,input,back,cancel,browse,save,delete,list,index,show,create,update,destroy,edit,editNew</global-allowed-methods>

    </package>

</struts>