【转】Struts2 result返回类型（type）小结

 

在struts2的返回结果配置中，我们大部分情况使用默认的或者chain或者redirect，其实struts2还有很多其他类型的，今天我们就来看一下都有哪些类型。

打开struts2的源码中struts-default.xml文件，我们能看到如下配置

< xmlnamespace prefix ="v" ns ="urn:schemas-microsoft-com:vml" />< xmlnamespace prefix ="o" ns ="urn:schemas-microsoft-com:office:office" />

 

 

<package name="struts-default" abstract="true">

 

        <result-types>

            <result-type name="chain"class="com.opensymphony.xwork2.ActionChainResult"/>

            <result-type name="dispatcher"class="org.apache.struts2.dispatcher.ServletDispatcherResult" default="true"/>

            <result-type name="freemarker"class="org.apache.struts2.views.freemarker.FreemarkerResult"/>

            <result-type name="httpheader"class="org.apache.struts2.dispatcher.HttpHeaderResult"/>

            <result-type name="redirect"class="org.apache.struts2.dispatcher.ServletRedirectResult"/>

            <result-type name="redirectAction"class="org.apache.struts2.dispatcher.ServletActionRedirectResult"/>

            <result-type name="stream"class="org.apache.struts2.dispatcher.StreamResult"/>

            <result-type name="velocity"class="org.apache.struts2.dispatcher.VelocityResult"/>

            <result-type name="xslt"class="org.apache.struts2.views.xslt.XSLTResult"/>

            <result-type name="plainText"class="org.apache.struts2.dispatcher.PlainTextResult" />

            <!-- Deprecated name form scheduled for removal in Struts 2.1.0. The camelCase versions are preferred. See ww-1707 -->

            <result-type name="redirect-action"class="org.apache.struts2.dispatcher.ServletActionRedirectResult"/>

            <result-type name="plaintext"class="org.apache.struts2.dispatcher.PlainTextResult" />

        </result-types>

 

类型	chain
描述	用来处理Action链，被跳转的action中仍能获取上个页面的值，如request信息。
使用的类	com.opensymphony.xwork2.ActionChainResult
类型	dispatcher
描述	用来转向页面，通常处理JSP
使用的类	org.apache.struts2.dispatcher.ServletDispatcherResult
类型	freemaker
描述	处理FreeMarker模板
使用的类	org.apache.struts2.views.freemarker.FreemarkerResult
类型	httpheader
描述	控制特殊HTTP行为的结果类型
使用的类	org.apache.struts2.dispatcher.HttpHeaderResult
类型	stream
描述	向浏览器发送InputSream对象，通常用来处理文件下载，还可用于返回AJAX数据
使用的类	org.apache.struts2.dispatcher.StreamResult
类型	velocity
描述	处理Velocity模板
使用的类	org.apache.struts2.dispatcher.VelocityResult
类型	xslt
描述	处理XML/XLST模板
使用的类	org.apache.struts2.views.xslt.XSLTResult
类型	plainText
描述	显示原始文件内容，例如文件源代码
使用的类	org.apache.struts2.dispatcher.PlainTextResult
类型	plaintext
描述	显示原始文件内容，例如文件源代码
使用的类	org.apache.struts3.dispatcher.PlainTextResult
类型	redirect
描述	重定向到一个URL ，被跳转的页面中丢失传递的信息，如request
使用的类	org.apache.struts2.dispatcher.ServletRedirectResult
类型	redirectAction
描述	重定向到一个Action ，跳转的页面中丢失传递的信息，如request
使用的类	org.apache.struts2.dispatcher.ServletActionRedirectResult
类型	redirect-action
描述	重定向到一个Action ，跳转的页面中丢失传递的信息，如request
使用的类	org.apache.struts2.dispatcher.ServletActionRedirectResult

注1：redirect与redirect-action区别

一、使用redirect需要后缀名 使用redirect-action不需要后缀名

二、type="redirect"　的值可以转到其它命名空间下的action,而redirect-action只能转到同一命名空下的 action，因此它可以省略.action的后缀直接写action的名称。

如：

<result name="success" type="redirect">yhj.do</result>

<result name="success" type="redirect-action">yhj</result>
注2：默认的<result>标签的type属性值是“dispatcher”。

附录：struts-default源码

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

<!--

/*

 * $Id: struts-default.xml 694960 2008-09-13 15:01:00Z rgielen $

 *

 * 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.

 */

-->

 

<!DOCTYPE struts PUBLIC

    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"

    "http://struts.apache.org/dtds/struts-2.0.dtd">

 

<struts>

    <bean class="com.opensymphony.xwork2.ObjectFactory" name="xwork" />

    <bean type="com.opensymphony.xwork2.ObjectFactory" name="struts"class="org.apache.struts2.impl.StrutsObjectFactory" />

 

    <bean type="com.opensymphony.xwork2.ActionProxyFactory" name="xwork"class="com.opensymphony.xwork2.DefaultActionProxyFactory"/>

    <bean type="com.opensymphony.xwork2.ActionProxyFactory" name="struts"class="org.apache.struts2.impl.StrutsActionProxyFactory"/>

 

    <bean type="com.opensymphony.xwork2.util.ObjectTypeDeterminer" name="tiger"class="com.opensymphony.xwork2.util.GenericsObjectTypeDeterminer"/>

    <bean type="com.opensymphony.xwork2.util.ObjectTypeDeterminer" name="notiger"class="com.opensymphony.xwork2.util.DefaultObjectTypeDeterminer"/>

    <bean type="com.opensymphony.xwork2.util.ObjectTypeDeterminer" name="struts"class="com.opensymphony.xwork2.util.DefaultObjectTypeDeterminer"/>

 

    <bean type="org.apache.struts2.dispatcher.mapper.ActionMapper" name="struts"class="org.apache.struts2.dispatcher.mapper.DefaultActionMapper" />

    <bean type="org.apache.struts2.dispatcher.mapper.ActionMapper" name="composite"class="org.apache.struts2.dispatcher.mapper.CompositeActionMapper" />

    <bean type="org.apache.struts2.dispatcher.mapper.ActionMapper" name="restful"class="org.apache.struts2.dispatcher.mapper.RestfulActionMapper" />

    <bean type="org.apache.struts2.dispatcher.mapper.ActionMapper" name="restful2"class="org.apache.struts2.dispatcher.mapper.Restful2ActionMapper" />

 

    <bean type="org.apache.struts2.dispatcher.multipart.MultiPartRequest"name="struts"class="org.apache.struts2.dispatcher.multipart.JakartaMultiPartRequest"scope="default" optional="true"/>

    <bean type="org.apache.struts2.dispatcher.multipart.MultiPartRequest"name="jakarta"class="org.apache.struts2.dispatcher.multipart.JakartaMultiPartRequest"scope="default" optional="true" />

 

    <bean type="org.apache.struts2.views.TagLibrary" name="s"class="org.apache.struts2.views.DefaultTagLibrary" />

 

    <bean class="org.apache.struts2.views.freemarker.FreemarkerManager"name="struts" optional="true"/>

    <bean class="org.apache.struts2.views.velocity.VelocityManager" name="struts"optional="true" />

 

    <bean class="org.apache.struts2.components.template.TemplateEngineManager" />

    <bean type="org.apache.struts2.components.template.TemplateEngine" name="ftl"class="org.apache.struts2.components.template.FreemarkerTemplateEngine" />

    <bean type="org.apache.struts2.components.template.TemplateEngine" name="vm"class="org.apache.struts2.components.template.VelocityTemplateEngine" />

    <bean type="org.apache.struts2.components.template.TemplateEngine" name="jsp"class="org.apache.struts2.components.template.JspTemplateEngine" />

 

    <bean type="com.opensymphony.xwork2.util.XWorkConverter" name="xwork1"class="com.opensymphony.xwork2.util.XWorkConverter" />

    <bean type="com.opensymphony.xwork2.util.XWorkConverter" name="struts"class="com.opensymphony.xwork2.util.AnnotationXWorkConverter" />

    <bean type="com.opensymphony.xwork2.TextProvider" name="xwork1"class="com.opensymphony.xwork2.TextProviderSupport" />

    <bean type="com.opensymphony.xwork2.TextProvider" name="struts"class="com.opensymphony.xwork2.TextProviderSupport" />

 

    <!--  Only have static injections -->

    <bean class="com.opensymphony.xwork2.ObjectFactory" static="true" />

    <bean class="com.opensymphony.xwork2.util.XWorkConverter" static="true" />

    <bean class="com.opensymphony.xwork2.util.OgnlValueStack" static="true" />

    <bean class="com.opensymphony.xwork2.validator.ValidatorFileParser"static="true" />

    <bean class="org.apache.struts2.dispatcher.Dispatcher" static="true" />

    <bean class="org.apache.struts2.components.Include" static="true" />

    <bean class="org.apache.struts2.dispatcher.FilterDispatcher" static="true" />

    <bean class="org.apache.struts2.views.util.ContextUtil" static="true" />

    <bean class="org.apache.struts2.views.util.UrlHelper" static="true" />

 

    <package name="struts-default" abstract="true">

        <result-types>

            <result-type name="chain"class="com.opensymphony.xwork2.ActionChainResult"/>

            <result-type name="dispatcher"class="org.apache.struts2.dispatcher.ServletDispatcherResult" default="true"/>

            <result-type name="freemarker"class="org.apache.struts2.views.freemarker.FreemarkerResult"/>

            <result-type name="httpheader"class="org.apache.struts2.dispatcher.HttpHeaderResult"/>

            <result-type name="redirect"class="org.apache.struts2.dispatcher.ServletRedirectResult"/>

            <result-type name="redirectAction"class="org.apache.struts2.dispatcher.ServletActionRedirectResult"/>

            <result-type name="stream"class="org.apache.struts2.dispatcher.StreamResult"/>

            <result-type name="velocity"class="org.apache.struts2.dispatcher.VelocityResult"/>

            <result-type name="xslt"class="org.apache.struts2.views.xslt.XSLTResult"/>

            <result-type name="plainText"class="org.apache.struts2.dispatcher.PlainTextResult" />

            <!-- Deprecated name form scheduled for removal in Struts 2.1.0. The camelCase versions are preferred. See ww-1707 -->

            <result-type name="redirect-action"class="org.apache.struts2.dispatcher.ServletActionRedirectResult"/>

            <result-type name="plaintext"class="org.apache.struts2.dispatcher.PlainTextResult" />

        </result-types>

 

 

        <interceptors>

            <interceptor name="alias"class="com.opensymphony.xwork2.interceptor.AliasInterceptor"/>

            <interceptor name="autowiring"class="com.opensymphony.xwork2.spring.interceptor.ActionAutowiringInterceptor"/>

            <interceptor name="chain"class="com.opensymphony.xwork2.interceptor.ChainingInterceptor"/>

            <interceptor name="conversionError"class="org.apache.struts2.interceptor.StrutsConversionErrorInterceptor"/>

            <interceptor name="cookie"class="org.apache.struts2.interceptor.CookieInterceptor"/>

            <interceptor name="createSession"class="org.apache.struts2.interceptor.CreateSessionInterceptor" />

            <interceptor name="debugging"class="org.apache.struts2.interceptor.debugging.DebuggingInterceptor" />

            <interceptor name="externalRef"class="com.opensymphony.xwork2.interceptor.ExternalReferencesInterceptor"/>

            <interceptor name="execAndWait"class="org.apache.struts2.interceptor.ExecuteAndWaitInterceptor"/>

            <interceptor name="exception"class="com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor"/>

            <interceptor name="fileUpload"class="org.apache.struts2.interceptor.FileUploadInterceptor"/>

            <interceptor name="i18n"class="com.opensymphony.xwork2.interceptor.I18nInterceptor"/>

            <interceptor name="logger"class="com.opensymphony.xwork2.interceptor.LoggingInterceptor"/>

            <interceptor name="modelDriven"class="com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor"/>

            <interceptor name="scopedModelDriven"class="com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor"/>

            <interceptor name="params"class="com.opensymphony.xwork2.interceptor.ParametersInterceptor"/>

            <interceptor name="prepare"class="com.opensymphony.xwork2.interceptor.PrepareInterceptor"/>

            <interceptor name="staticParams"class="com.opensymphony.xwork2.interceptor.StaticParametersInterceptor"/>

            <interceptor name="scope"class="org.apache.struts2.interceptor.ScopeInterceptor"/>

            <interceptor name="servletConfig"class="org.apache.struts2.interceptor.ServletConfigInterceptor"/>

            <interceptor name="sessionAutowiring"class="org.apache.struts2.spring.interceptor.SessionContextAutowiringInterceptor"/>

            <interceptor name="timer"class="com.opensymphony.xwork2.interceptor.TimerInterceptor"/>

            <interceptor name="token"class="org.apache.struts2.interceptor.TokenInterceptor"/>

            <interceptor name="tokenSession"class="org.apache.struts2.interceptor.TokenSessionStoreInterceptor"/>

            <interceptor name="validation"class="org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor"/>

            <interceptor name="workflow"class="com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor"/>

            <interceptor name="store"class="org.apache.struts2.interceptor.MessageStoreInterceptor" />

            <interceptor name="checkbox"class="org.apache.struts2.interceptor.CheckboxInterceptor" />

            <interceptor name="profiling"class="org.apache.struts2.interceptor.ProfilingActivationInterceptor" />

            <interceptor name="roles"class="org.apache.struts2.interceptor.RolesInterceptor" />

 

            <!-- Basic stack -->

            <interceptor-stack name="basicStack">

                <interceptor-ref name="exception"/>

                <interceptor-ref name="servletConfig"/>

                <interceptor-ref name="prepare"/>

                <interceptor-ref name="checkbox"/>

                <interceptor-ref name="params"/>

                <interceptor-ref name="conversionError"/>

            </interceptor-stack>

 

            <!-- Sample validation and workflow stack -->

            <interceptor-stack name="validationWorkflowStack">

                <interceptor-ref name="basicStack"/>

                <interceptor-ref name="validation"/>

                <interceptor-ref name="workflow"/>

            </interceptor-stack>

 

            <!-- Sample file upload stack -->

            <interceptor-stack name="fileUploadStack">

                <interceptor-ref name="fileUpload"/>

                <interceptor-ref name="basicStack"/>

            </interceptor-stack>

 

            <!-- Sample model-driven stack  -->

            <interceptor-stack name="modelDrivenStack">

                <interceptor-ref name="modelDriven"/>

                <interceptor-ref name="basicStack"/>

            </interceptor-stack>

 

            <!-- Sample action chaining stack -->

            <interceptor-stack name="chainStack">

                <interceptor-ref name="chain"/>

                <interceptor-ref name="basicStack"/>

            </interceptor-stack>

 

            <!-- Sample i18n stack -->

            <interceptor-stack name="i18nStack">

                <interceptor-ref name="i18n"/>

                <interceptor-ref name="basicStack"/>

            </interceptor-stack>

 

            <!-- An example of the params-prepare-params trick. This stack

                 is exactly the same as the defaultStack, except that it

                 includes one extra interceptor before the prepare interceptor:

                 the params interceptor.

 

                 This is useful for when you wish to apply parameters directly

                 to an object that you wish to load externally (such as a DAO

                 or database or service layer), but can't load that object

                 until at least the ID parameter has been loaded. By loading

                 the parameters twice, you can retrieve the object in the

                 prepare() method, allowing the second params interceptor to

                 apply the values on the object. -->

            <interceptor-stack name="paramsPrepareParamsStack">

                <interceptor-ref name="exception"/>

                <interceptor-ref name="alias"/>

                <interceptor-ref name="params"/>

                <interceptor-ref name="servletConfig"/>

                <interceptor-ref name="prepare"/>

                <interceptor-ref name="i18n"/>

                <interceptor-ref name="chain"/>

                <interceptor-ref name="modelDriven"/>

                <interceptor-ref name="fileUpload"/>

                <interceptor-ref name="checkbox"/>

                <interceptor-ref name="staticParams"/>

                <interceptor-ref name="params"/>

                <interceptor-ref name="conversionError"/>

                <interceptor-ref name="validation">

                    <param name="excludeMethods">input,back,cancel</param>

                </interceptor-ref>

                <interceptor-ref name="workflow">

                    <param name="excludeMethods">input,back,cancel</param>

                </interceptor-ref>

            </interceptor-stack>

 

            <!-- 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

                 servlet-config 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="defaultStack">

                <interceptor-ref name="exception"/>

                <interceptor-ref name="alias"/>

                <interceptor-ref name="servletConfig"/>

                <interceptor-ref name="prepare"/>

                <interceptor-ref name="i18n"/>

                <interceptor-ref name="chain"/>

                <interceptor-ref name="debugging"/>

                <interceptor-ref name="profiling"/>

                <interceptor-ref name="scopedModelDriven"/>

                <interceptor-ref name="modelDriven"/>

                <interceptor-ref name="fileUpload"/>

                <interceptor-ref name="checkbox"/>

                <interceptor-ref name="staticParams"/>

                <interceptor-ref name="params">

                  <param name="excludeParams">dojo\..*</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>

 

            <!-- The completeStack is here for backwards compatibility for

                 applications that still refer to the defaultStack by the

                 old name -->

            <interceptor-stack name="completeStack">

                <interceptor-ref name="defaultStack"/>

            </interceptor-stack>

 

            <!-- Sample execute and wait stack.

                 Note: execAndWait should always be the *last* interceptor. -->

            <interceptor-stack name="executeAndWaitStack">

                <interceptor-ref name="execAndWait">

                    <param name="excludeMethods">input,back,cancel</param>

                </interceptor-ref>

                <interceptor-ref name="defaultStack"/>

                <interceptor-ref name="execAndWait">

                    <param name="excludeMethods">input,back,cancel</param>

                </interceptor-ref>

            </interceptor-stack>

 

            <!-- Deprecated name forms scheduled for removal in Struts 2.1.0. The camelCase versions are preferred. See ww-1707 -->

            <interceptor name="external-ref"class="com.opensymphony.xwork2.interceptor.ExternalReferencesInterceptor"/>

            <interceptor name="model-driven"class="com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor"/>

            <interceptor name="static-params"class="com.opensymphony.xwork2.interceptor.StaticParametersInterceptor"/>

            <interceptor name="scoped-model-driven"class="com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor"/>

            <interceptor name="servlet-config"class="org.apache.struts2.interceptor.ServletConfigInterceptor"/>

            <interceptor name="token-session"class="org.apache.struts2.interceptor.TokenSessionStoreInterceptor"/>

 

       </interceptors>

 

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

    </package>

 

</struts>

 

原文：  http://yhjhappy234.blog.163.com/blog/static/31632832201181154627210/