引用 Struts2中有关struts-default.xml,struts.xml,struts.

 每学习一个框架，我们都免不了要学习一些关于的配置文件，struts2也不例外，下面我就讲一下struts2中几个主要的配置文件。

1） struts-default.xml

这个文件是struts2框架默认加载的配置文件。它定义struts2一些核心的bean和拦截器。

<?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>

<!--struts2中工厂bean的定义-->

    <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"/>

<!--类型检测bean的定义-->

    <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"/>

<!--文件上传bean的定义-->

    <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" />

<!--标签库bean的定义-->

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

<!--一些常用视图bean的定义-->

    <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" />

<!--类型转换bean的定义-->

    <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" />

    <!--  Struts2中一些可以静态注入的bean,也就是不需要实例化的 -->

    <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="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" />

<!-- 定义Struts2默认包-->

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

    <!-- 结果类型的种类-->

        <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" />

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

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

        </result-types>

<!--struts2中拦截器的定义-->

        <interceptors>

        <!--实现在不同请求中相似参数别名的准换-->

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

            <!--与Spring整合时自动装配的拦截器-->

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

            <!--构建一个action链，使当前action可以访问前一个action，与<result-type="chain" 

/>配合使用-->

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

            <!--负责类型转换的拦截器-->

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

            <!--使用配置的name,value来是指cookies -->

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

           <!--负责创建httpSession-->

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

            <!--输出调试信息-->

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

            <!--扩展引用-->

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

            <!--后台执行action负责发送等待画面给用户-->

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

            <!--异常处理-->

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

            <!--文件上传，解析表单域的内容-->

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

            <!--支持国际化-->

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

           <!--日志记录-->

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

            <!--模型拦截器，当action实现了ModelDriven接口时，负责把getModel的结果放入valueStack中-->

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

            <!--有生命周期的ModelDriven-->

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

            <!--负责解析请求中的参数，并赋值给action中对应的属性-->

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

            <!--实现该Preparable接口的action，会调用拦截器的prepare方法-->

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

            <!--负责将action 标签下的param参数值传递给action实例-->

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

            <!--范围转换-->

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

            <!--用于访问Servlet API-->

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

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

            <!--输出action执行时间-->

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

            <!--防止表单重复提交-->

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

            <!--与token拦截器相似，只是把token保存到HttpSession-->

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

            <!--负责表单字段的验证 *-validation.xml-->

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

            <!--负责执行action的validate()-->

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

            <!--存储和重新获取Action 消息/错误/字段错误为Action，实现ValidationAware接口到seesion-->

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

            <!--添加自动checkbox处理代码,这样检探测checkbox和添加它作为一个参数使用默认值(通常’false’).使用一个指定名字隐藏字段探测没提交的checkbox-->

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

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

            <!--JAAS服务拦截器-->

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

            <!-- 一个基本的拦截器栈 -->

            <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>

            <!-- 简单的validtion和webflow栈 -->

            <interceptor-stack name="validationWorkflowStack">

                <interceptor-ref name="basicStack"/>

                <interceptor-ref name="validation"/>

                <interceptor-ref name="workflow"/>

            </interceptor-stack>

            <!-- 文件上传的拦截器栈 -->

            <interceptor-stack name="fileUploadStack">

                <interceptor-ref name="fileUpload"/>

                <interceptor-ref name="basicStack"/>

            </interceptor-stack>

            <!-- model-driven 栈  -->

            <interceptor-stack name="modelDrivenStack">

                <interceptor-ref name="modelDriven"/>

                <interceptor-ref name="basicStack"/>

            </interceptor-stack>

            <!-- action链的拦截器栈 -->

            <interceptor-stack name="chainStack">

                <interceptor-ref name="chain"/>

                <interceptor-ref name="basicStack"/>

            </interceptor-stack>

            <!--  i18n 拦截器栈 -->

            <interceptor-stack name="i18nStack">

                <interceptor-ref name="i18n"/>

                <interceptor-ref name="basicStack"/>

            </interceptor-stack>

            <!-- 结合preparable和ModenDriven拦截器-->

            <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>

            <!--定义默认的拦截器栈  -->

            <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>

            <interceptor-stack name="completeStack">

                <interceptor-ref name="defaultStack"/>

            </interceptor-stack>

            <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>

            <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>

<!--定义默认拦截器为"defaultStack"-->

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

    </package>

</struts>

2） struts.xml

该文件也是struts2框架自动加载的文件，在这个文件中可以定义一些自己的action,interceptor，package等，该文件的package 通常继承struts-default包。下面是这个文件的格式。

<?xml version="1.0" encoding="GBK"?>

<!-- 下面指定Struts 2配置文件的DTD信息 -->

<!DOCTYPE struts PUBLIC

"-//Apache Softwa