Question

Struts2 配置文件标签问题

<constant name="" value="true"/>

这个标签的作用是什么

Answer 1

在struts的配置文件中的形式为：

<constant name="struts.i18n.encoding" value="UTF-8" />

struts.action.extension
The URL extension to use to determine if the request is meant for a Struts action
用URL扩展名来确定是否这个请求是被用作Struts action，其实也就是设置 action的后缀，例如login.do的'do'字。

struts.configuration
The org.apache.struts2.config.Configuration implementation class
org.apache.struts2.config.Configuration接口名

struts.configuration.files
A list of configuration files automatically loaded by Struts
struts自动加载的一个配置文件列表

struts.configuration.xml.reload
Whether to reload the XML configuration or not
是否加载xml配置(true,false)

struts.continuations.package
The package containing actions that use Rife continuations
含有actions的完整连续的package名称

struts.custom.i18n.resources
Location of additional localization properties files to load
加载附加的国际化属性文件（不包含.properties后缀）

struts.custom.properties
Location of additional configuration properties files to load
加载附加的配置文件的位置

struts.devMode
Whether Struts is in development mode or not
是否为struts开发模式

struts.dispatcher.parametersWorkaround
Whether to use a Servlet request parameter workaround necessary for some versions of WebLogic
（某些版本的weblogic专用）是否使用一个servlet请求参数工作区（PARAMETERSWORKAROUND）

struts.enable.DynamicMethodInvocation
Allows one to disable dynamic method invocation from the URL
允许动态方法调用

struts.freemarker.manager.classname
The org.apache.struts2.views.freemarker.FreemarkerManager implementation class
org.apache.struts2.views.freemarker.FreemarkerManager接口名

struts.i18n.encoding
The encoding to use for localization messages
国际化信息内码

struts.i18n.reload
Whether the localization messages should automatically be reloaded
是否国际化信息自动加载

struts.locale
The default locale for the Struts application
默认的国际化地区信息

struts.mapper.class
The org.apache.struts2.dispatcher.mapper.ActionMapper implementation class
org.apache.struts2.dispatcher.mapper.ActionMapper接口

struts.multipart.maxSize
The maximize size of a multipart request (file upload)
multipart请求信息的最大尺寸（文件上传用）

struts.multipart.parser
The org.apache.struts2.dispatcher.multipart.MultiPartRequest parser implementation for a multipart request (file upload)
专为multipart请求信息使用的 org.apache.struts2.dispatcher.multipart.MultiPartRequest解析器接口（文件上传用）

struts.multipart.saveDir
The directory to use for storing uploaded files
设置存储上传文件的目录夹

struts.objectFactory
The com.opensymphony.xwork2.ObjectFactory implementation class
com.opensymphony.xwork2.ObjectFactory接口（spring）

struts.objectFactory.spring.autoWire
Whether Spring should autoWire or not
是否自动绑定Spring

struts.objectFactory.spring.useClassCache
Whether Spring should use its class cache or not
是否spring应该使用自身的cache

struts.objectTypeDeterminer
The com.opensymphony.xwork2.util.ObjectTypeDeterminer implementation class
com.opensymphony.xwork2.util.ObjectTypeDeterminer接口

struts.serve.static.browserCache
If static content served by the Struts filter should set browser caching header properties or not
是否struts过滤器中提供的静态内容应该被浏览器缓存在头部属性中

struts.serve.static
Whether the Struts filter should serve static content or not
是否struts过滤器应该提供静态内容

struts.tag.altSyntax
Whether to use the alterative syntax for the tags or not
是否可以用替代的语法替代tags

struts.ui.templateDir
The directory containing UI templates
UI templates的目录夹

struts.ui.theme
The default UI template theme
默认的UI template主题

struts.url.http.port
The HTTP port used by Struts URLs
设置http端口

struts.url.https.port
The HTTPS port used by Struts URLs
设置https端口

struts.url.includeParams
The default includeParams method to generate Struts URLs
在url中产生 默认的includeParams

struts.velocity.configfile
The Velocity configuration file path
velocity配置文件路径

struts.velocity.contexts
List of Velocity context names
velocity的context列表

struts.velocity.manager.classname
org.apache.struts2.views.velocity.VelocityManager implementation class
org.apache.struts2.views.velocity.VelocityManager接口名

struts.velocity.toolboxlocation
The location of the Velocity toolbox
velocity工具盒的位置
struts.xslt.nocache
Whether or not XSLT templates should not be cached
是否XSLT模版应该被缓存

【原创】struts2的struts.properties配置文件详解

struts.action.extension
The URL extension to use to determine if the request is meant for a Struts action
用URL扩展名来确定是否这个请求是被用作Struts action，其实也就是设置 action的后缀，例如login.do的'do'字。

struts.configuration
The org.apache.struts2.config.Configuration implementation class
org.apache.struts2.config.Configuration接口名

struts.configuration.files
A list of configuration files automatically loaded by Struts
struts自动加载的一个配置文件列表

struts.configuration.xml.reload
Whether to reload the XML configuration or not
是否加载xml配置(true,false)

struts.continuations.package
The package containing actions that use Rife continuations
含有actions的完整连续的package名称

struts.custom.i18n.resources
Location of additional localization properties files to load
加载附加的国际化属性文件（不包含.properties后缀）

struts.custom.properties
Location of additional configuration properties files to load
加载附加的配置文件的位置

struts.devMode
Whether Struts is in development mode or not
是否为struts开发模式

struts.dispatcher.parametersWorkaround
Whether to use a Servlet request parameter workaround necessary for some versions of WebLogic
（某些版本的weblogic专用）是否使用一个servlet请求参数工作区（PARAMETERSWORKAROUND）

struts.enable.DynamicMethodInvocation
Allows one to disable dynamic method invocation from the URL
允许动态方法调用

struts.freemarker.manager.classname
The org.apache.struts2.views.freemarker.FreemarkerManager implementation class
org.apache.struts2.views.freemarker.FreemarkerManager接口名

struts.i18n.encoding
The encoding to use for localization messages
国际化信息内码

struts.i18n.reload
Whether the localization messages should automatically be reloaded
是否国际化信息自动加载

struts.locale
The default locale for the Struts application
默认的国际化地区信息

struts.mapper.class
The org.apache.struts2.dispatcher.mapper.ActionMapper implementation class
org.apache.struts2.dispatcher.mapper.ActionMapper接口

struts.multipart.maxSize
The maximize size of a multipart request (file upload)
multipart请求信息的最大尺寸（文件上传用）

struts.multipart.parser
The org.apache.struts2.dispatcher.multipart.MultiPartRequest parser implementation for a multipart request (file upload)
专为multipart请求信息使用的 org.apache.struts2.dispatcher.multipart.MultiPartRequest解析器接口（文件上传用）

struts.multipart.saveDir
The directory to use for storing uploaded files
设置存储上传文件的目录夹

struts.objectFactory
The com.opensymphony.xwork2.ObjectFactory implementation class
com.opensymphony.xwork2.ObjectFactory接口（spring）

struts.objectFactory.spring.autoWire
Whether Spring should autoWire or not
是否自动绑定Spring

struts.objectFactory.spring.useClassCache
Whether Spring should use its class cache or not
是否spring应该使用自身的cache

struts.objectTypeDeterminer
The com.opensymphony.xwork2.util.ObjectTypeDeterminer implementation class
com.opensymphony.xwork2.util.ObjectTypeDeterminer接口

struts.serve.static.browserCache
If static content served by the Struts filter should set browser caching header properties or not
是否struts过滤器中提供的静态内容应该被浏览器缓存在头部属性中

struts.serve.static
Whether the Struts filter should serve static content or not
是否struts过滤器应该提供静态内容

struts.tag.altSyntax
Whether to use the alterative syntax for the tags or not
是否可以用替代的语法替代tags

struts.ui.templateDir
The directory containing UI templates
UI templates的目录夹

struts.ui.theme
The default UI template theme
默认的UI template主题

struts.url.http.port
The HTTP port used by Struts URLs
设置http端口

struts.url.https.port
The HTTPS port used by Struts URLs
设置https端口

struts.url.includeParams
The default includeParams method to generate Struts URLs
在url中产生 默认的includeParams

struts.velocity.configfile
The Velocity configuration file path
velocity配置文件路径

struts.velocity.contexts
List of Velocity context names
velocity的context列表

struts.velocity.manager.classname
org.apache.struts2.views.velocity.VelocityManager implementation class
org.apache.struts2.views.velocity.VelocityManager接口名

struts.velocity.toolboxlocation
The location of the Velocity toolbox
velocity工具盒的位置
struts.xslt.nocache
Whether or not XSLT templates should not be cached
是否XSLT模版应该被缓存

Answer 2

怎么由.action改为.do
<constant name="struts.action.extension" value="do"/>
do或action
<constant name="struts.action.extension" value="do,action"/>

truts2用来指定默认编码的
<constant name="struts.i18n.encoding" value="UTF-8"/>

改变常量后不许重启服务器
<constant name="struts.configuration.xml.reload" value="true"/>
系统默认为false

便于排错,打印出更详细的错误信息
<constant name="struts.devMode" value="true">

设置浏览器是否缓存静态内容，默认为TRUE 开发阶段最好关闭
<constant name="struts.server.static.browserCache" valur="false"/>

默认的视图主题
<constant name="struts.ui.theme" value="simple"/>

与spring集成时，指定spring负责action对象的创建
<struts name="struts.objectFactory" value="spring"/>

上传文件大小限制
<struts name="struts.multipart.maxSize" value="10241024"/>