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ActionSupport (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

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org.springframework.web.struts
Class ActionSupport

java.lang.Object
  org.apache.struts.action.Action
      org.springframework.web.struts.ActionSupport

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public abstract class ActionSupport
extends Action

Convenience class for Spring-aware Struts 1.1+ Actions.

Provides a reference to the current Spring application context, e.g. for bean lookup or resource loading. Auto-detects a ContextLoaderPlugIn context, falling back to the root WebApplicationContext. For typical usage, i.e. accessing middle tier beans, use a root WebApplicationContext.

For Struts DispatchActions or Lookup/MappingDispatchActions, use the analogous DispatchActionSupport or LookupDispatchActionSupport / MappingDispatchActionSupport class, respectively.

As an alternative approach, you can wire your Struts Actions themselves as Spring beans, passing references to them via IoC rather than looking up references in a programmatic fashion. Check out DelegatingActionProxy and DelegatingRequestProcessor.

Since:

1.0.1

Author:

Juergen Hoeller

See Also:

ContextLoaderPlugIn.SERVLET_CONTEXT_PREFIX, WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE, ContextLoaderListener, ContextLoaderServlet, DispatchActionSupport, LookupDispatchActionSupport, MappingDispatchActionSupport, DelegatingActionProxy, DelegatingRequestProcessor

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Field Summary

 

Fields inherited from class org.apache.struts.action.Action
defaultLocale, servlet

 

Constructor Summary
ActionSupport()

 

Method Summary
protected  MessageSourceAccessor	getMessageSourceAccessor()           Return a MessageSourceAccessor for the application context used by this object, for easy message access.
protected  ServletContext	getServletContext()           Return the current ServletContext.
protected  File	getTempDir()           Return the temporary directory for the current web application, as provided by the servlet container.
protected  WebApplicationContext	getWebApplicationContext()           Return the current Spring WebApplicationContext.
protected  WebApplicationContext	initWebApplicationContext(ActionServlet actionServlet)           Fetch ContextLoaderPlugIn's WebApplicationContext from the ServletContext, falling back to the root WebApplicationContext (the usual case).
protected  void	onDestroy()           Callback for custom destruction when the ActionServlet shuts down.
protected  void	onInit()           Callback for custom initialization after the context has been set up.
void	setServlet(ActionServlet actionServlet)           Initialize the WebApplicationContext for this Action.

 

Methods inherited from class org.apache.struts.action.Action
addErrors, addMessages, execute, execute, generateToken, getDataSource, getDataSource, getErrors, getLocale, getMessages, getResources, getResources, getServlet, isCancelled, isTokenValid, isTokenValid, resetToken, saveErrors, saveErrors, saveErrors, saveMessages, saveMessages, saveToken, setLocale

 

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Constructor Detail

ActionSupport

public ActionSupport()

Method Detail

setServlet

public void setServlet(ActionServlet actionServlet)

Initialize the WebApplicationContext for this Action. Invokes onInit after successful initialization of the context.

Overrides:

setServlet in class Action

See Also:

initWebApplicationContext(org.apache.struts.action.ActionServlet), onInit()

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initWebApplicationContext

protected WebApplicationContext initWebApplicationContext(ActionServlet actionServlet)
                                                   throws IllegalStateException

Fetch ContextLoaderPlugIn's WebApplicationContext from the ServletContext, falling back to the root WebApplicationContext (the usual case).

Parameters:

actionServlet - the associated ActionServlet

Returns:

the WebApplicationContext

Throws:

IllegalStateException - if no WebApplicationContext could be found

See Also:

DelegatingActionUtils.findRequiredWebApplicationContext(org.apache.struts.action.ActionServlet, org.apache.struts.config.ModuleConfig)

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getWebApplicationContext

protected final WebApplicationContext getWebApplicationContext()

Return the current Spring WebApplicationContext.

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getMessageSourceAccessor

protected final MessageSourceAccessor getMessageSourceAccessor()

Return a MessageSourceAccessor for the application context used by this object, for easy message access.

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getServletContext

protected final ServletContext getServletContext()

Return the current ServletContext.

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getTempDir

protected final File getTempDir()

Return the temporary directory for the current web application, as provided by the servlet container.

Returns:

the File representing the temporary directory

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onInit

protected void onInit()

Callback for custom initialization after the context has been set up.

See Also:

setServlet(org.apache.struts.action.ActionServlet)

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onDestroy

protected void onDestroy()

Callback for custom destruction when the ActionServlet shuts down.

See Also:

setServlet(org.apache.struts.action.ActionServlet)

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