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JstlView (Spring Framework API 2.0) - Spring Framework 2.0.5 API 文档英文版

The Spring Framework

org.springframework.web.servlet.view
Class JstlView

java.lang.Object
  extended by org.springframework.context.support.ApplicationObjectSupport
      extended by org.springframework.web.context.support.WebApplicationObjectSupport
          extended by org.springframework.web.servlet.view.AbstractView
              extended by org.springframework.web.servlet.view.AbstractUrlBasedView
                  extended by org.springframework.web.servlet.view.InternalResourceView
                      extended by org.springframework.web.servlet.view.JstlView
All Implemented Interfaces:
BeanNameAware, InitializingBean, ApplicationContextAware, ServletContextAware, View

public class JstlView
extends InternalResourceView

Specialization of InternalResourceView for JSTL pages, i.e. JSP pages that use the JSP Standard Tag Library.

Exposes JSTL-specific request attributes specifying locale and resource bundle for JSTL's formatting and message tags, using Spring's locale and message source.

Typical usage with InternalResourceViewResolver would look as follows, from the perspective of the DispatcherServlet context definition:

 <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
   <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
   <property name="prefix" value="/WEB-INF/jsp/"/>
   <property name="suffix" value=".jsp"/>
 </bean>

 <bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
   <property name="basename" value="messages"/>
 </bean>
Every view name returned from a handler will be translated to a JSP resource (for example: "myView" -> "/WEB-INF/jsp/myView.jsp"), using this view class to enable explicit JSTL support.

The specified MessageSource loads messages from "messages.properties" etc files in the class path. This will automatically be exposed to views as JSTL localization context, which the JSTL fmt tags (message etc) will use. Consider using Spring's ReloadableResourceBundleMessageSource instead of the standard ResourceBundleMessageSource for more sophistication. Of course, any other Spring components can share the same MessageSource.

This is a separate class mainly to avoid JSTL dependencies in InternalResourceView itself. JSTL has not been part of standard J2EE up until J2EE 1.4, so we can't assume the JSTL API jar to be available on the class path.

Since:
27.02.2003
Author:
Juergen Hoeller
See Also:
JstlUtils.exposeLocalizationContext(javax.servlet.http.HttpServletRequest, org.springframework.context.MessageSource), InternalResourceViewResolver, ResourceBundleMessageSource, ReloadableResourceBundleMessageSource

Field Summary
 
Fields inherited from class org.springframework.web.servlet.view.AbstractView
DEFAULT_CONTENT_TYPE
 
Fields inherited from class org.springframework.context.support.ApplicationObjectSupport
logger
 
Constructor Summary
JstlView()
           
 
Method Summary
protected  void exposeHelpers(HttpServletRequest request)
          Expose helpers unique to each rendering operation.
protected  void initApplicationContext()
          Subclasses can override this for custom initialization behavior.
 
Methods inherited from class org.springframework.web.servlet.view.InternalResourceView
exposeForwardRequestAttributes, prepareForRendering, renderMergedOutputModel, setAlwaysInclude, useInclude
 
Methods inherited from class org.springframework.web.servlet.view.AbstractUrlBasedView
afterPropertiesSet, getUrl, setUrl, toString
 
Methods inherited from class org.springframework.web.servlet.view.AbstractView
addStaticAttribute, createRequestContext, exposeModelAsRequestAttributes, getAttributesMap, getBeanName, getContentType, getRequestContextAttribute, getStaticAttributes, render, setAttributes, setAttributesCSV, setAttributesMap, setBeanName, setContentType, setRequestContextAttribute
 
Methods inherited from class org.springframework.web.context.support.WebApplicationObjectSupport
getServletContext, getTempDir, getWebApplicationContext, isContextRequired, setServletContext
 
Methods inherited from class org.springframework.context.support.ApplicationObjectSupport
getApplicationContext, getMessageSourceAccessor, requiredContextClass, setApplicationContext
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

JstlView

public JstlView()
Method Detail

initApplicationContext

protected void initApplicationContext()
Description copied from class: ApplicationObjectSupport
Subclasses can override this for custom initialization behavior. Gets called by setApplicationContext after setting the context instance.

Note: Does not get called on reinitialization of the context but rather just on first initialization of this object's context reference.

Overrides:
initApplicationContext in class ApplicationObjectSupport
See Also:
ApplicationObjectSupport.setApplicationContext(org.springframework.context.ApplicationContext)

exposeHelpers

protected void exposeHelpers(HttpServletRequest request)
                      throws Exception
Description copied from class: InternalResourceView
Expose helpers unique to each rendering operation. This is necessary so that different rendering operations can't overwrite each other's contexts etc.

Called by InternalResourceView.renderMergedOutputModel(Map, HttpServletRequest, HttpServletResponse). The default implementation is empty. This method can be overridden to add custom helpers as request attributes.

Overrides:
exposeHelpers in class InternalResourceView
Parameters:
request - current HTTP request
Throws:
Exception - if there's a fatal error while we're adding attributes
See Also:
InternalResourceView.renderMergedOutputModel(java.util.Map, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse), exposeHelpers(javax.servlet.http.HttpServletRequest), TilesJstlView.exposeHelpers(javax.servlet.http.HttpServletRequest)

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