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

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org.springframework.web.servlet.view
Class AbstractTemplateView

java.lang.Object
  org.springframework.context.support.ApplicationObjectSupport
      org.springframework.web.context.support.WebApplicationObjectSupport
          org.springframework.web.servlet.view.AbstractView
              org.springframework.web.servlet.view.AbstractUrlBasedView
                  org.springframework.web.servlet.view.AbstractTemplateView

All Implemented Interfaces:: BeanNameAware, InitializingBean, ApplicationContextAware, ServletContextAware, View

Direct Known Subclasses:: FreeMarkerView, VelocityView

public abstract class AbstractTemplateView
extends AbstractUrlBasedView
extends AbstractUrlBasedView

AbstractTemplateView provides template based view technologies such as Velocity and FreeMarker, with the ability to use request and session attributes in their model and the option to expose helper objects for Spring's Velocity/FreeMarker macro library.

JSP/JSTL and other view technologies automatically have access to the HttpServletRequest object and thereby the request/session attributes for the current user. Furthermore, they are able to create and cache helper objects as request attributes themselves.

Since:: 1.0.2
Author:: Darren Davison, Juergen Hoeller

Field Summary

static String SPRING_MACRO_REQUEST_CONTEXT_ATTRIBUTE
          Variable name of the RequestContext instance in the template model, available to Spring's macros: e.g. for creating BindStatus objects.

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

AbstractTemplateView()


Method Summary

protected void applyContentType(HttpServletResponse response)
          Apply this view's content type as specified in the "contentType" bean property to the given response.

protected void renderMergedOutputModel(Map model, HttpServletRequest request, HttpServletResponse response)
          Subclasses must implement this method to actually render the view.

protected abstract void renderMergedTemplateModel(Map model, HttpServletRequest request, HttpServletResponse response)
          Subclasses must implement this method to actually render the view.

void setAllowRequestOverride(boolean allowRequestOverride)
          Set whether HttpServletRequest attributes are allowed to override (hide) controller generated model attributes of the same name.

void setAllowSessionOverride(boolean allowSessionOverride)
          Set whether HttpSession attributes are allowed to override (hide) controller generated model attributes of the same name.

void setExposeRequestAttributes(boolean exposeRequestAttributes)
          Set whether all request attributes should be added to the model prior to merging with the template.

void setExposeSessionAttributes(boolean exposeSessionAttributes)
          Set whether all HttpSession attributes should be added to the model prior to merging with the template.

void setExposeSpringMacroHelpers(boolean exposeSpringMacroHelpers)
          Set whether to expose a RequestContext for use by Spring's macro library, under the name "springMacroRequestContext".

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, initApplicationContext, requiredContextClass, setApplicationContext

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Summary
`static String`	`SPRING_MACRO_REQUEST_CONTEXT_ATTRIBUTE` Variable name of the RequestContext instance in the template model, available to Spring's macros: e.g. for creating BindStatus objects.

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
`AbstractTemplateView()`

Method Summary
`protected void`	`applyContentType(HttpServletResponse response)` Apply this view's content type as specified in the "contentType" bean property to the given response.
`protected void`	`renderMergedOutputModel(Map model, HttpServletRequest request, HttpServletResponse response)` Subclasses must implement this method to actually render the view.
`protected abstract void`	`renderMergedTemplateModel(Map model, HttpServletRequest request, HttpServletResponse response)` Subclasses must implement this method to actually render the view.
`void`	`setAllowRequestOverride(boolean allowRequestOverride)` Set whether HttpServletRequest attributes are allowed to override (hide) controller generated model attributes of the same name.
`void`	`setAllowSessionOverride(boolean allowSessionOverride)` Set whether HttpSession attributes are allowed to override (hide) controller generated model attributes of the same name.
`void`	`setExposeRequestAttributes(boolean exposeRequestAttributes)` Set whether all request attributes should be added to the model prior to merging with the template.
`void`	`setExposeSessionAttributes(boolean exposeSessionAttributes)` Set whether all HttpSession attributes should be added to the model prior to merging with the template.
`void`	`setExposeSpringMacroHelpers(boolean exposeSpringMacroHelpers)` Set whether to expose a RequestContext for use by Spring's macro library, under the name "springMacroRequestContext".

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, initApplicationContext, requiredContextClass, setApplicationContext`

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

Field Detail

SPRING_MACRO_REQUEST_CONTEXT_ATTRIBUTE

public static final String SPRING_MACRO_REQUEST_CONTEXT_ATTRIBUTE

Variable name of the RequestContext instance in the template model, available to Spring's macros: e.g. for creating BindStatus objects.

See Also:: Constant Field Values

Constructor Detail

AbstractTemplateView

public AbstractTemplateView()

Method Detail

setExposeRequestAttributes

public void setExposeRequestAttributes(boolean exposeRequestAttributes)

Set whether all request attributes should be added to the model prior to merging with the template. Default is "false".

setAllowRequestOverride

public void setAllowRequestOverride(boolean allowRequestOverride)

Set whether HttpServletRequest attributes are allowed to override (hide) controller generated model attributes of the same name. Default is "false", which causes an exception to be thrown if request attributes of the same name as model attributes are found.

setExposeSessionAttributes

public void setExposeSessionAttributes(boolean exposeSessionAttributes)

Set whether all HttpSession attributes should be added to the model prior to merging with the template. Default is "false".

setAllowSessionOverride

public void setAllowSessionOverride(boolean allowSessionOverride)

Set whether HttpSession attributes are allowed to override (hide) controller generated model attributes of the same name. Default is "false", which causes an exception to be thrown if session attributes of the same name as model attributes are found.

setExposeSpringMacroHelpers

public void setExposeSpringMacroHelpers(boolean exposeSpringMacroHelpers)

Set whether to expose a RequestContext for use by Spring's macro library, under the name "springMacroRequestContext". Default is "false".

Currently needed for Spring's Velocity and FreeMarker default macros. Note that this is not required for templates that use HTML forms unless you wish to take advantage of the Spring helper macros.

See Also:: SPRING_MACRO_REQUEST_CONTEXT_ATTRIBUTE

renderMergedOutputModel

protected final void renderMergedOutputModel(Map model,
                                             HttpServletRequest request,
                                             HttpServletResponse response)
                                      throws Exception

Description copied from class: AbstractView

Subclasses must implement this method to actually render the view.

The first step will be preparing the request: In the JSP case, this would mean setting model objects as request attributes. The second step will be the actual rendering of the view, for example including the JSP via a RequestDispatcher.

Specified by:: renderMergedOutputModel in class AbstractView

Parameters:: model - combined output Map (never null), with dynamic values taking precedence over static attributes; request - current HTTP request; response - current HTTP response
Throws:: Exception - if rendering failed

applyContentType

protected void applyContentType(HttpServletResponse response)

Apply this view's content type as specified in the "contentType" bean property to the given response.

When running on Servlet 2.4, only applies the view's contentType if no content type has been set on the response before. This allows handlers to override the default content type beforehand.

Parameters:: response - current HTTP response
See Also:: AbstractView.setContentType(java.lang.String)

renderMergedTemplateModel

protected abstract void renderMergedTemplateModel(Map model,
                                                  HttpServletRequest request,
                                                  HttpServletResponse response)
                                           throws Exception