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

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org.springframework.web.servlet.view
Class ResourceBundleViewResolver

java.lang.Object
  org.springframework.context.support.ApplicationObjectSupport
      org.springframework.web.context.support.WebApplicationObjectSupport
          org.springframework.web.servlet.view.AbstractCachingViewResolver
              org.springframework.web.servlet.view.ResourceBundleViewResolver

All Implemented Interfaces:: DisposableBean, ApplicationContextAware, Ordered, ServletContextAware, ViewResolver

public class ResourceBundleViewResolver
extends AbstractCachingViewResolver
implements Ordered, DisposableBean
extends AbstractCachingViewResolver
implements Ordered, DisposableBean

ViewResolver implementation that uses bean definitions in a ResourceBundle, specified by the bundle basename.

The bundle is typically defined in a properties file, located in the class path. The default bundle basename is "views".

This ViewResolver supports localized view definitions, using the default support of PropertyResourceBundle. For example, the basename "views" will be resolved as class path resources "views_de_AT.properties", "views_de.properties", "views.properties" - for a given Locale "de_AT".

Note: this ViewResolver implements the Ordered interface to allow for flexible participation in ViewResolver chaining. For example, some special views could be defined via this ViewResolver (giving it 0 as "order" value), while all remaining views could be resolved by a UrlBasedViewResolver.

Author:: Rod Johnson, Juergen Hoeller
See Also:: ResourceBundle.getBundle(java.lang.String), PropertyResourceBundle, UrlBasedViewResolver

Field Summary

static String DEFAULT_BASENAME
          The default basename if no other basename is supplied.

Fields inherited from class org.springframework.context.support.ApplicationObjectSupport

logger

Fields inherited from interface org.springframework.core.Ordered

HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE

Constructor Summary

ResourceBundleViewResolver()


Method Summary

void destroy()
          Close the bundle View factories on context shutdown.

protected ResourceBundle getBundle(String basename, Locale locale)
          Obtain the resource bundle for the given basename and Locale.

protected ClassLoader getBundleClassLoader()
          Return the ClassLoader to load resource bundles with.

int getOrder()
          Return the order value of this object, with a higher value meaning greater in terms of sorting.

protected void initApplicationContext()
          Subclasses can override this for custom initialization behavior.

protected BeanFactory initFactory(Locale locale)
          Initialize the View BeanFactory from the ResourceBundle, for the given locale.

protected View loadView(String viewName, Locale locale)
          Subclasses must implement this method, building a View object for the specified view.

void setBasename(String basename)
          Set the basename, as defined in the ResourceBundle documentation.

void setBasenames(String[] basenames)
          Set multiple ResourceBundle basenames.

void setBundleClassLoader(ClassLoader classLoader)
          Set the ClassLoader to load resource bundles with.

void setDefaultParentView(String defaultParentView)
          Set the default parent for views defined in the ResourceBundle.

void setLocalesToInitialize(Locale[] localesToInitialize)
          Specify Locales to initialize eagerly, rather than lazily when actually accessed.

void setOrder(int order)


Methods inherited from class org.springframework.web.servlet.view.AbstractCachingViewResolver

clearCache, createView, getCacheKey, isCache, removeFromCache, resolveViewName, setCache

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, toString, wait, wait, wait

Field Summary
`static String`	`DEFAULT_BASENAME` The default basename if no other basename is supplied.

Fields inherited from class org.springframework.context.support.ApplicationObjectSupport
`logger`

Fields inherited from interface org.springframework.core.Ordered
`HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE`

Constructor Summary
`ResourceBundleViewResolver()`

Method Summary
`void`	`destroy()` Close the bundle View factories on context shutdown.
`protected ResourceBundle`	`getBundle(String basename, Locale locale)` Obtain the resource bundle for the given basename and `Locale`.
`protected ClassLoader`	`getBundleClassLoader()` Return the `ClassLoader` to load resource bundles with.
`int`	`getOrder()` Return the order value of this object, with a higher value meaning greater in terms of sorting.
`protected void`	`initApplicationContext()` Subclasses can override this for custom initialization behavior.
`protected BeanFactory`	`initFactory(Locale locale)` Initialize the View `BeanFactory` from the `ResourceBundle`, for the given `locale`.
`protected View`	`loadView(String viewName, Locale locale)` Subclasses must implement this method, building a View object for the specified view.
`void`	`setBasename(String basename)` Set the basename, as defined in the `ResourceBundle` documentation.
`void`	`setBasenames(String[] basenames)` Set multiple `ResourceBundle` basenames.
`void`	`setBundleClassLoader(ClassLoader classLoader)` Set the `ClassLoader` to load resource bundles with.
`void`	`setDefaultParentView(String defaultParentView)` Set the default parent for views defined in the `ResourceBundle`.
`void`	`setLocalesToInitialize(Locale[] localesToInitialize)` Specify Locales to initialize eagerly, rather than lazily when actually accessed.
`void`	`setOrder(int order)`

Methods inherited from class org.springframework.web.servlet.view.AbstractCachingViewResolver
`clearCache, createView, getCacheKey, isCache, removeFromCache, resolveViewName, setCache`

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, toString, wait, wait, wait`

Field Detail

DEFAULT_BASENAME

public static final String DEFAULT_BASENAME

The default basename if no other basename is supplied.

See Also:: Constant Field Values

Constructor Detail

ResourceBundleViewResolver

public ResourceBundleViewResolver()

Method Detail

setOrder

public void setOrder(int order)

getOrder

public int getOrder()

Description copied from interface: Ordered

Return the order value of this object, with a higher value meaning greater in terms of sorting.

Normally starting with 0 or 1, with Ordered.LOWEST_PRECEDENCE indicating greatest. Same order values will result in arbitrary positions for the affected objects.

Higher value can be interpreted as lower priority, consequently the first object has highest priority (somewhat analogous to Servlet "load-on-startup" values).

Note that order values below 0 are reserved for framework purposes. Application-specified values should always be 0 or greater, with only framework components (internal or third-party) supposed to use lower values.

Specified by:: getOrder in interface Ordered

Returns:: the order value
See Also:: Ordered.LOWEST_PRECEDENCE

setBasename

public void setBasename(String basename)

Set the basename, as defined in the ResourceBundle documentation.

ResourceBundle supports different suffixes. For example, a base name of "views" might map to ResourceBundle files "views", "views_en_au" and "views_de".

The default is "views".

See Also:: setBasenames(java.lang.String[]), ResourceBundle

setBasenames

public void setBasenames(String[] basenames)

Set multiple ResourceBundle basenames.

See Also:: setBasename(java.lang.String)

setBundleClassLoader

public void setBundleClassLoader(ClassLoader classLoader)

Set the ClassLoader to load resource bundles with. Default is the thread context ClassLoader.

getBundleClassLoader

protected ClassLoader getBundleClassLoader()

Return the ClassLoader to load resource bundles with.

Default is the specified bundle ClassLoader, usually the thread context ClassLoader.

setDefaultParentView

public void setDefaultParentView(String defaultParentView)

Set the default parent for views defined in the ResourceBundle.

This avoids repeated "yyy1.(parent)=xxx", "yyy2.(parent)=xxx" definitions in the bundle, especially if all defined views share the same parent.

The parent will typically define the view class and common attributes. Concrete views might simply consist of an URL definition then: a la "yyy1.url=/my.jsp", "yyy2.url=/your.jsp".

View definitions that define their own parent or carry their own class can still override this. Strictly speaking, the rule that a default parent setting does not apply to a bean definition that carries a class is there for backwards compatiblity reasons. It still matches the typical use case.

setLocalesToInitialize

public void setLocalesToInitialize(Locale[] localesToInitialize)

Specify Locales to initialize eagerly, rather than lazily when actually accessed.

Allows for pre-initialization of common Locales, eagerly checking the view configuration for those Locales.

initApplicationContext

protected void initApplicationContext()
                               throws BeansException

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

Throws:: ApplicationContextException - in case of initialization errors; BeansException - if thrown by ApplicationContext methods
See Also:: ApplicationObjectSupport.setApplicationContext(org.springframework.context.ApplicationContext)

loadView

protected View loadView(String viewName,
                        Locale locale)
                 throws Exception

Description copied from class: AbstractCachingViewResolver

Subclasses must implement this method, building a View object for the specified view. The returned View objects will be cached by this ViewResolver base class.

Subclasses are not forced to support internationalization: A subclass that does not may simply ignore the locale parameter.

Specified by:: loadView in class AbstractCachingViewResolver

Parameters:: viewName - the name of the view to retrieve; locale - the Locale to retrieve the view for
Returns:: the View instance, or null if not found (optional, to allow for ViewResolver chaining)
Throws:: Exception - if the view couldn't be resolved
See Also:: AbstractCachingViewResolver.resolveViewName(java.lang.String, java.util.Locale)

initFactory

protected BeanFactory initFactory(Locale locale)
                           throws BeansException

Initialize the View BeanFactory from the ResourceBundle, for the given locale.

Synchronized because of access by parallel threads.

Parameters:: locale - the target Locale
Returns:: the View factory for the given Locale
Throws:: BeansException - in case of initialization errors

getBundle

protected ResourceBundle getBundle(String basename,
                                   Locale locale)
                            throws MissingResourceException

Obtain the resource bundle for the given basename and Locale.

Parameters:: basename - the basename to look for; locale - the Locale to look for
Returns:: the corresponding ResourceBundle
Throws:: MissingResourceException - if no matching bundle could be found
See Also:: ResourceBundle.getBundle(String, java.util.Locale, ClassLoader)

destroy

public void destroy()
             throws BeansException

Close the bundle View factories on context shutdown.

Specified by:: destroy in interface DisposableBean

Throws:: BeansException