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

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org.springframework.web.context.support
Class XmlWebApplicationContext

java.lang.Object
  org.springframework.core.io.DefaultResourceLoader
      org.springframework.context.support.AbstractApplicationContext
          org.springframework.context.support.AbstractRefreshableApplicationContext
              org.springframework.web.context.support.AbstractRefreshableWebApplicationContext
                  org.springframework.web.context.support.XmlWebApplicationContext

All Implemented Interfaces:

BeanFactory, DisposableBean, HierarchicalBeanFactory, ListableBeanFactory, ApplicationContext, ApplicationEventPublisher, ConfigurableApplicationContext, Lifecycle, MessageSource, ResourceLoader, ResourcePatternResolver, ThemeSource, ConfigurableWebApplicationContext, WebApplicationContext

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public class XmlWebApplicationContext
extends AbstractRefreshableWebApplicationContext

WebApplicationContext implementation which takes its configuration from XML documents, understood by an XmlBeanDefinitionReader. This is essentially the equivalent of AbstractXmlApplicationContext for a web environment.

By default, the configuration will be taken from "/WEB-INF/applicationContext.xml" for the root context, and "/WEB-INF/test-servlet.xml" for a context with the namespace "test-servlet" (like for a DispatcherServlet instance with the servlet-name "test").

The config location defaults can be overridden via the "contextConfigLocation" context-param of ContextLoader and servlet init-param of FrameworkServlet. Config locations can either denote concrete files like "/WEB-INF/context.xml" or Ant-style patterns like "/WEB-INF/*-context.xml" (see PathMatcher javadoc for pattern details).

Note: In case of multiple config locations, later bean definitions will override ones defined in earlier loaded files. This can be leveraged to deliberately override certain bean definitions via an extra XML file.

For a WebApplicationContext that reads in a different bean definition format, create an analogous subclass of AbstractRefreshableWebApplicationContext. Such a context implementation can be specified as "contextClass" context-param for ContextLoader or "contextClass" init-param for FrameworkServlet.

Author:

Rod Johnson, Juergen Hoeller

See Also:

AbstractRefreshableWebApplicationContext.setNamespace(java.lang.String), AbstractRefreshableWebApplicationContext.setConfigLocations(java.lang.String[]), XmlBeanDefinitionReader, ContextLoader.initWebApplicationContext(javax.servlet.ServletContext), FrameworkServlet.initWebApplicationContext()

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Field Summary
static String	DEFAULT_CONFIG_LOCATION           Default config location for the root context
static String	DEFAULT_CONFIG_LOCATION_PREFIX           Default prefix for building a config location for a namespace
static String	DEFAULT_CONFIG_LOCATION_SUFFIX           Default suffix for building a config location for a namespace

 

Fields inherited from class org.springframework.context.support.AbstractApplicationContext
APPLICATION_EVENT_MULTICASTER_BEAN_NAME, logger, MESSAGE_SOURCE_BEAN_NAME

 

Fields inherited from interface org.springframework.web.context.ConfigurableWebApplicationContext
CONFIG_LOCATION_DELIMITERS

 

Fields inherited from interface org.springframework.web.context.WebApplicationContext
ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE, SCOPE_GLOBAL_SESSION, SCOPE_REQUEST, SCOPE_SESSION

 

Fields inherited from interface org.springframework.beans.factory.BeanFactory
FACTORY_BEAN_PREFIX

 

Fields inherited from interface org.springframework.core.io.support.ResourcePatternResolver
CLASSPATH_ALL_URL_PREFIX

 

Fields inherited from interface org.springframework.core.io.ResourceLoader
CLASSPATH_URL_PREFIX

 

Constructor Summary
XmlWebApplicationContext()

 

Method Summary
protected  String[]	getDefaultConfigLocations()           The default location for the root context is "/WEB-INF/applicationContext.xml", and "/WEB-INF/test-servlet.xml" for a context with the namespace "test-servlet" (like for a DispatcherServlet instance with the servlet-name "test").
protected  void	initBeanDefinitionReader(XmlBeanDefinitionReader beanDefinitionReader)           Initialize the bean definition reader used for loading the bean definitions of this context.
protected  void	loadBeanDefinitions(DefaultListableBeanFactory beanFactory)           Loads the bean definitions via an XmlBeanDefinitionReader.
protected  void	loadBeanDefinitions(XmlBeanDefinitionReader reader)           Load the bean definitions with the given XmlBeanDefinitionReader.

 

Methods inherited from class org.springframework.web.context.support.AbstractRefreshableWebApplicationContext
getConfigLocations, getNamespace, getResourceByPath, getResourcePatternResolver, getServletConfig, getServletContext, getTheme, onRefresh, postProcessBeanFactory, resolvePath, setConfigLocations, setNamespace, setServletConfig, setServletContext

 

Methods inherited from class org.springframework.context.support.AbstractRefreshableApplicationContext
closeBeanFactory, createBeanFactory, customizeBeanFactory, getBeanFactory, refreshBeanFactory

 

Methods inherited from class org.springframework.context.support.AbstractApplicationContext

addApplicationListener, addBeanFactoryPostProcessor, addListener, close, containsBean, containsBeanDefinition, containsLocalBean, destroy, destroyBeans, doClose, getAliases, getApplicationListeners, getAutowireCapableBeanFactory, getBean, getBean, getBeanDefinitionCount, getBeanDefinitionNames, getBeanFactoryPostProcessors, getBeanNamesForType, getBeanNamesForType, getBeansOfType, getBeansOfType, getDisplayName, getInternalParentBeanFactory, getInternalParentMessageSource, getLifecycleBeans, getMessage, getMessage, getMessage, getParent, getParentBeanFactory, getResources, getStartupDate, getType, initApplicationEventMulticaster, initMessageSource, invokeBeanFactoryPostProcessors, isActive, isPrototype, isRunning, isSingleton, isTypeMatch, obtainFreshBeanFactory, onClose, prepareBeanFactory, prepareRefresh, publishEvent, refresh, registerBeanPostProcessors, registerListeners, registerShutdownHook, setDisplayName, setParent, start, stop, toString

 

Methods inherited from class org.springframework.core.io.DefaultResourceLoader
getClassLoader, getResource, setClassLoader

 

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

 

Methods inherited from interface org.springframework.context.ConfigurableApplicationContext
addApplicationListener, addBeanFactoryPostProcessor, close, getBeanFactory, isActive, refresh, registerShutdownHook, setParent

 

Methods inherited from interface org.springframework.context.ApplicationContext
getAutowireCapableBeanFactory, getDisplayName, getParent, getStartupDate

 

Methods inherited from interface org.springframework.beans.factory.ListableBeanFactory
containsBeanDefinition, getBeanDefinitionCount, getBeanDefinitionNames, getBeanNamesForType, getBeanNamesForType, getBeansOfType, getBeansOfType

 

Methods inherited from interface org.springframework.beans.factory.HierarchicalBeanFactory
containsLocalBean, getParentBeanFactory

 

Methods inherited from interface org.springframework.beans.factory.BeanFactory
containsBean, getAliases, getBean, getBean, getType, isPrototype, isSingleton, isTypeMatch

 

Methods inherited from interface org.springframework.context.MessageSource
getMessage, getMessage, getMessage

 

Methods inherited from interface org.springframework.context.ApplicationEventPublisher
publishEvent

 

Methods inherited from interface org.springframework.core.io.support.ResourcePatternResolver
getResources

 

Methods inherited from interface org.springframework.core.io.ResourceLoader
getClassLoader, getResource

 

Methods inherited from interface org.springframework.context.Lifecycle
isRunning, start, stop

 

Field Detail

DEFAULT_CONFIG_LOCATION

public static final String DEFAULT_CONFIG_LOCATION

Default config location for the root context

See Also:

Constant Field Values

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DEFAULT_CONFIG_LOCATION_PREFIX

public static final String DEFAULT_CONFIG_LOCATION_PREFIX

Default prefix for building a config location for a namespace

See Also:

Constant Field Values

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DEFAULT_CONFIG_LOCATION_SUFFIX

public static final String DEFAULT_CONFIG_LOCATION_SUFFIX

Default suffix for building a config location for a namespace

See Also:

Constant Field Values

Constructor Detail

XmlWebApplicationContext

public XmlWebApplicationContext()

Method Detail

loadBeanDefinitions

protected void loadBeanDefinitions(DefaultListableBeanFactory beanFactory)
                            throws IOException

Loads the bean definitions via an XmlBeanDefinitionReader.

Specified by:

loadBeanDefinitions in class AbstractRefreshableApplicationContext

Parameters:

beanFactory - the bean factory to load bean definitions into

Throws:

IOException - if loading of bean definition files failed

See Also:

XmlBeanDefinitionReader, initBeanDefinitionReader(org.springframework.beans.factory.xml.XmlBeanDefinitionReader), loadBeanDefinitions(org.springframework.beans.factory.support.DefaultListableBeanFactory)

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initBeanDefinitionReader

protected void initBeanDefinitionReader(XmlBeanDefinitionReader beanDefinitionReader)

Initialize the bean definition reader used for loading the bean definitions of this context. Default implementation is empty.

Can be overridden in subclasses, e.g. for turning off XML validation or using a different XmlBeanDefinitionParser implementation.

Parameters:

beanDefinitionReader - the bean definition reader used by this context

See Also:

XmlBeanDefinitionReader.setValidationMode(int), XmlBeanDefinitionReader.setDocumentReaderClass(java.lang.Class)

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loadBeanDefinitions

protected void loadBeanDefinitions(XmlBeanDefinitionReader reader)
                            throws BeansException,
                                   IOException

Load the bean definitions with the given XmlBeanDefinitionReader.

The lifecycle of the bean factory is handled by the refreshBeanFactory method; therefore this method is just supposed to load and/or register bean definitions.

Delegates to a ResourcePatternResolver for resolving location patterns into Resource instances.

Throws:

BeansException - in case of bean registration errors

IOException - if the required XML document isn't found

See Also:

AbstractRefreshableApplicationContext.refreshBeanFactory(), AbstractRefreshableWebApplicationContext.getConfigLocations(), AbstractApplicationContext.getResources(java.lang.String), AbstractRefreshableWebApplicationContext.getResourcePatternResolver()

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getDefaultConfigLocations

protected String[] getDefaultConfigLocations()

The default location for the root context is "/WEB-INF/applicationContext.xml", and "/WEB-INF/test-servlet.xml" for a context with the namespace "test-servlet" (like for a DispatcherServlet instance with the servlet-name "test").

Overrides:

getDefaultConfigLocations in class AbstractRefreshableWebApplicationContext

See Also:

AbstractRefreshableWebApplicationContext.setConfigLocations(java.lang.String[])

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