Spring 学习记录5 BeanFactory

主题

记录我对BeanFactor接口的简单的学习.

BeanFactory我感觉就是管理bean用的容器,持有一堆的bean,你可以get各种bean.然后也提供一些bean相关的功能比如别名呀之类的..

结构

我觉得核心功能都写在了3个子接口里面了.

小实验:

     /**
      * 测试BeanFactory
      */
     @Test
     public void testBeanFactory() {
         BeanFactory beanFactory = this.applicationContext;
         System.out.println(beanFactory.getBean("myBeanFactoryTestBean")); // spring.BeanFactoryTest@484b2882

         System.out.println(beanFactory.getBean(Environment.class)); // StandardEnvironment {activeProfiles=[], defaultProfiles=[default], propertySources=[systemProperties,systemEnvironment,class path resource [test.properties]]}

         System.out.println(beanFactory.getBean("myFactoryBean-1")); // java.lang.Object@327ac9a7
         System.out.println(beanFactory.getBean("myFactoryBean-1")); // java.lang.Object@5f8581f3
         System.out.println(beanFactory.isSingleton("myFactoryBean-1")); // false
         System.out.println(beanFactory.getBean("&myFactoryBean-1")); // spring.MyFactoryBean@1b4d0cd5 &开头的是FactoryBean
         System.out.println(beanFactory.isSingleton("&myFactoryBean-1")); // true

         // System.out.println(beanFactory.getBean("not exists bean")); // 异常
     }

HierarchicalBeanFactory

 /*
  * Copyright 2002-2012 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package org.springframework.beans.factory;

 /**
  * Sub-interface implemented by bean factories that can be part
  * of a hierarchy.
  *
  * <p>The corresponding {@code setParentBeanFactory} method for bean
  * factories that allow setting the parent in a configurable
  * fashion can be found in the ConfigurableBeanFactory interface.
  *
  * @author Rod Johnson
  * @author Juergen Hoeller
  * @since 07.07.2003
  * @see org.springframework.beans.factory.config.ConfigurableBeanFactory#setParentBeanFactory
  */
 public interface HierarchicalBeanFactory extends BeanFactory {

     /**
      * Return the parent bean factory, or {@code null} if there is none.
      */
     BeanFactory getParentBeanFactory();

     /**
      * Return whether the local bean factory contains a bean of the given name,
      * ignoring beans defined in ancestor contexts.
      * <p>This is an alternative to {@code containsBean}, ignoring a bean
      * of the given name from an ancestor bean factory.
      * @param name the name of the bean to query
      * @return whether a bean with the given name is defined in the local factory
      * @see BeanFactory#containsBean
      */
     boolean containsLocalBean(String name);

 }

这个接口还是比较简单的,从这个接口中我们可以学习到BeanFactory是可以有层级的.

getParentBeanFactory方法可以获取父级BeanFactory

containsLocalBean方法用途判断当前这个beanFactory是否包含需要的bean

如果要从当前BF或者祖先BF里获取bean可以使用Spring的1个Utils叫做BeanFactoryUtils来帮忙..它里面很多方法都是XXXXIncludingAncestors这些方法不光从本BF中找bean,还可以遍历祖先BF.

ListableBeanFactory

 /*
  * Copyright 2002-2013 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package org.springframework.beans.factory;

 import java.lang.annotation.Annotation;
 import java.util.Map;

 import org.springframework.beans.BeansException;

 /**
  * Extension of the {@link BeanFactory} interface to be implemented by bean factories
  * that can enumerate all their bean instances, rather than attempting bean lookup
  * by name one by one as requested by clients. BeanFactory implementations that
  * preload all their bean definitions (such as XML-based factories) may implement
  * this interface.
  *
  * <p>If this is a {@link HierarchicalBeanFactory}, the return values will <i>not</i>
  * take any BeanFactory hierarchy into account, but will relate only to the beans
  * defined in the current factory. Use the {@link BeanFactoryUtils} helper class
  * to consider beans in ancestor factories too.
  *
  * <p>The methods in this interface will just respect bean definitions of this factory.
  * They will ignore any singleton beans that have been registered by other means like
  * {@link org.springframework.beans.factory.config.ConfigurableBeanFactory}'s
  * {@code registerSingleton} method, with the exception of
  * {@code getBeanNamesOfType} and {@code getBeansOfType} which will check
  * such manually registered singletons too. Of course, BeanFactory's {@code getBean}
  * does allow transparent access to such special beans as well. However, in typical
  * scenarios, all beans will be defined by external bean definitions anyway, so most
  * applications don't need to worry about this differentiation.
  *
  * <p><b>NOTE:</b> With the exception of {@code getBeanDefinitionCount}
  * and {@code containsBeanDefinition}, the methods in this interface
  * are not designed for frequent invocation. Implementations may be slow.
  *
  * @author Rod Johnson
  * @author Juergen Hoeller
  * @since 16 April 2001
  * @see HierarchicalBeanFactory
  * @see BeanFactoryUtils
  */
 public interface ListableBeanFactory extends BeanFactory {

     /**
      * Check if this bean factory contains a bean definition with the given name.
      * <p>Does not consider any hierarchy this factory may participate in,
      * and ignores any singleton beans that have been registered by
      * other means than bean definitions.
      * @param beanName the name of the bean to look for
      * @return if this bean factory contains a bean definition with the given name
      * @see #containsBean
      */
     boolean containsBeanDefinition(String beanName);

     /**
      * Return the number of beans defined in the factory.
      * <p>Does not consider any hierarchy this factory may participate in,
      * and ignores any singleton beans that have been registered by
      * other means than bean definitions.
      * @return the number of beans defined in the factory
      */
     int getBeanDefinitionCount();

     /**
      * Return the names of all beans defined in this factory.
      * <p>Does not consider any hierarchy this factory may participate in,
      * and ignores any singleton beans that have been registered by
      * other means than bean definitions.
      * @return the names of all beans defined in this factory,
      * or an empty array if none defined
      */
     String[] getBeanDefinitionNames();

     /**
      * Return the names of beans matching the given type (including subclasses),
      * judging from either bean definitions or the value of {@code getObjectType}
      * in the case of FactoryBeans.
      * <p><b>NOTE: This method introspects top-level beans only.</b> It does <i>not</i>
      * check nested beans which might match the specified type as well.
      * <p>Does consider objects created by FactoryBeans, which means that FactoryBeans
      * will get initialized. If the object created by the FactoryBean doesn't match,
      * the raw FactoryBean itself will be matched against the type.
      * <p>Does not consider any hierarchy this factory may participate in.
      * Use BeanFactoryUtils' {@code beanNamesForTypeIncludingAncestors}
      * to include beans in ancestor factories too.
      * <p>Note: Does <i>not</i> ignore singleton beans that have been registered
      * by other means than bean definitions.
      * <p>This version of {@code getBeanNamesForType} matches all kinds of beans,
      * be it singletons, prototypes, or FactoryBeans. In most implementations, the
      * result will be the same as for {@code getBeanNamesForType(type, true, true)}.
      * <p>Bean names returned by this method should always return bean names <i>in the
      * order of definition</i> in the backend configuration, as far as possible.
      * @param type the class or interface to match, or {@code null} for all bean names
      * @return the names of beans (or objects created by FactoryBeans) matching
      * the given object type (including subclasses), or an empty array if none
      * @see FactoryBean#getObjectType
      * @see BeanFactoryUtils#beanNamesForTypeIncludingAncestors(ListableBeanFactory, Class)
      */
     String[] getBeanNamesForType(Class<?> type);

     /**
      * Return the names of beans matching the given type (including subclasses),
      * judging from either bean definitions or the value of {@code getObjectType}
      * in the case of FactoryBeans.
      * <p><b>NOTE: This method introspects top-level beans only.</b> It does <i>not</i>
      * check nested beans which might match the specified type as well.
      * <p>Does consider objects created by FactoryBeans if the "allowEagerInit" flag is set,
      * which means that FactoryBeans will get initialized. If the object created by the
      * FactoryBean doesn't match, the raw FactoryBean itself will be matched against the
      * type. If "allowEagerInit" is not set, only raw FactoryBeans will be checked
      * (which doesn't require initialization of each FactoryBean).
      * <p>Does not consider any hierarchy this factory may participate in.
      * Use BeanFactoryUtils' {@code beanNamesForTypeIncludingAncestors}
      * to include beans in ancestor factories too.
      * <p>Note: Does <i>not</i> ignore singleton beans that have been registered
      * by other means than bean definitions.
      * <p>Bean names returned by this method should always return bean names <i>in the
      * order of definition</i> in the backend configuration, as far as possible.
      * @param type the class or interface to match, or {@code null} for all bean names
      * @param includeNonSingletons whether to include prototype or scoped beans too
      * or just singletons (also applies to FactoryBeans)
      * @param allowEagerInit whether to initialize <i>lazy-init singletons</i> and
      * <i>objects created by FactoryBeans</i> (or by factory methods with a
      * "factory-bean" reference) for the type check. Note that FactoryBeans need to be
      * eagerly initialized to determine their type: So be aware that passing in "true"
      * for this flag will initialize FactoryBeans and "factory-bean" references.
      * @return the names of beans (or objects created by FactoryBeans) matching
      * the given object type (including subclasses), or an empty array if none
      * @see FactoryBean#getObjectType
      * @see BeanFactoryUtils#beanNamesForTypeIncludingAncestors(ListableBeanFactory, Class, boolean, boolean)
      */
     String[] getBeanNamesForType(Class<?> type, boolean includeNonSingletons, boolean allowEagerInit);

     /**
      * Return the bean instances that match the given object type (including
      * subclasses), judging from either bean definitions or the value of
      * {@code getObjectType} in the case of FactoryBeans.
      * <p><b>NOTE: This method introspects top-level beans only.</b> It does <i>not</i>
      * check nested beans which might match the specified type as well.
      * <p>Does consider objects created by FactoryBeans, which means that FactoryBeans
      * will get initialized. If the object created by the FactoryBean doesn't match,
      * the raw FactoryBean itself will be matched against the type.
      * <p>Does not consider any hierarchy this factory may participate in.
      * Use BeanFactoryUtils' {@code beansOfTypeIncludingAncestors}
      * to include beans in ancestor factories too.
      * <p>Note: Does <i>not</i> ignore singleton beans that have been registered
      * by other means than bean definitions.
      * <p>This version of getBeansOfType matches all kinds of beans, be it
      * singletons, prototypes, or FactoryBeans. In most implementations, the
      * result will be the same as for {@code getBeansOfType(type, true, true)}.
      * <p>The Map returned by this method should always return bean names and
      * corresponding bean instances <i>in the order of definition</i> in the
      * backend configuration, as far as possible.
      * @param type the class or interface to match, or {@code null} for all concrete beans
      * @return a Map with the matching beans, containing the bean names as
      * keys and the corresponding bean instances as values
      * @throws BeansException if a bean could not be created
      * @since 1.1.2
      * @see FactoryBean#getObjectType
      * @see BeanFactoryUtils#beansOfTypeIncludingAncestors(ListableBeanFactory, Class)
      */
     <T> Map<String, T> getBeansOfType(Class<T> type) throws BeansException;

     /**
      * Return the bean instances that match the given object type (including
      * subclasses), judging from either bean definitions or the value of
      * {@code getObjectType} in the case of FactoryBeans.
      * <p><b>NOTE: This method introspects top-level beans only.</b> It does <i>not</i>
      * check nested beans which might match the specified type as well.
      * <p>Does consider objects created by FactoryBeans if the "allowEagerInit" flag is set,
      * which means that FactoryBeans will get initialized. If the object created by the
      * FactoryBean doesn't match, the raw FactoryBean itself will be matched against the
      * type. If "allowEagerInit" is not set, only raw FactoryBeans will be checked
      * (which doesn't require initialization of each FactoryBean).
      * <p>Does not consider any hierarchy this factory may participate in.
      * Use BeanFactoryUtils' {@code beansOfTypeIncludingAncestors}
      * to include beans in ancestor factories too.
      * <p>Note: Does <i>not</i> ignore singleton beans that have been registered
      * by other means than bean definitions.
      * <p>The Map returned by this method should always return bean names and
      * corresponding bean instances <i>in the order of definition</i> in the
      * backend configuration, as far as possible.
      * @param type the class or interface to match, or {@code null} for all concrete beans
      * @param includeNonSingletons whether to include prototype or scoped beans too
      * or just singletons (also applies to FactoryBeans)
      * @param allowEagerInit whether to initialize <i>lazy-init singletons</i> and
      * <i>objects created by FactoryBeans</i> (or by factory methods with a
      * "factory-bean" reference) for the type check. Note that FactoryBeans need to be
      * eagerly initialized to determine their type: So be aware that passing in "true"
      * for this flag will initialize FactoryBeans and "factory-bean" references.
      * @return a Map with the matching beans, containing the bean names as
      * keys and the corresponding bean instances as values
      * @throws BeansException if a bean could not be created
      * @see FactoryBean#getObjectType
      * @see BeanFactoryUtils#beansOfTypeIncludingAncestors(ListableBeanFactory, Class, boolean, boolean)
      */
     <T> Map<String, T> getBeansOfType(Class<T> type, boolean includeNonSingletons, boolean allowEagerInit)
             throws BeansException;

     /**
      * Find all names of beans whose {@code Class} has the supplied {@link Annotation}
      * type, without creating any bean instances yet.
      * @param annotationType the type of annotation to look for
      * @return the names of all matching beans
      * @since 4.0
      */
     String[] getBeanNamesForAnnotation(Class<? extends Annotation> annotationType);

     /**
      * Find all beans whose {@code Class} has the supplied {@link Annotation} type,
      * returning a Map of bean names with corresponding bean instances.
      * @param annotationType the type of annotation to look for
      * @return a Map with the matching beans, containing the bean names as
      * keys and the corresponding bean instances as values
      * @throws BeansException if a bean could not be created
      * @since 3.0
      */
     Map<String, Object> getBeansWithAnnotation(Class<? extends Annotation> annotationType) throws BeansException;

     /**
      * Find an {@link Annotation} of {@code annotationType} on the specified
      * bean, traversing its interfaces and super classes if no annotation can be
      * found on the given class itself.
      * @param beanName the name of the bean to look for annotations on
      * @param annotationType the annotation class to look for
      * @return the annotation of the given type if found, or {@code null}
      * @throws NoSuchBeanDefinitionException if there is no bean with the given name
      * @since 3.0
      */
     <A extends Annotation> A findAnnotationOnBean(String beanName, Class<A> annotationType)
             throws NoSuchBeanDefinitionException;

 }

这个接口给予了批量获取bean的能力,一般的BF只能获取单个bean,但是这个接口可以获取满足条件的一堆bean.

我觉得用的比较多的可能是

<T> Map<String, T> getBeansOfType(Class<T> type) throws BeansException;

Map<String, Object> getBeansWithAnnotation(Class<? extends Annotation> annotationType) throws BeansException;

这2个方法..

如果自己的bean有一些地方要特殊处理的.可能会自己写1个bean实现InitializingBean接口在afterPropertiesSet方法里通过这个接口取出所有bean然后去遍历,找到你要的bean然后再做特殊处理.

小实验:

     /**
      * ListableBeanFactory HierarchicalBeanFactory 测试
      */
     @Test
     public void testListableBeanFactoryAndHierarchicalBeanFactory() {
         // ListableBeanFactory里的方法不会考虑parent里的bean
         DefaultListableBeanFactory beanFactory = (DefaultListableBeanFactory) this.applicationContext.getAutowireCapableBeanFactory(); // DefaultListableBeanFactory
         DefaultListableBeanFactory child = new DefaultListableBeanFactory();
         child.setParentBeanFactory(beanFactory); // 设置

         System.out.println(child.getBeansOfType(BeanFactoryTest.class)); // {}
         System.out.println(child.containsLocalBean("myBeanFactoryTestBean")); // false
         System.out.println(child.containsBean("myBeanFactoryTestBean")); // true
         System.out.println(BeanFactoryUtils.beansOfTypeIncludingAncestors(child, BeanFactoryTest.class)); // {myBeanFactoryTestBean=spring.BeanFactoryTest@3616a983}

         System.out.println(child.getBeansWithAnnotation(RunWith.class)); // {}
         System.out.println(beanFactory.getBeansWithAnnotation(RunWith.class)); // {myBeanFactoryTestBean=spring.BeanFactoryTest@3616a983}
     }

AutowireCapableBeanFactory

 /*
  * Copyright 2002-2013 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package org.springframework.beans.factory.config;

 import java.util.Set;

 import org.springframework.beans.BeansException;
 import org.springframework.beans.TypeConverter;
 import org.springframework.beans.factory.BeanFactory;

 /**
  * Extension of the {@link org.springframework.beans.factory.BeanFactory}
  * interface to be implemented by bean factories that are capable of
  * autowiring, provided that they want to expose this functionality for
  * existing bean instances.
  *
  * <p>This subinterface of BeanFactory is not meant to be used in normal
  * application code: stick to {@link org.springframework.beans.factory.BeanFactory}
  * or {@link org.springframework.beans.factory.ListableBeanFactory} for
  * typical use cases.
  *
  * <p>Integration code for other frameworks can leverage this interface to
  * wire and populate existing bean instances that Spring does not control
  * the lifecycle of. This is particularly useful for WebWork Actions and
  * Tapestry Page objects, for example.
  *
  * <p>Note that this interface is not implemented by
  * {@link org.springframework.context.ApplicationContext} facades,
  * as it is hardly ever used by application code. That said, it is available
  * from an application context too, accessible through ApplicationContext's
  * {@link org.springframework.context.ApplicationContext#getAutowireCapableBeanFactory()}
  * method.
  *
  * <p>You may also implement the {@link org.springframework.beans.factory.BeanFactoryAware}
  * interface, which exposes the internal BeanFactory even when running in an
  * ApplicationContext, to get access to an AutowireCapableBeanFactory:
  * simply cast the passed-in BeanFactory to AutowireCapableBeanFactory.
  *
  * @author Juergen Hoeller
  * @since 04.12.2003
  * @see org.springframework.beans.factory.BeanFactoryAware
  * @see org.springframework.beans.factory.config.ConfigurableListableBeanFactory
  * @see org.springframework.context.ApplicationContext#getAutowireCapableBeanFactory()
  */
 public interface AutowireCapableBeanFactory extends BeanFactory {

     /**
      * Constant that indicates no externally defined autowiring. Note that
      * BeanFactoryAware etc and annotation-driven injection will still be applied.
      * @see #createBean
      * @see #autowire
      * @see #autowireBeanProperties
      */
     int AUTOWIRE_NO = 0;

     /**
      * Constant that indicates autowiring bean properties by name
      * (applying to all bean property setters).
      * @see #createBean
      * @see #autowire
      * @see #autowireBeanProperties
      */
     int AUTOWIRE_BY_NAME = 1;

     /**
      * Constant that indicates autowiring bean properties by type
      * (applying to all bean property setters).
      * @see #createBean
      * @see #autowire
      * @see #autowireBeanProperties
      */
     int AUTOWIRE_BY_TYPE = 2;

     /**
      * Constant that indicates autowiring the greediest constructor that
      * can be satisfied (involves resolving the appropriate constructor).
      * @see #createBean
      * @see #autowire
      */
     int AUTOWIRE_CONSTRUCTOR = 3;

     /**
      * Constant that indicates determining an appropriate autowire strategy
      * through introspection of the bean class.
      * @see #createBean
      * @see #autowire
      * @deprecated as of Spring 3.0: If you are using mixed autowiring strategies,
      * prefer annotation-based autowiring for clearer demarcation of autowiring needs.
      */
     @Deprecated
     int AUTOWIRE_AUTODETECT = 4;

     //-------------------------------------------------------------------------
     // Typical methods for creating and populating external bean instances
     //-------------------------------------------------------------------------

     /**
      * Fully create a new bean instance of the given class.
      * <p>Performs full initialization of the bean, including all applicable
      * {@link BeanPostProcessor BeanPostProcessors}.
      * <p>Note: This is intended for creating a fresh instance, populating annotated
      * fields and methods as well as applying all standard bean initialiation callbacks.
      * It does <i>not</> imply traditional by-name or by-type autowiring of properties;
      * use {@link #createBean(Class, int, boolean)} for that purposes.
      * @param beanClass the class of the bean to create
      * @return the new bean instance
      * @throws BeansException if instantiation or wiring failed
      */
     <T> T createBean(Class<T> beanClass) throws BeansException;

     /**
      * Populate the given bean instance through applying after-instantiation callbacks
      * and bean property post-processing (e.g. for annotation-driven injection).
      * <p>Note: This is essentially intended for (re-)populating annotated fields and
      * methods, either for new instances or for deserialized instances. It does
      * <i>not</i> imply traditional by-name or by-type autowiring of properties;
      * use {@link #autowireBeanProperties} for that purposes.
      * @param existingBean the existing bean instance
      * @throws BeansException if wiring failed
      */
     void autowireBean(Object existingBean) throws BeansException;

     /**
      * Configure the given raw bean: autowiring bean properties, applying
      * bean property values, applying factory callbacks such as {@code setBeanName}
      * and {@code setBeanFactory}, and also applying all bean post processors
      * (including ones which might wrap the given raw bean).
      * <p>This is effectively a superset of what {@link #initializeBean} provides,
      * fully applying the configuration specified by the corresponding bean definition.
      * <b>Note: This method requires a bean definition for the given name!</b>
      * @param existingBean the existing bean instance
      * @param beanName the name of the bean, to be passed to it if necessary
      * (a bean definition of that name has to be available)
      * @return the bean instance to use, either the original or a wrapped one
      * @throws org.springframework.beans.factory.NoSuchBeanDefinitionException
      * if there is no bean definition with the given name
      * @throws BeansException if the initialization failed
      * @see #initializeBean
      */
     Object configureBean(Object existingBean, String beanName) throws BeansException;

     /**
      * Resolve the specified dependency against the beans defined in this factory.
      * @param descriptor the descriptor for the dependency
      * @param beanName the name of the bean which declares the present dependency
      * @return the resolved object, or {@code null} if none found
      * @throws BeansException in dependency resolution failed
      */
     Object resolveDependency(DependencyDescriptor descriptor, String beanName) throws BeansException;

     //-------------------------------------------------------------------------
     // Specialized methods for fine-grained control over the bean lifecycle
     //-------------------------------------------------------------------------

     /**
      * Fully create a new bean instance of the given class with the specified
      * autowire strategy. All constants defined in this interface are supported here.
      * <p>Performs full initialization of the bean, including all applicable
      * {@link BeanPostProcessor BeanPostProcessors}. This is effectively a superset
      * of what {@link #autowire} provides, adding {@link #initializeBean} behavior.
      * @param beanClass the class of the bean to create
      * @param autowireMode by name or type, using the constants in this interface
      * @param dependencyCheck whether to perform a dependency check for objects
      * (not applicable to autowiring a constructor, thus ignored there)
      * @return the new bean instance
      * @throws BeansException if instantiation or wiring failed
      * @see #AUTOWIRE_NO
      * @see #AUTOWIRE_BY_NAME
      * @see #AUTOWIRE_BY_TYPE
      * @see #AUTOWIRE_CONSTRUCTOR
      */
     Object createBean(Class<?> beanClass, int autowireMode, boolean dependencyCheck) throws BeansException;

     /**
      * Instantiate a new bean instance of the given class with the specified autowire
      * strategy. All constants defined in this interface are supported here.
      * Can also be invoked with {@code AUTOWIRE_NO} in order to just apply
      * before-instantiation callbacks (e.g. for annotation-driven injection).
      * <p>Does <i>not</i> apply standard {@link BeanPostProcessor BeanPostProcessors}
      * callbacks or perform any further initialization of the bean. This interface
      * offers distinct, fine-grained operations for those purposes, for example
      * {@link #initializeBean}. However, {@link InstantiationAwareBeanPostProcessor}
      * callbacks are applied, if applicable to the construction of the instance.
      * @param beanClass the class of the bean to instantiate
      * @param autowireMode by name or type, using the constants in this interface
      * @param dependencyCheck whether to perform a dependency check for object
      * references in the bean instance (not applicable to autowiring a constructor,
      * thus ignored there)
      * @return the new bean instance
      * @throws BeansException if instantiation or wiring failed
      * @see #AUTOWIRE_NO
      * @see #AUTOWIRE_BY_NAME
      * @see #AUTOWIRE_BY_TYPE
      * @see #AUTOWIRE_CONSTRUCTOR
      * @see #AUTOWIRE_AUTODETECT
      * @see #initializeBean
      * @see #applyBeanPostProcessorsBeforeInitialization
      * @see #applyBeanPostProcessorsAfterInitialization
      */
     Object autowire(Class<?> beanClass, int autowireMode, boolean dependencyCheck) throws BeansException;

     /**
      * Autowire the bean properties of the given bean instance by name or type.
      * Can also be invoked with {@code AUTOWIRE_NO} in order to just apply
      * after-instantiation callbacks (e.g. for annotation-driven injection).
      * <p>Does <i>not</i> apply standard {@link BeanPostProcessor BeanPostProcessors}
      * callbacks or perform any further initialization of the bean. This interface
      * offers distinct, fine-grained operations for those purposes, for example
      * {@link #initializeBean}. However, {@link InstantiationAwareBeanPostProcessor}
      * callbacks are applied, if applicable to the configuration of the instance.
      * @param existingBean the existing bean instance
      * @param autowireMode by name or type, using the constants in this interface
      * @param dependencyCheck whether to perform a dependency check for object
      * references in the bean instance
      * @throws BeansException if wiring failed
      * @see #AUTOWIRE_BY_NAME
      * @see #AUTOWIRE_BY_TYPE
      * @see #AUTOWIRE_NO
      */
     void autowireBeanProperties(Object existingBean, int autowireMode, boolean dependencyCheck)
             throws BeansException;

     /**
      * Apply the property values of the bean definition with the given name to
      * the given bean instance. The bean definition can either define a fully
      * self-contained bean, reusing its property values, or just property values
      * meant to be used for existing bean instances.
      * <p>This method does <i>not</i> autowire bean properties; it just applies
      * explicitly defined property values. Use the {@link #autowireBeanProperties}
      * method to autowire an existing bean instance.
      * <b>Note: This method requires a bean definition for the given name!</b>
      * <p>Does <i>not</i> apply standard {@link BeanPostProcessor BeanPostProcessors}
      * callbacks or perform any further initialization of the bean. This interface
      * offers distinct, fine-grained operations for those purposes, for example
      * {@link #initializeBean}. However, {@link InstantiationAwareBeanPostProcessor}
      * callbacks are applied, if applicable to the configuration of the instance.
      * @param existingBean the existing bean instance
      * @param beanName the name of the bean definition in the bean factory
      * (a bean definition of that name has to be available)
      * @throws org.springframework.beans.factory.NoSuchBeanDefinitionException
      * if there is no bean definition with the given name
      * @throws BeansException if applying the property values failed
      * @see #autowireBeanProperties
      */
     void applyBeanPropertyValues(Object existingBean, String beanName) throws BeansException;

     /**
      * Initialize the given raw bean, applying factory callbacks
      * such as {@code setBeanName} and {@code setBeanFactory},
      * also applying all bean post processors (including ones which
      * might wrap the given raw bean).
      * <p>Note that no bean definition of the given name has to exist
      * in the bean factory. The passed-in bean name will simply be used
      * for callbacks but not checked against the registered bean definitions.
      * @param existingBean the existing bean instance
      * @param beanName the name of the bean, to be passed to it if necessary
      * (only passed to {@link BeanPostProcessor BeanPostProcessors})
      * @return the bean instance to use, either the original or a wrapped one
      * @throws BeansException if the initialization failed
      */
     Object initializeBean(Object existingBean, String beanName) throws BeansException;

     /**
      * Apply {@link BeanPostProcessor BeanPostProcessors} to the given existing bean
      * instance, invoking their {@code postProcessBeforeInitialization} methods.
      * The returned bean instance may be a wrapper around the original.
      * @param existingBean the new bean instance
      * @param beanName the name of the bean
      * @return the bean instance to use, either the original or a wrapped one
      * @throws BeansException if any post-processing failed
      * @see BeanPostProcessor#postProcessBeforeInitialization
      */
     Object applyBeanPostProcessorsBeforeInitialization(Object existingBean, String beanName)
             throws BeansException;

     /**
      * Apply {@link BeanPostProcessor BeanPostProcessors} to the given existing bean
      * instance, invoking their {@code postProcessAfterInitialization} methods.
      * The returned bean instance may be a wrapper around the original.
      * @param existingBean the new bean instance
      * @param beanName the name of the bean
      * @return the bean instance to use, either the original or a wrapped one
      * @throws BeansException if any post-processing failed
      * @see BeanPostProcessor#postProcessAfterInitialization
      */
     Object applyBeanPostProcessorsAfterInitialization(Object existingBean, String beanName)
             throws BeansException;

     /**
      * Destroy the given bean instance (typically coming from {@link #createBean}),
      * applying the {@link org.springframework.beans.factory.DisposableBean} contract as well as
      * registered {@link DestructionAwareBeanPostProcessor DestructionAwareBeanPostProcessors}.
      * <p>Any exception that arises during destruction should be caught
      * and logged instead of propagated to the caller of this method.
      * @param existingBean the bean instance to destroy
      */
     void destroyBean(Object existingBean);

     /**
      * Resolve the specified dependency against the beans defined in this factory.
      * @param descriptor the descriptor for the dependency
      * @param beanName the name of the bean which declares the present dependency
      * @param autowiredBeanNames a Set that all names of autowired beans (used for
      * resolving the present dependency) are supposed to be added to
      * @param typeConverter the TypeConverter to use for populating arrays and
      * collections
      * @return the resolved object, or {@code null} if none found
      * @throws BeansException in dependency resolution failed
      */
     Object resolveDependency(DependencyDescriptor descriptor, String beanName,
             Set<String> autowiredBeanNames, TypeConverter typeConverter) throws BeansException;

 }

这个接口我一直没用过..介绍里写可能用到的情况不多...

如果其他框架会产生一些不由Spring管理生命周期的bean的话可以通过这个接口取装配Bean.介绍里举了2个例子: WebWork Actions and Tapestry Page objects

小实验:接口里的方法我也没有仔细全部测,测了几个我觉得以后自己可能会用到的.因为我感觉用到这个接口的机会真的蛮小的.

     /**
      * AutowireCapableBeanFactory 测试
      */
     @Test
     public void testAutowireCapableBeanFactory() {
         AutowireCapableBeanFactory autowireCapableBeanFactory = this.applicationContext.getAutowireCapableBeanFactory();// DefaultListableBeanFactory
         BeanFactoryTest_Bean1 bean = new BeanFactoryTest_Bean1();
         autowireCapableBeanFactory.autowireBean(bean);
         System.out.println(bean); // BeanFactoryTest_Bean1{beanFactoryTest=spring.BeanFactoryTest@22088c28, myFactoryBean=spring.MyFactoryBean@5f29a78c, o=java.lang.Object@27b70923}

         System.out.println(autowireCapableBeanFactory.createBean(BeanFactoryTest_Bean1.class)); // BeanFactoryTest_Bean1{beanFactoryTest=spring.BeanFactoryTest@22088c28, myFactoryBean=spring.MyFactoryBean@5f29a78c, o=java.lang.Object@33dce164}
         System.out.println(autowireCapableBeanFactory.containsBean("beanFactoryTest_Bean1")); // false
     }

1.如果自己new了1个对象,可以通过autowireCapableBeanFactory.autowireBean(bean);去装配这个对象.我在对象里是通过@Autowired去标注装配什么对象的.

因为对象是自己new的,所以不会做BeanPostProcessor里的postProcessBeforeInitialization方法和postProcessAfterInitialization方法

2.如果是autowireCapableBeanFactory.createBean(BeanFactoryTest_Bean1.class)方法,除了装配以外还会做postProcessBeforeInitialization和postProcessAfterInitialization方法.

完整输出:

postProcessAfterInitialization=====myFactoryBean-1
BeanFactoryTest_Bean1{beanFactoryTest=spring.BeanFactoryTest@494f0b41, myFactoryBean=spring.MyFactoryBean@646bfe00, o=java.lang.Object@6df0e581}
postProcessAfterInitialization=====myFactoryBean-1
postProcessBeforeInitialization=====spring.BeanFactoryTest$BeanFactoryTest_Bean1
postProcessAfterInitialization=====spring.BeanFactoryTest$BeanFactoryTest_Bean1
BeanFactoryTest_Bean1{beanFactoryTest=spring.BeanFactoryTest@494f0b41, myFactoryBean=spring.MyFactoryBean@646bfe00, o=java.lang.Object@55a71fa6}
false

同时还有个小发现.myFactoryBean-1是一个由FactoryBean生成的对象,这些工厂对象生成的bean似乎不会做postProcessBeforeInitialization,只会做postProcessAfterInitialization.可能是因为你工厂没有做getObject之前Spring没有你的bean,所以不能postProcessBeforeInitialization的原因吧.      后来查了下资料.postProcessBeforeInitialization也是在new了以后设置了属性之后的....我觉得.可能是其他bean的afterProperties可能会扫描一些特性的bean做处理..这里工厂返回的bean肯定没有被之前扫描到.而postProcessBeforeInitialization是要在afterProperties之前做的(单个bean来说).所以这里不再执行.

ConfigurableBeanFactory

 /*
  * Copyright 2002-2012 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package org.springframework.beans.factory.config;

 import java.beans.PropertyEditor;
 import java.security.AccessControlContext;

 import org.springframework.beans.PropertyEditorRegistrar;
 import org.springframework.beans.PropertyEditorRegistry;
 import org.springframework.beans.TypeConverter;
 import org.springframework.beans.factory.BeanDefinitionStoreException;
 import org.springframework.beans.factory.BeanFactory;
 import org.springframework.beans.factory.HierarchicalBeanFactory;
 import org.springframework.beans.factory.NoSuchBeanDefinitionException;
 import org.springframework.core.convert.ConversionService;
 import org.springframework.util.StringValueResolver;

 /**
  * Configuration interface to be implemented by most bean factories. Provides
  * facilities to configure a bean factory, in addition to the bean factory
  * client methods in the {@link org.springframework.beans.factory.BeanFactory}
  * interface.
  *
  * <p>This bean factory interface is not meant to be used in normal application
  * code: Stick to {@link org.springframework.beans.factory.BeanFactory} or
  * {@link org.springframework.beans.factory.ListableBeanFactory} for typical
  * needs. This extended interface is just meant to allow for framework-internal
  * plug'n'play and for special access to bean factory configuration methods.
  *
  * @author Juergen Hoeller
  * @since 03.11.2003
  * @see org.springframework.beans.factory.BeanFactory
  * @see org.springframework.beans.factory.ListableBeanFactory
  * @see ConfigurableListableBeanFactory
  */
 public interface ConfigurableBeanFactory extends HierarchicalBeanFactory, SingletonBeanRegistry {

     /**
      * Scope identifier for the standard singleton scope: "singleton".
      * Custom scopes can be added via {@code registerScope}.
      * @see #registerScope
      */
     String SCOPE_SINGLETON = "singleton";

     /**
      * Scope identifier for the standard prototype scope: "prototype".
      * Custom scopes can be added via {@code registerScope}.
      * @see #registerScope
      */
     String SCOPE_PROTOTYPE = "prototype";

     /**
      * Set the parent of this bean factory.
      * <p>Note that the parent cannot be changed: It should only be set outside
      * a constructor if it isn't available at the time of factory instantiation.
      * @param parentBeanFactory the parent BeanFactory
      * @throws IllegalStateException if this factory is already associated with
      * a parent BeanFactory
      * @see #getParentBeanFactory()
      */
     void setParentBeanFactory(BeanFactory parentBeanFactory) throws IllegalStateException;

     /**
      * Set the class loader to use for loading bean classes.
      * Default is the thread context class loader.
      * <p>Note that this class loader will only apply to bean definitions
      * that do not carry a resolved bean class yet. This is the case as of
      * Spring 2.0 by default: Bean definitions only carry bean class names,
      * to be resolved once the factory processes the bean definition.
      * @param beanClassLoader the class loader to use,
      * or {@code null} to suggest the default class loader
      */
     void setBeanClassLoader(ClassLoader beanClassLoader);

     /**
      * Return this factory's class loader for loading bean classes.
      */
     ClassLoader getBeanClassLoader();

     /**
      * Specify a temporary ClassLoader to use for type matching purposes.
      * Default is none, simply using the standard bean ClassLoader.
      * <p>A temporary ClassLoader is usually just specified if
      * <i>load-time weaving</i> is involved, to make sure that actual bean
      * classes are loaded as lazily as possible. The temporary loader is
      * then removed once the BeanFactory completes its bootstrap phase.
      * @since 2.5
      */
     void setTempClassLoader(ClassLoader tempClassLoader);

     /**
      * Return the temporary ClassLoader to use for type matching purposes,
      * if any.
      * @since 2.5
      */
     ClassLoader getTempClassLoader();

     /**
      * Set whether to cache bean metadata such as given bean definitions
      * (in merged fashion) and resolved bean classes. Default is on.
      * <p>Turn this flag off to enable hot-refreshing of bean definition objects
      * and in particular bean classes. If this flag is off, any creation of a bean
      * instance will re-query the bean class loader for newly resolved classes.
      */
     void setCacheBeanMetadata(boolean cacheBeanMetadata);

     /**
      * Return whether to cache bean metadata such as given bean definitions
      * (in merged fashion) and resolved bean classes.
      */
     boolean isCacheBeanMetadata();

     /**
      * Specify the resolution strategy for expressions in bean definition values.
      * <p>There is no expression support active in a BeanFactory by default.
      * An ApplicationContext will typically set a standard expression strategy
      * here, supporting "#{...}" expressions in a Unified EL compatible style.
      * @since 3.0
      */
     void setBeanExpressionResolver(BeanExpressionResolver resolver);

     /**
      * Return the resolution strategy for expressions in bean definition values.
      * @since 3.0
      */
     BeanExpressionResolver getBeanExpressionResolver();

     /**
      * Specify a Spring 3.0 ConversionService to use for converting
      * property values, as an alternative to JavaBeans PropertyEditors.
      * @since 3.0
      */
     void setConversionService(ConversionService conversionService);

     /**
      * Return the associated ConversionService, if any.
      * @since 3.0
      */
     ConversionService getConversionService();

     /**
      * Add a PropertyEditorRegistrar to be applied to all bean creation processes.
      * <p>Such a registrar creates new PropertyEditor instances and registers them
      * on the given registry, fresh for each bean creation attempt. This avoids
      * the need for synchronization on custom editors; hence, it is generally
      * preferable to use this method instead of {@link #registerCustomEditor}.
      * @param registrar the PropertyEditorRegistrar to register
      */
     void addPropertyEditorRegistrar(PropertyEditorRegistrar registrar);

     /**
      * Register the given custom property editor for all properties of the
      * given type. To be invoked during factory configuration.
      * <p>Note that this method will register a shared custom editor instance;
      * access to that instance will be synchronized for thread-safety. It is
      * generally preferable to use {@link #addPropertyEditorRegistrar} instead
      * of this method, to avoid for the need for synchronization on custom editors.
      * @param requiredType type of the property
      * @param propertyEditorClass the {@link PropertyEditor} class to register
      */
     void registerCustomEditor(Class<?> requiredType, Class<? extends PropertyEditor> propertyEditorClass);

     /**
      * Initialize the given PropertyEditorRegistry with the custom editors
      * that have been registered with this BeanFactory.
      * @param registry the PropertyEditorRegistry to initialize
      */
     void copyRegisteredEditorsTo(PropertyEditorRegistry registry);

     /**
      * Set a custom type converter that this BeanFactory should use for converting
      * bean property values, constructor argument values, etc.
      * <p>This will override the default PropertyEditor mechanism and hence make
      * any custom editors or custom editor registrars irrelevant.
      * @see #addPropertyEditorRegistrar
      * @see #registerCustomEditor
      * @since 2.5
      */
     void setTypeConverter(TypeConverter typeConverter);

     /**
      * Obtain a type converter as used by this BeanFactory. This may be a fresh
      * instance for each call, since TypeConverters are usually <i>not</i> thread-safe.
      * <p>If the default PropertyEditor mechanism is active, the returned
      * TypeConverter will be aware of all custom editors that have been registered.
      * @since 2.5
      */
     TypeConverter getTypeConverter();

     /**
      * Add a String resolver for embedded values such as annotation attributes.
      * @param valueResolver the String resolver to apply to embedded values
      * @since 3.0
      */
     void addEmbeddedValueResolver(StringValueResolver valueResolver);

     /**
      * Resolve the given embedded value, e.g. an annotation attribute.
      * @param value the value to resolve
      * @return the resolved value (may be the original value as-is)
      * @since 3.0
      */
     String resolveEmbeddedValue(String value);

     /**
      * Add a new BeanPostProcessor that will get applied to beans created
      * by this factory. To be invoked during factory configuration.
      * <p>Note: Post-processors submitted here will be applied in the order of
      * registration; any ordering semantics expressed through implementing the
      * {@link org.springframework.core.Ordered} interface will be ignored. Note
      * that autodetected post-processors (e.g. as beans in an ApplicationContext)
      * will always be applied after programmatically registered ones.
      * @param beanPostProcessor the post-processor to register
      */
     void addBeanPostProcessor(BeanPostProcessor beanPostProcessor);

     /**
      * Return the current number of registered BeanPostProcessors, if any.
      */
     int getBeanPostProcessorCount();

     /**
      * Register the given scope, backed by the given Scope implementation.
      * @param scopeName the scope identifier
      * @param scope the backing Scope implementation
      */
     void registerScope(String scopeName, Scope scope);

     /**
      * Return the names of all currently registered scopes.
      * <p>This will only return the names of explicitly registered scopes.
      * Built-in scopes such as "singleton" and "prototype" won't be exposed.
      * @return the array of scope names, or an empty array if none
      * @see #registerScope
      */
     String[] getRegisteredScopeNames();

     /**
      * Return the Scope implementation for the given scope name, if any.
      * <p>This will only return explicitly registered scopes.
      * Built-in scopes such as "singleton" and "prototype" won't be exposed.
      * @param scopeName the name of the scope
      * @return the registered Scope implementation, or {@code null} if none
      * @see #registerScope
      */
     Scope getRegisteredScope(String scopeName);

     /**
      * Provides a security access control context relevant to this factory.
      * @return the applicable AccessControlContext (never {@code null})
      * @since 3.0
      */
     AccessControlContext getAccessControlContext();

     /**
      * Copy all relevant configuration from the given other factory.
      * <p>Should include all standard configuration settings as well as
      * BeanPostProcessors, Scopes, and factory-specific internal settings.
      * Should not include any metadata of actual bean definitions,
      * such as BeanDefinition objects and bean name aliases.
      * @param otherFactory the other BeanFactory to copy from
      */
     void copyConfigurationFrom(ConfigurableBeanFactory otherFactory);

     /**
      * Given a bean name, create an alias. We typically use this method to
      * support names that are illegal within XML ids (used for bean names).
      * <p>Typically invoked during factory configuration, but can also be
      * used for runtime registration of aliases. Therefore, a factory
      * implementation should synchronize alias access.
      * @param beanName the canonical name of the target bean
      * @param alias the alias to be registered for the bean
      * @throws BeanDefinitionStoreException if the alias is already in use
      */
     void registerAlias(String beanName, String alias) throws BeanDefinitionStoreException;

     /**
      * Resolve all alias target names and aliases registered in this
      * factory, applying the given StringValueResolver to them.
      * <p>The value resolver may for example resolve placeholders
      * in target bean names and even in alias names.
      * @param valueResolver the StringValueResolver to apply
      * @since 2.5
      */
     void resolveAliases(StringValueResolver valueResolver);

     /**
      * Return a merged BeanDefinition for the given bean name,
      * merging a child bean definition with its parent if necessary.
      * Considers bean definitions in ancestor factories as well.
      * @param beanName the name of the bean to retrieve the merged definition for
      * @return a (potentially merged) BeanDefinition for the given bean
      * @throws NoSuchBeanDefinitionException if there is no bean definition with the given name
      * @since 2.5
      */
     BeanDefinition getMergedBeanDefinition(String beanName) throws NoSuchBeanDefinitionException;

     /**
      * Determine whether the bean with the given name is a FactoryBean.
      * @param name the name of the bean to check
      * @return whether the bean is a FactoryBean
      * ({@code false} means the bean exists but is not a FactoryBean)
      * @throws NoSuchBeanDefinitionException if there is no bean with the given name
      * @since 2.5
      */
     boolean isFactoryBean(String name) throws NoSuchBeanDefinitionException;

     /**
      * Explicitly control the current in-creation status of the specified bean.
      * For container-internal use only.
      * @param beanName the name of the bean
      * @param inCreation whether the bean is currently in creation
      * @since 3.1
      */
     void setCurrentlyInCreation(String beanName, boolean inCreation);

     /**
      * Determine whether the specified bean is currently in creation.
      * @param beanName the name of the bean
      * @return whether the bean is currently in creation
      * @since 2.5
      */
     boolean isCurrentlyInCreation(String beanName);

     /**
      * Register a dependent bean for the given bean,
      * to be destroyed before the given bean is destroyed.
      * @param beanName the name of the bean
      * @param dependentBeanName the name of the dependent bean
      * @since 2.5
      */
     void registerDependentBean(String beanName, String dependentBeanName);

     /**
      * Return the names of all beans which depend on the specified bean, if any.
      * @param beanName the name of the bean
      * @return the array of dependent bean names, or an empty array if none
      * @since 2.5
      */
     String[] getDependentBeans(String beanName);

     /**
      * Return the names of all beans that the specified bean depends on, if any.
      * @param beanName the name of the bean
      * @return the array of names of beans which the bean depends on,
      * or an empty array if none
      * @since 2.5
      */
     String[] getDependenciesForBean(String beanName);

     /**
      * Destroy the given bean instance (usually a prototype instance
      * obtained from this factory) according to its bean definition.
      * <p>Any exception that arises during destruction should be caught
      * and logged instead of propagated to the caller of this method.
      * @param beanName the name of the bean definition
      * @param beanInstance the bean instance to destroy
      */
     void destroyBean(String beanName, Object beanInstance);

     /**
      * Destroy the specified scoped bean in the current target scope, if any.
      * <p>Any exception that arises during destruction should be caught
      * and logged instead of propagated to the caller of this method.
      * @param beanName the name of the scoped bean
      */
     void destroyScopedBean(String beanName);

     /**
      * Destroy all singleton beans in this factory, including inner beans that have
      * been registered as disposable. To be called on shutdown of a factory.
      * <p>Any exception that arises during destruction should be caught
      * and logged instead of propagated to the caller of this method.
      */
     void destroySingletons();

 }

可以配置的工厂,一般可能也不会用到..而且我想一般人可能不会去修改啥配置吧..

比如我们bean的属性可以用@Value注入,我们可以再这里进行SPEL表达式的一些配置

     /**
      * 测试 ConfigurableBeanFactory
      */
     @Test
     public void testConfigurableBeanFactory() {
         DefaultListableBeanFactory autowireCapableBeanFactory = (DefaultListableBeanFactory) applicationContext.getAutowireCapableBeanFactory();

         BeanFactoryTest_Bean2 bean1 = autowireCapableBeanFactory.createBean(BeanFactoryTest_Bean2.class);
         System.out.println(bean1); // BeanFactoryTest_Bean2{value='spring.BeanFactoryTest@1ca14537'}

         //EL有缓存所以要信create1个bean
         StandardBeanExpressionResolver beanExpressionResolver = (StandardBeanExpressionResolver) autowireCapableBeanFactory.getBeanExpressionResolver();
         beanExpressionResolver.setExpressionPrefix("#(");
         beanExpressionResolver.setExpressionSuffix(")");
         BeanFactoryTest_Bean3 bean3 = autowireCapableBeanFactory.createBean(BeanFactoryTest_Bean3.class);
         System.out.println(bean3); // BeanFactoryTest_Bean3{value='spring.BeanFactoryTest@1ca14537'}
     }

     private static class BeanFactoryTest_Bean2 {
         @Value("#{@myBeanFactoryTestBean.toString()}")
         public String value;

         @Override
         public String toString() {
             return "BeanFactoryTest_Bean2{" +
                     "value='" + value + '\'' +
                     '}';
         }
     }

     private static class BeanFactoryTest_Bean3 {

         @Value("#(@myBeanFactoryTestBean.toString())")
         public String value;

         @Override
         public String toString() {
             return "BeanFactoryTest_Bean3{" +
                     "value='" + value + '\'' +
                     '}';
         }
     }

写了2个bean去做测试是因为EL表达式有缓存..解析过以后结果会被缓存..所以写了2个bean去做测试.

自己配置了个表达式的前缀是#(后缀是),默认是#{和}....一般我想没人会去修改吧....

还有就是这个接口提供了getConversionService的方法.不过我实际测试返回的是null...不知道是不是因为我是在junit里测试的原因..这样的话就不用通过Environment去获取了..不过也没差多少.

另外还可以设置BeanPostProcessor.

         System.out.println(autowireCapableBeanFactory.getBeanPostProcessorCount()); //
         autowireCapableBeanFactory.addBeanPostProcessor(new BeanPostProcessor() {
             @Override
             public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
                 System.out.println("MyBeanPostProcessor -> postProcessBeforeInitialization");
                 return bean;
             }

             @Override
             public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
                 System.out.println("MyBeanPostProcessor -> postProcessAfterInitialization");
                 return bean;
             }
         });
         System.out.println(autowireCapableBeanFactory.getBeanPostProcessorCount()); // 12
         // MyBeanPostProcessor -> postProcessBeforeInitialization
         // MyBeanPostProcessor -> postProcessAfterInitialization
         BeanFactoryTest_Bean3 bean4 = autowireCapableBeanFactory.createBean(BeanFactoryTest_Bean3.class);

ConfigurableListableBeanFactory

 /*
  * Copyright 2002-2014 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package org.springframework.beans.factory.config;

 import java.util.Iterator;

 import org.springframework.beans.BeansException;
 import org.springframework.beans.factory.ListableBeanFactory;
 import org.springframework.beans.factory.NoSuchBeanDefinitionException;

 /**
  * Configuration interface to be implemented by most listable bean factories.
  * In addition to {@link ConfigurableBeanFactory}, it provides facilities to
  * analyze and modify bean definitions, and to pre-instantiate singletons.
  *
  * <p>This subinterface of {@link org.springframework.beans.factory.BeanFactory}
  * is not meant to be used in normal application code: Stick to
  * {@link org.springframework.beans.factory.BeanFactory} or
  * {@link org.springframework.beans.factory.ListableBeanFactory} for typical
  * use cases. This interface is just meant to allow for framework-internal
  * plug'n'play even when needing access to bean factory configuration methods.
  *
  * @author Juergen Hoeller
  * @since 03.11.2003
  * @see org.springframework.context.support.AbstractApplicationContext#getBeanFactory()
  */
 public interface ConfigurableListableBeanFactory
         extends ListableBeanFactory, AutowireCapableBeanFactory, ConfigurableBeanFactory {

     /**
      * Ignore the given dependency type for autowiring:
      * for example, String. Default is none.
      * @param type the dependency type to ignore
      */
     void ignoreDependencyType(Class<?> type);

     /**
      * Ignore the given dependency interface for autowiring.
      * <p>This will typically be used by application contexts to register
      * dependencies that are resolved in other ways, like BeanFactory through
      * BeanFactoryAware or ApplicationContext through ApplicationContextAware.
      * <p>By default, only the BeanFactoryAware interface is ignored.
      * For further types to ignore, invoke this method for each type.
      * @param ifc the dependency interface to ignore
      * @see org.springframework.beans.factory.BeanFactoryAware
      * @see org.springframework.context.ApplicationContextAware
      */
     void ignoreDependencyInterface(Class<?> ifc);

     /**
      * Register a special dependency type with corresponding autowired value.
      * <p>This is intended for factory/context references that are supposed
      * to be autowirable but are not defined as beans in the factory:
      * e.g. a dependency of type ApplicationContext resolved to the
      * ApplicationContext instance that the bean is living in.
      * <p>Note: There are no such default types registered in a plain BeanFactory,
      * not even for the BeanFactory interface itself.
      * @param dependencyType the dependency type to register. This will typically
      * be a base interface such as BeanFactory, with extensions of it resolved
      * as well if declared as an autowiring dependency (e.g. ListableBeanFactory),
      * as long as the given value actually implements the extended interface.
      * @param autowiredValue the corresponding autowired value. This may also be an
      * implementation of the {@link org.springframework.beans.factory.ObjectFactory}
      * interface, which allows for lazy resolution of the actual target value.
      */
     void registerResolvableDependency(Class<?> dependencyType, Object autowiredValue);

     /**
      * Determine whether the specified bean qualifies as an autowire candidate,
      * to be injected into other beans which declare a dependency of matching type.
      * <p>This method checks ancestor factories as well.
      * @param beanName the name of the bean to check
      * @param descriptor the descriptor of the dependency to resolve
      * @return whether the bean should be considered as autowire candidate
      * @throws NoSuchBeanDefinitionException if there is no bean with the given name
      */
     boolean isAutowireCandidate(String beanName, DependencyDescriptor descriptor)
             throws NoSuchBeanDefinitionException;

     /**
      * Return the registered BeanDefinition for the specified bean, allowing access
      * to its property values and constructor argument value (which can be
      * modified during bean factory post-processing).
      * <p>A returned BeanDefinition object should not be a copy but the original
      * definition object as registered in the factory. This means that it should
      * be castable to a more specific implementation type, if necessary.
      * <p><b>NOTE:</b> This method does <i>not</i> consider ancestor factories.
      * It is only meant for accessing local bean definitions of this factory.
      * @param beanName the name of the bean
      * @return the registered BeanDefinition
      * @throws NoSuchBeanDefinitionException if there is no bean with the given name
      * defined in this factory
      */
     BeanDefinition getBeanDefinition(String beanName) throws NoSuchBeanDefinitionException;

     /**
      * Return a unified view over all bean names managed by this factory.
      * <p>Includes bean definition names as well as names of manually registered
      * singleton instances, with bean definition names consistently coming first,
      * analogous to how type/annotation specific retrieval of bean names works.
      * @return the composite iterator for the bean names view
      * @since 4.1.2
      * @see #containsBeanDefinition
      * @see #registerSingleton
      * @see #getBeanNamesForType
      * @see #getBeanNamesForAnnotation
      */
     Iterator<String> getBeanNamesIterator();

     /**
      * Freeze all bean definitions, signalling that the registered bean definitions
      * will not be modified or post-processed any further.
      * <p>This allows the factory to aggressively cache bean definition metadata.
      */
     void freezeConfiguration();

     /**
      * Return whether this factory's bean definitions are frozen,
      * i.e. are not supposed to be modified or post-processed any further.
      * @return {@code true} if the factory's configuration is considered frozen
      */
     boolean isConfigurationFrozen();

     /**
      * Ensure that all non-lazy-init singletons are instantiated, also considering
      * {@link org.springframework.beans.factory.FactoryBean FactoryBeans}.
      * Typically invoked at the end of factory setup, if desired.
      * @throws BeansException if one of the singleton beans could not be created.
      * Note: This may have left the factory with some beans already initialized!
      * Call {@link #destroySingletons()} for full cleanup in this case.
      * @see #destroySingletons()
      */
     void preInstantiateSingletons() throws BeansException;

 }

这个接口根据文档上写的.似乎也不是给外部使用的,相比较ConfigurableBeanFactory,还提供了bean definitions和pre-instantiate的能力

没有使用过,不懂具体哪些地方会用到.用到的时候再补充吧.

以上便是我对BeanFactory接口的简单认识