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()); // 11
        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