ApplicationContextAware
当一个类实现了这个接口（ApplicationContextAware）之后，这个类就可以方便获得ApplicationContext中的所有bean。换句话说，就是这个类可以直接获取spring配置文件中，所有有引用到的bean对象。
如果读过源码，就会发现BeanFactory中其实保存了Spring Bean容器中的属性，但是BeanFactory是一个接口且不对外暴露，真正暴露的其实是ApplicationContext，应为ApplicationContext中有一个getAutowireCapableBeanFactory方法，返回AutowireCapableBeanFactory接口，而AutowireCapableBeanFactory接口继承了BeanFactory接口。
@ServicepublicclassExcelOutYardManagerimplementsApplicationContextAware{Map<String,IExcelOutYard>excelOutYardMap;privateMap<String,IExcelOutYard>getExcelOutYard(){if(excelOutYardMap==null){excelOutYardMap=newHashMap<String,IExcelOutYard>();}returnexcelOutYardMap;}publicIExcelOutYardgetImpleService(StringmessageType){returnexcelOutYardMap.get(messageType);}@OverridepublicvoidsetApplicationContext(ApplicationContextapplicationContext)throwsBeansException{Map<String,IExcelOutYard>beansOfType=applicationContext.getBeansOfType(IExcelOutYard.class);this.getExcelOutYard();for(IExcelOutYardiExcelOutYard:beansOfType.values()){excelOutYardMap.put(iExcelOutYard.messageType(),iExcelOutYard);}}}InitializingBean接口
InitializingBean接口为bean提供了初始化方法的方式，只包括afterPropertiesSet方法，凡是继承该接口的类，在初始化bean的时候会执行该方法。一般用这个接口在Spring初始化bean之后做一些初始化操作。
这个特性比较多的运用在应用启动的时候设定自动执行的方法，比如应用启动时，从数据库查询出数据，放入对象
@ServicepublicclassEdiInitializingServiceimplementsInitializingBean{@OverridepublicvoidafterPropertiesSet()throwsException{-----BeanPostProcessor接口
在Spring容器中完成bean实例化、配置以及其它初始化方法前后要添加一些特殊的处理逻辑。需要定义一个或多个BeanPostProcessor接口实现类，然后注册到SpringIOC容器中。
下面这个例子就是根据自定义注解拦截要注入的接口实现类，运用java反射和代理的知识点来进行有效的实现类注入。
publicinterfaceHelloService{publicvoidsayHello();}@ServicepublicclassHelloServiceImpl1implementsHelloService{@OverridepublicvoidsayHello(){System.out.println("你好我是HelloServiceImpl1");}}@ServicepublicclassHelloServiceImpl2implementsHelloService{@OverridepublicvoidsayHello(){System.out.println("你好我是HelloServiceImpl2");}}@Target({ElementType.FIELD})@Retention(RetentionPolicy.RUNTIME)@Documented@Componentpublic@interfaceRountingInjected{Stringvalue()default"helloServiceImpl1";}@ComponentpublicclassHelloServiceInjectProcessorimplementsBeanPostProcessor{@AutowiredprivateApplicationContextapplicationContext;@OverridepublicObjectpostProcessBeforeInitialization(Objectbean,StringbeanName)throwsBeansException{returnbean;}@OverridepublicObjectpostProcessAfterInitialization(Objectbean,StringbeanName)throwsBeansException{Class<?>targetCls=bean.getClass();Field[]targetFld=targetCls.getDeclaredFields();for(Fieldfield:targetFld){//找到制定目标的注解类if(field.isAnnotationPresent(RountingInjected.class)){if(!field.getType().isInterface()){thrownewBeanCreationException("RoutingInjectedfieldmustbedeclaredasaninterface:"+field.getName()+"@Class"+targetCls.getName());}try{this.handleRoutingInjected(field,bean,field.getType());}catch(IllegalAccessExceptione){e.printStackTrace();}}}returnbean;}/***@paramfield*@parambean*@paramtype*@throwsIllegalAccessException*/privatevoidhandleRoutingInjected(Fieldfield,Objectbean,Classtype)throwsIllegalAccessException{Map<String,Object>candidates=this.applicationContext.getBeansOfType(type);field.setAccessible(true);if(candidates.size()==1){field.set(bean,candidates.values().iterator().next());}elseif(candidates.size()==2){StringinjectVal=field.getAnnotation(RountingInjected.class).value();Objectproxy=RoutingBeanProxyFactory.createProxy(injectVal,type,candidates);field.set(bean,proxy);}else{thrownewIllegalArgumentException("Findmorethan2beansfortype:"+type);}}}publicclassRoutingBeanProxyFactory{privatefinalstaticStringDEFAULT_BEAN_NAME="helloServiceImpl1";publicstaticObjectcreateProxy(Stringname,Classtype,Map<String,Object>candidates){ProxyFactoryproxyFactory=newProxyFactory();proxyFactory.setInterfaces(type);proxyFactory.addAdvice(newVersionRoutingMethodInterceptor(name,candidates));returnproxyFactory.getProxy();}staticclassVersionRoutingMethodInterceptorimplementsMethodInterceptor{privateObjecttargetObject;publicVersionRoutingMethodInterceptor(Stringname,Map<String,Object>beans){this.targetObject=beans.get(name);if(this.targetObject==null){this.targetObject=beans.get(DEFAULT_BEAN_NAME);}}@OverridepublicObjectinvoke(MethodInvocationinvocation)throwsThrowable{returninvocation.getMethod().invoke(this.targetObject,invocation.getArguments());}}}@ComponentpublicclassHelloServiceTest{@RountingInjected(value="helloServiceImpl2")privateHelloServicehelloService;publicvoidtestSayHello(){helloService.sayHello();}publicstaticvoidmain(String[]args){AnnotationConfigApplicationContextapplicationContext=newAnnotationConfigApplicationContext("colin.spring.basic.advanced.bbp");HelloServiceTesthelloServiceTest=applicationContext.getBean(HelloServiceTest.class);helloServiceTest.testSayHello();}}DisposableBean接口
Spring bean被销毁时调用，这个使用较少，但也是生命周期的一部分
Spring生命周期图
结语
如果和spring生命周期图对照，那么可以看到，每一个接口的实现就是spring生命周期的一部分，这些接口实际上也体现了Spring框架的灵活性，理解这些接口对spring框架的使用有极大的帮助。