?? 1.ApplicationContextAware
????? 任何期望在ApplicationContext运行的时候被通知到都可以实现该接口
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/** * 测试Spring ApplicationContextAware接口 * @author zhangwei_david * @version $Id: TestApplicationContextAware.java, v 0.1 2015年1月3日 上午11:42:19 zhangwei_david Exp $ */ @Component public class TestApplicationContextAware implements ApplicationContextAware { /** * @see org.springframework.context.ApplicationContextAware#setApplicationContext(org.springframework.context.ApplicationContext) */ public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { LoggerUtils.info("ApplicationContext runs in"); } }
??启动过程的日志如下:
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一月 03, 2015 11:46:02 上午 org.springframework.context.support.AbstractApplicationContext$BeanPostProcessorChecker postProcessAfterInitialization 信息: Bean ‘executor‘ of type [class org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 一月 03, 2015 11:46:02 上午 org.springframework.scheduling.concurrent.ExecutorConfigurationSupport initialize 信息: Initializing ExecutorService ‘scheduler‘ 一月 03, 2015 11:46:02 上午 org.springframework.context.support.AbstractApplicationContext$BeanPostProcessorChecker postProcessAfterInitialization 信息: Bean ‘scheduler‘ of type [class org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 一月 03, 2015 11:46:02 上午 org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons 信息: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@132c619: defining beans [org.springframework.aop.config.internalAutoProxyCreator,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,app,asyncDemo,testClient,testApplicationContextAware,executor,scheduler,org.springframework.context.annotation.internalAsyncAnnotationProcessor,org.springframework.context.annotation.internalScheduledAnnotationProcessor,studentBiz,beforeAdvice,org.springframework.aop.aspectj.AspectJPointcutAdvisor#0,afterAdvice,helloWord,fileCopier,mbeanExporter,assembler,messageSource,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor]; root of factory hierarchy 11:46:02.886 [main] INFO com.cathy.demo.util.LoggerUtils - ApplicationContext runs in 一月 03, 2015 11:46:02 上午 org.springframework.context.support.AbstractApplicationContext prepareRefresh 信息: Refreshing org.apache.cxf.bus.spring.BusApplicationContext@121202d: startup date [Sat Jan 03 11:46:02 CST 2015]; root of context hierarchy 一月 03, 2015 11:46:03 上午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions 信息: Loading XML bean definitions from class path resource [META-INF/cxf/cxf.xml] 一月 03, 2015 11:46:03 上午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions 信息: Loading XML bean definitions from class path resource [META-INF/cxf/cxf-extension-jaxws.xml] 一月 03, 2015 11:46:03 上午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions 信息: Loading XML bean definitions from class path resource [META-INF/cxf/cxf-extension-soap.xml] 一月 03, 2015 11:46:03 上午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
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2 BeanNameAware
?????如果Bean想知道在BeanFactory中设置的名字时可以实现该接口
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/** * 测试BeanNameAware接口 * @author zhangwei_david * @version $Id: TestBeanNameAware.java, v 0.1 2015年1月3日 上午11:48:50 zhangwei_david Exp $ */ @Component(value = "hello") public class TestBeanNameAware implements BeanNameAware { private String beanName; /** * @see org.springframework.beans.factory.BeanNameAware#setBeanName(java.lang.String) */ public void setBeanName(String name) { LoggerUtils.info("setBeanName(" + name + ")"); beanName = name; } /** * Getter method for property <tt>beanName</tt>. * * @return property value of beanName */ public String getBeanName() { return beanName; } }
?结果是:
?12:10:47.496 [main] INFO? com.cathy.demo.util.LoggerUtils - setBeanName(hello)
3. InitializingBean
????如果期望在BeanFactory?设置所有的属性后作出进一步的反应可以实现该接口
/** * 测试InitializingBean * @author zhangwei_david * @version $Id: TestInitializingBean.java, v 0.1 2015年1月3日 下午12:04:38 zhangwei_david Exp $ */ @Component() public class TestInitializingBean implements InitializingBean, BeanNameAware { private String beanName; /** * @see org.springframework.beans.factory.InitializingBean#afterPropertiesSet() */ public void afterPropertiesSet() throws Exception { LoggerUtils.info("Bean的属性都被设置完成:" + beanName); } /** * @see org.springframework.beans.factory.BeanNameAware#setBeanName(java.lang.String) */ public void setBeanName(String name) { beanName = name; } }
?结果是:
12:10:47.496 [main] INFO? com.cathy.demo.util.LoggerUtils - Bean的属性都被设置完成:testInitializingBean
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4. BeanPostProcessor
???BeanPostProcessor?是BeanFactory的钩子允许客户对新建的Bean进行修改
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/** * Test BeanPostProcessor * @author zhangwei_david * @version $Id: TestBeanPostProcessor.java, v 0.1 2015年1月3日 下午12:14:32 zhangwei_david Exp $ */ @Component public class TestBeanPostProcessor implements BeanPostProcessor { /** * @see org.springframework.beans.factory.config.BeanPostProcessor#postProcessBeforeInitialization(java.lang.Object, java.lang.String) */ public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException { LoggerUtils.info("bean初始化之前调用:bean=" + bean + ", beanName" + beanName); return bean; } /** * @see org.springframework.beans.factory.config.BeanPostProcessor#postProcessAfterInitialization(java.lang.Object, java.lang.String) */ public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException { LoggerUtils.info("bean初始化之后调用:bean=" + bean + ", beanName" + beanName); return bean; } }
?结果是:
12:16:06.314 [main] INFO? com.cathy.demo.util.LoggerUtils - ApplicationContext runs in
12:16:06.314 [main] INFO? com.cathy.demo.util.LoggerUtils - bean初始化之前调用:bean=com.cathy.demo.test.TestApplicationContextAware@f70944, beanNametestApplicationContextAware
after test for AOP?? postProcessBeforeInitialization
12:16:06.330 [main] INFO? com.cathy.demo.util.LoggerUtils - bean初始化之后调用:bean=com.cathy.demo.test.TestApplicationContextAware@f70944, beanNametestApplicationContextAware
after test for AOP?? postProcessAfterInitialization
12:16:06.330 [main] INFO? com.cathy.demo.util.LoggerUtils - setBeanName(hello)
12:16:06.330 [main] INFO? com.cathy.demo.util.LoggerUtils - bean初始化之前调用:bean=com.cathy.demo.test.TestBeanNameAware@a6bea6, beanNamehello
after test for AOP?? postProcessBeforeInitialization
12:16:06.330 [main] INFO? com.cathy.demo.util.LoggerUtils - bean初始化之后调用:bean=com.cathy.demo.test.TestBeanNameAware@a6bea6, beanNamehello
after test for AOP?? postProcessAfterInitialization
12:16:06.330 [main] INFO? com.cathy.demo.util.LoggerUtils - bean初始化之前调用:bean=com.cathy.demo.test.TestInitializingBean@1b21bd3, beanNametestInitializingBean
after test for AOP?? postProcessBeforeInitialization
12:16:06.330 [main] INFO? com.cathy.demo.util.LoggerUtils - Bean的属性都被设置完成:testInitializingBean
12:16:06.346 [main] INFO? com.cathy.demo.util.LoggerUtils - bean初始化之后调用:bean=com.cathy.demo.test.TestInitializingBean@1b21bd3, beanNametestInitializingBean
after test for AOP?? postProcessAfterInitialization
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原文:http://zhangwei-david.iteye.com/blog/2172165