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
/**
* 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：
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
2 BeanNameAware
如果Bean想知道在BeanFactory中设置的名字时可以实现该接口
/**
* 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
在Spring中有两种方式在Bean的全部属性都设置成功后执行特定的行为，除了实现InitializingBean接口外还可以在Spring的配置文件中指定init-method属性。那么如果这两者同时存在执行的属性又该是什么样的呢？
/**
* 测试InitializingBean接口的特点
*
* @author zhangwei_david
* @version $Id: MyInitTest.java, v 0.1 2015年6月7日 下午5:46:27 zhangwei_david Exp $
*/
public class MyInitTest implements InitializingBean {
public MyInitTest() {
System.out.println("------------MyInitTest 构造方法被调用-------------");
}
public void init() {
System.out.println("------------spring 配置的initMethod 被调用-------------");
}
/**
* @see org.springframework.beans.factory.InitializingBean#afterPropertiesSet()
*/
public void afterPropertiesSet() throws Exception {
System.out.println("------------InitializingBean.afterPropertiesSet ()方法被调用-------------");
}
}
<bean id="myInitTest" class="com.cathy.demo.spring.MyInitTest"
init-method="init" />
2015-06-07 17:56:47 [ main:0 ] - [ INFO ] @TestExecutionListeners is not present for class [class com.cathy.demo.spring.MySpringTest]: using defaults. 2015-06-07 17:56:47 [ main:145 ] - [ INFO ] Loading XML bean definitions from URL [file:/H:/Alipay.com/workspace4alipay/demo/target/classes/META-INF/spring/test-beans.xml] 2015-06-07 17:56:47 [ main:327 ] - [ INFO ] JSR-250 'javax.annotation.ManagedBean' found and supported for component scanning 2015-06-07 17:56:47 [ main:359 ] - [ INFO ] Refreshing org.springframework.context.support.GenericApplicationContext@15f7ae5: startup date [Sun Jun 07 17:56:47 CST 2015]; root of context hierarchy 2015-06-07 17:56:47 [ main:472 ] - [ INFO ] Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@2db087: 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,myInitTest,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor]; root of factory hierarchy ------------MyInitTest 构造方法被调用------------- ------------InitializingBean.afterPropertiesSet ()方法被调用------------- ------------spring 配置的initMethod 被调用------------- 2015-06-07 17:56:47 [ Thread-0:493 ] - [ INFO ] Closing org.springframework.context.support.GenericApplicationContext@15f7ae5: startup date [Sun Jun 07 17:56:47 CST 2015]; root of context hierarchy 2015-06-07 17:56:47 [ Thread-0:494 ] - [ INFO ] Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@2db087: 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,myInitTest,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor]; root of factory hierarchy 我们从日志可以可以发现，它们的执行顺序是， afterPropertiesSet()->initMethod()
在使用注解的方式指定initMehthod的方式是在initMethod（）上添加 @PostConstruct 此时的执行顺序是否还是这样呢？我们看看下面的测试，Spring的配置文件中不在有bean的配置
/**
* 测试InitializingBean接口的特点
*
* @author zhangwei_david
* @version $Id: MyInitTest.java, v 0.1 2015年6月7日 下午5:46:27 zhangwei_david Exp $
*/
@Component
public class MyInitTest implements InitializingBean {
public MyInitTest() {
System.out.println("------------MyInitTest 构造方法被调用-------------");
}
@PostConstruct
public void init() {
System.out.println("------------spring 配置的initMethod 被调用-------------");
}
/**
* @see org.springframework.beans.factory.InitializingBean#afterPropertiesSet()
*/
public void afterPropertiesSet() throws Exception {
System.out.println("------------InitializingBean.afterPropertiesSet ()方法被调用-------------");
}
}
结果是：
2015-06-07 18:09:44 [ main:0 ] - [ INFO ] @TestExecutionListeners is not present for class [class com.cathy.demo.spring.MySpringTest]: using defaults. 2015-06-07 18:09:44 [ main:136 ] - [ INFO ] Loading XML bean definitions from URL [file:/H:/Alipay.com/workspace4alipay/demo/target/classes/META-INF/spring/test-beans.xml] 2015-06-07 18:09:44 [ main:311 ] - [ INFO ] JSR-250 'javax.annotation.ManagedBean' found and supported for component scanning 2015-06-07 18:09:44 [ main:346 ] - [ INFO ] Refreshing org.springframework.context.support.GenericApplicationContext@15f7ae5: startup date [Sun Jun 07 18:09:44 CST 2015]; root of context hierarchy 2015-06-07 18:09:44 [ main:480 ] - [ INFO ] Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@1fe3806: 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,myInitTest,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor]; root of factory hierarchy ------------MyInitTest 构造方法被调用------------- ------------spring 配置的initMethod 被调用------------- ------------InitializingBean.afterPropertiesSet ()方法被调用------------- 2015-06-07 18:09:44 [ Thread-0:500 ] - [ INFO ] Closing org.springframework.context.support.GenericApplicationContext@15f7ae5: startup date [Sun Jun 07 18:09:44 CST 2015]; root of context hierarchy 2015-06-07 18:09:44 [ Thread-0:501 ] - [ INFO ] Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@1fe3806: 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,myInitTest,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor]; root of factory hierarchy
4. BeanPostProcessor
BeanPostProcessor 是BeanFactory的钩子允许客户对新建的Bean进行修改
/**
* 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：
2:16:06.314 [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
/**
* 测试InitializingBean接口的特点
* 测试BeanPostProcessor接口
*
* @author zhangwei_david
* @version $Id: MyInitTest.java, v 0.1 2015年6月7日 下午5:46:27 zhangwei_david Exp $
*/
@Component
public class MyInitTest implements InitializingBean, BeanPostProcessor {
private Person man;
public MyInitTest() {
System.out.println("------------MyInitTest 构造方法被调用-------------");
}
@PostConstruct
public void init() {
System.out.println("------------spring 配置的initMethod 被调用-------------");
}
/**
* @see org.springframework.beans.factory.InitializingBean#afterPropertiesSet()
*/
public void afterPropertiesSet() throws Exception {
System.out.println("------------InitializingBean.afterPropertiesSet ()方法被调用-------------");
}
/**
* @see org.springframework.beans.factory.config.BeanPostProcessor#postProcessBeforeInitialization(java.lang.Object, java.lang.String)
*/
public Object postProcessBeforeInitialization(Object bean, String beanName)
throws BeansException {
System.out.println("---------在" + beanName
+ "初始化之前调用 postProccessBeforeInitializaiton--------");
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 {
System.out.println("---------在" + beanName
+ "初始化之后 调用 postProcessAfterInitialization--------");
return bean;
}
/**
* Setter method for property <tt>man</tt>.
*
* @param man value to be assigned to property man
*/
@Autowired
public void setMan(Person man) {
System.out.println(" 设置属性 man=" + man.getSex());
this.man = man;
}
}
------------MyInitTest 构造方法被调用------------- 2015-06-07 18:49:55 [ main:480 ] - [ INFO ] Bean 'man' of type [class com.cathy.demo.spring.Man] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 设置属性 man=Male ------------spring 配置的initMethod 被调用------------- ------------InitializingBean.afterPropertiesSet ()方法被调用------------- 2015-06-07 18:49:55 [ main:492 ] - [ INFO ] Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@de0926: 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,myInitTest,man,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor]; root of factory hierarchy ---------在com.cathy.demo.spring.MySpringTest初始化之前调用 postProccessBeforeInitializaiton-------- ---------在com.cathy.demo.spring.MySpringTest初始化之后 调用 postProcessAfterInitialization-------- 2015-06-07 18:49:55 [ Thread-0:506 ] - [ INFO ] Closing org.springframework.context.support.GenericApplicationContext@115b42e: startup date [Sun Jun 07 18:49:55 CST 2015]; root of context hierarchy 2015-06-07 18:49:55 [ Thread-0:507 ] - [ INFO ] Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@de0926: 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,myInitTest,man,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor]; root of factory hierarchy