Spring Bean 生命周期示意图:
了解Spring的生命周期非常重要，我们可以利用Spring机制来定制Bean的实例化过程。
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spring-service.xml:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd">
<!-- 定义一个bean -->
<bean id="narCodeService" class="com.test.service.impl.NarCodeServiceImpl">
</bean>
<bean id="beanLifecycle" class="com.test.spring.BeanLifecycle" init-method="init">
<property name="name" value="张三"></property>
<property name="sex" value="男"></property>
</bean>
</beans>
Service Class:
package com.test.spring;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanClassLoaderAware;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.BeanFactoryAware;
import org.springframework.beans.factory.BeanNameAware;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.context.ApplicationEventPublisherAware;
import org.springframework.context.EnvironmentAware;
import org.springframework.context.ResourceLoaderAware;
import org.springframework.context.annotation.ImportAware;
import org.springframework.core.env.Environment;
import org.springframework.core.io.ResourceLoader;
import org.springframework.core.type.AnnotationMetadata;
import com.sun.org.apache.xml.internal.security.Init;
/**
* 测试Spring Bean的生命周期
* @author zss
*
*/
public class BeanLifecycle implements InitializingBean,DisposableBean
,BeanFactoryAware,BeanNameAware,BeanPostProcessor{
private String name;
private String sex;
public String getName() {
return name;
}
public void setName(String name) {
System.out.println("》》》调用BeanLifecycle对象"+this.getName()+"属性set方法，设值为:"+name);
this.name = name;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
System.out.println("》》》调用BeanLifecycle对象"+this.getSex()+"属性set方法，设值为:"+sex);
this.sex = sex;
}
public void init (){
System.out.println("》》》init方法被调用");
}
public void close() {
System.out.println("》》》close方法被调用");
}
@Override
public void afterPropertiesSet() throws Exception {
System.out.println(this);
System.out.println("》》》BeanLifecycle调用了InitailizingBean的afterPorpertiesSet方法了.....");
}
@Override
public void destroy() throws Exception {
System.out.println("》》》BeanLifecycle从Spring IoC容器中移除了.......");
}
// @Override
// public void setApplicationContext(ApplicationContext paramApplicationContext)
// throws BeansException {
// System.out.print("》》》调用ApplicationContextAware接口setApplicationContext方法:");
// System.out.println(paramApplicationContext);
//
// }
// @Override
// public void setResourceLoader(ResourceLoader paramResourceLoader) {
// System.out.print("》》》调用ResourceLoaderAware接口setResourceLoader方法:");
// System.out.println(paramResourceLoader);
// }
// @Override
// public void setImportMetadata(AnnotationMetadata paramAnnotationMetadata) {
// System.out.println(333333);
// }
// @Override
// public void setEnvironment(Environment paramEnvironment) {
// System.out.print("》》》调用EnvironmentAware接口setEnvironment方法:");
// System.out.println(paramEnvironment);
// }
@Override
public void setBeanName(String paramString) {
System.out.println("》》》调用BeanNameAware接口setBenaName方法: "+paramString);
}
@Override
public void setBeanFactory(BeanFactory paramBeanFactory)
throws BeansException {
System.out.print("》》》调用BeanFactoryAware接口setBeanFactory方法:");
System.out.println(paramBeanFactory);
}
// @Override
// public void setBeanClassLoader(ClassLoader paramClassLoader) {
// System.out.print("》》》调用BeanClassLoaderAware接口setBeanClassLoader方法:");
// System.out.println(paramClassLoader);
// }
// @Override
// public void setApplicationEventPublisher(
// ApplicationEventPublisher paramApplicationEventPublisher) {
// System.out.print("》》》调用ApplicationEventPublisherAware接口setApplicationEventPublisher方法:");
// System.out.println(paramApplicationEventPublisher);
// }
@Override
public String toString() {
return "BeanLifecycle [name=" + name + ", sex=" + sex + "]";
}
@Override
public Object postProcessAfterInitialization(Object arg0, String arg1)
throws BeansException {
System.out.println("调用了postProcessAfterInitialization方法");
return null;
}
@Override
public Object postProcessBeforeInitialization(Object arg0, String arg1)
throws BeansException {
System.out.println("调用了postProcessBeforeInitialization方法");
return null;
}
}
Test:
package com.test.spring;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class T {
ClassPathXmlApplicationContext applicationcontext=null;
@Before
public void before() {
System.out.println("》》》Spring ApplicationContext容器开始初始化了......");
applicationcontext= new ClassPathXmlApplicationContext(new String[]{"test1-service.xml"});
System.out.println("》》》Spring ApplicationContext容器初始化完毕了......");
}
@Test
public void test() {
BeanLifecycle beanLifecycle =applicationcontext.getBean("beanLifecycle",BeanLifecycle.class);
//applicationcontext.close();
applicationcontext.registerShutdownHook();
}
}
测试结果：
》》》Spring ApplicationContext容器开始初始化了...... 2017-03-18 20:29:20 INFO:ClassPathXmlApplicationContext-Refreshing org[email protected]6c7e6b26: startup date [Sat Mar 18 20:29:20 CST 2017]; root of context hierarchy 2017-03-18 20:29:20 INFO:XmlBeanDefinitionReader-Loading XML bean definitions from class path resource [test1-service.xml] 》》》调用BeanLifecycle对象null属性set方法，设值为:周四上 》》》调用BeanLifecycle对象null属性set方法，设值为:男 》》》调用BeanNameAware接口setBenaName方法: beanLifecycle 》》》调用BeanFactoryAware接口setBeanFactory方法:org.s[email protected]2b763bac: defining beans [narCodeService,beanLifecycle]; root of factory hierarchy BeanLifecycle [name=张三, sex=男] 》》》BeanLifecycle调用了InitailizingBean的afterPorpertiesSet方法了..... 》》》init方法被调用 调用了postProcessBeforeInitialization方法 》》》Spring ApplicationContext容器初始化完毕了...... 2017-03-18 20:29:20 INFO:ClassPathXmlApplicationContext-Closing org[email protected]6c7e6b26: startup date [Sat Mar 18 20:29:20 CST 2017]; root of context hierarchy 》》》BeanLifecycle从Spring IoC容器中移除了....... 》》》close方法被调用
时间： 2024-12-12 09:16:36