public class Student implements BeanFactoryAware, BeanNameAware,
InitializingBean, DisposableBean,ApplicationContextAware {
private String name;
public Student(String name) {
this.name = name;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
System.out.println("BeanFactoryAware......");
}
@Override
public void setBeanName(String s) {
System.out.println("BeanNameAware......");
}
@Override
public void destroy() throws Exception {
System.out.println("DisposableBean......");
}
@Override
public void afterPropertiesSet() throws Exception {
System.out.println("InitializingBean......");
}
@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
System.out.println("ApplicationContextAware......");
}
}
public class MyBeanFactoryPostProcessor implements BeanFactoryPostProcessor {
public MyBeanFactoryPostProcessor() {
super();
System.out.println("这是BeanFactoryPostProcessor实现类构造器！！");
}
@Override
public void postProcessBeanFactory(ConfigurableListableBeanFactory arg0)
throws BeansException {
System.out.println("BeanFactoryPostProcessor调用postProcessBeanFactory方法");
BeanDefinition bd = arg0.getBeanDefinition("student");
MutablePropertyValues propertyValues = bd.getPropertyValues();
//配置文件中的信息在加载到Spring中后以BeanDefinition的形式存在.在这里又可以更改BeanDefinition,所以可以理解为更改配置文件里面的内容
// propertyValues.add("zdy","123");
}
}
public class MyBeanPostProcessor implements BeanPostProcessor {
public MyBeanPostProcessor() {
super();
System.out.println("这是BeanPostProcessor实现类构造器！！");
}
@Override
public Object postProcessAfterInitialization(Object arg0, String arg1)
throws BeansException {
System.out.println("BeanPostProcessor接口方法After对属性进行更改！");
return arg0;
}
@Override
public Object postProcessBeforeInitialization(Object arg0, String arg1)
throws BeansException {
System.out.println("BeanPostProcessor接口方法Before对属性进行更改！");
return arg0;
}
}
public class MyInstantiationAwareBeanPostProcessor extends
InstantiationAwareBeanPostProcessorAdapter {
public MyInstantiationAwareBeanPostProcessor() {
super();
System.out.println("这是InstantiationAwareBeanPostProcessorAdapter实现类构造器！！");
}
// 接口方法、实例化Bean之前调用
@Override
public Object postProcessBeforeInstantiation(Class beanClass,
String beanName) throws BeansException {
System.out.println("InstantiationAwareBeanPostProcessor调用Before方法");
return null;
}
// 接口方法、实例化Bean之后调用
@Override
public Object postProcessAfterInitialization(Object bean, String beanName)
throws BeansException {
System.out.println("InstantiationAwareBeanPostProcessor调用Ater方法");
return bean;
}
// 接口方法、设置某个属性时调用
@Override
public PropertyValues postProcessPropertyValues(PropertyValues pvs,
PropertyDescriptor[] pds, Object bean, String beanName)
throws BeansException {
System.out.println("InstantiationAwareBeanPostProcessor调用postProcessPropertyValues方法");
return pvs;
}
}
public class App
{
public static void main( String[] args )
{
ApplicationContext ac =new ClassPathXmlApplicationContext("applicationContext.xml");
Student stu = (Student) ac.getBean("student");
stu.setName("wangwu");
}
}
<?xml version="1.0" encoding="UTF-8"?>
<beans
<bean id="student" class="com.zdy.Student">
<constructor-arg value="zhangsan"/>
</bean>
<bean id="myBeanFactoryPostProcessor" class="com.zdy.MyBeanFactoryPostProcessor"></bean>
<bean id="myInstantiationAwareBeanPostProcessor" class="com.zdy.MyInstantiationAwareBeanPostProcessor"></bean>
<bean id="myBeanPostProcessor" class="com.zdy.MyBeanPostProcessor"></bean>
</beans>
这是BeanFactoryPostProcessor实现类构造器！！ BeanFactoryPostProcessor调用postProcessBeanFactory方法 这是InstantiationAwareBeanPostProcessorAdapter实现类构造器！！ 这是BeanPostProcessor实现类构造器！！ InstantiationAwareBeanPostProcessor调用Before方法 InstantiationAwareBeanPostProcessor调用postProcessPropertyValues方法 BeanNameAware...... BeanFactoryAware...... ApplicationContextAware...... BeanPostProcessor接口方法Before对属性进行更改！ InitializingBean...... InstantiationAwareBeanPostProcessor调用Ater方法 BeanPostProcessor接口方法After对属性进行更改！