spring bean初始化顺序（不包括BeanFactory的创建/属性注入准备）
Constructor（构造函数） > @PostConstruct > InitializingBean > init-method
代码验证如下。主要注意的是@PostConstruct执行的InitDestroyAnnotationBeanPostProcessor的postProcessBeforeInitialization
/**
* @Author: shidonghua
* @Description:
* @Date: 10/16/20 11:38
* @Version: 1.0
* https://programmer.help/blogs/after-properties-set-and-init-method-postconstruct-of-spring-initializing-bean.html
* postConstruct 对应的是BeanPostProcessor的postProcessBeforeInitialization
* 执行顺序是：Constructor > @PostConstruct > InitializingBean > init-method -> preDestroy -> destroy -> destroy-method
*/
public class InitSequenceBean implements InitializingBean, DisposableBean {
public InitSequenceBean() {
System.out.println("InitSequenceBean: constructor");
}
@PostConstruct
public void postConstruct() {
System.out.println("InitSequenceBean: postConstruct");
}
@PreDestroy
public void preDestory() {
System.out.println("InitSequenceBean: preDestroy");
}
public void initMethod() {
System.out.println("InitSequenceBean: init-method");
}
public void destroyMethod() {
System.out.println("InitSequenceBean: destroy-method");
}
@Override
public void afterPropertiesSet() throws Exception {
System.out.println("InitSequenceBean: afterPropertiesSet");
}
@Override
public void destroy() throws Exception {
System.out.println("InitSequenceBean: destroy");
}
}
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
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
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<bean class="com.stone.studio.springdemo.lifecycle.InitSequenceBean" init-method="initMethod"
destroy-method="destroyMethod"/>
</beans>