Spring SpringMVC在启动完成后执行方法源码解析

package com.creatar.portal.webservice;
import org.springframework.context.ApplicationListener;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.stereotype.Component;
@Component("BeanDefineConfigue")
public class BeanDefineConfigue implements
ApplicationListener<ContextRefreshedEvent> {//ContextRefreshedEvent为初始化完毕事件，spring还有很多事件可以利用
// @Autowired
// private IRoleDao roleDao;
/**
* 当一个ApplicationContext被初始化或刷新触发
*/
@Override
public void onApplicationEvent(ContextRefreshedEvent event) {
// roleDao.getUserList();//spring容器初始化完毕加载用户列表到内存
System.out.println("spring容易初始化完毕================================================");
}
}

<bean id="beanDefineConfigue" class="com.creatar.portal.webservice.BeanDefineConfigue"></bean>

package com.creatar.portal.webservice;
import java.util.ArrayList;
import java.util.List;
import org.springframework.context.ApplicationEvent;
import org.springframework.context.ApplicationListener;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.stereotype.Component;
@Component("BeanDefineConfigue2")
public class BeanDefineConfigue2 implements ApplicationListener<ApplicationEvent> {
List<String> list = new ArrayList<String>();
/**
* 当一个ApplicationContext被初始化或刷新触发
*/
@Override
public void onApplicationEvent(ApplicationEvent event) {
if (event instanceof ContextRefreshedEvent) {
System.out.println("spring容易初始化完毕================================================888");
}
}
}

 @Override 
  public void onApplicationEvent(ContextRefreshedEvent event) { 
  if(event.getApplicationContext().getParent() == null){//root application context 没有parent，他就是老大. 
    //需要执行的逻辑代码，当spring容器初始化完成后就会执行该方法。 
  } 
  }