spring ioc容器启动流程

public class MainTest {
public static void main(String[] args) {
ApplicationContext applicationContext = new

ClassPathXmlApplicationContext(“applicationContext.xml”);

}

}

public ClassPathXmlApplicationContext(String[] configLocations, boolean refresh, @Nullable ApplicationContext parent) throws BeansException {
super(parent);
this.setConfigLocations(configLocations);
if (refresh) {

this.refresh();

    }

}

public void refresh() throws BeansException, IllegalStateException {
synchronized(this.startupShutdownMonitor) {
this.prepareRefresh();
ConfigurableListableBeanFactory beanFactory =

this.obtainFreshBeanFactory();

        this.prepareBeanFactory(beanFactory);

        try {
            this.postProcessBeanFactory(beanFactory);
            this.invokeBeanFactoryPostProcessors(beanFactory);
            this.registerBeanPostProcessors(beanFactory);
            this.initMessageSource();
            this.initApplicationEventMulticaster();
            this.onRefresh();
            this.registerListeners();
            this.finishBeanFactoryInitialization(beanFactory);
            this.finishRefresh();
        } catch (BeansException var9) {
            if (this.logger.isWarnEnabled()) {
                this.logger.warn("Exception encountered during context initialization - cancelling refresh attempt: " + var9);
            }

            this.destroyBeans();
            this.cancelRefresh(var9);
            throw var9;
        } finally {
            this.resetCommonCaches();
        }

    }
}

protected ConfigurableListableBeanFactory obtainFreshBeanFactory() {

this.refreshBeanFactory();

    return this.getBeanFactory();
}

protected final void refreshBeanFactory() throws BeansException {
if (this.hasBeanFactory()) {
this.destroyBeans();
this.closeBeanFactory();
}

    try {
        DefaultListableBeanFactory beanFactory = this.createBeanFactory();
        beanFactory.setSerializationId(this.getId());
        this.customizeBeanFactory(beanFactory);

this.loadBeanDefinitions(beanFactory);

        this.beanFactory = beanFactory;
    } catch (IOException var2) {
        throw new ApplicationContextException("I/O error parsing bean definition source for " + this.getDisplayName(), var2);
    }
}

this.loadBeanDefinitions(beanFactory); 终于找到了beanDefinition实例化的入口。。。

2021年10月8日21:35:22