怎么使用DeBug深入源码

Posted 2022-12-14 Nothing_doit

使用DeBug深入Spring-IOC容器的创建过程

1.写出测试程序并打上断点

2.进入Debug模式

3.Debug界面认识

4.享受Debug模式，若没有源码，自行导入

IOC容器初始化的核心代码

AbstractApplicationContext
public   void   refresh()   throws   BeansException, IllegalStateException          synchronized   ( this . startupShutdownMonitor )              // Prepare this context for refreshing.             prepareRefresh();              // Tell the subclass to refresh the internal bean factory.             ConfigurableListableBeanFactory beanFactory = obtainFreshBeanFactory();              // Prepare the bean factory for use in this context.             prepareBeanFactory(beanFactory);              try                    // Allows post-processing of the bean factory in context subclasses.                 postProcessBeanFactory(beanFactory);                  // Invoke factory processors registered as beans in the context.                 invokeBeanFactoryPostProcessors(beanFactory);                  // Register bean processors that intercept bean creation.                 registerBeanPostProcessors(beanFactory);                  // Initialize message source for this context.                 initMessageSource();                  // Initialize event multicaster for this context.                 initApplicationEventMulticaster();                  // Initialize other special beans in specific context subclasses.                 onRefresh();                  // Check for listener beans and register them.                 registerListeners();                  // Instantiate all remaining (non-lazy-init) singletons.                 finishBeanFactoryInitialization(beanFactory);                  // Last step: publish corresponding event.                 finishRefresh();                           catch   (BeansException ex)                  // Destroy already created singletons to avoid dangling resources.                 destroyBeans();                  // Reset 'active' flag.                 cancelRefresh(ex);                  // Propagate exception to caller.                  throw   ex;