ApplicationContext体系：
ConfigurableApplicationContext接口中定义了一些基本操作，比如设置上下文ID，设置父应用上下文，添加监听器和刷新容器相关的操作等。
源码如下：
public interface ConfigurableApplicationContext extends ApplicationContext, Lifecycle, Closeable { String CONFIG_LOCATION_DELIMITERS = ",; \t\n"; String CONVERSION_SERVICE_BEAN_NAME = "conversionService"; String LOAD_TIME_WEAVER_BEAN_NAME = "loadTimeWeaver"; String ENVIRONMENT_BEAN_NAME = "environment"; String SYSTEM_PROPERTIES_BEAN_NAME = "systemProperties"; String SYSTEM_ENVIRONMENT_BEAN_NAME = "systemEnvironment"; //设置上下文ID void setId(String id); //设置父ApplicationContext void setParent(ApplicationContext parent); @Override ConfigurableEnvironment getEnvironment(); void setEnvironment(ConfigurableEnvironment environment); void addBeanFactoryPostProcessor(BeanFactoryPostProcessor beanFactoryPostProcessor); //添加监听器 void addApplicationListener(ApplicationListener<?> listener); //在子类中实现创建容器 void refresh() throws BeansException, IllegalStateException; void registerShutdownHook(); @Override void close(); boolean isActive(); //获取Bean工厂 ConfigurableListableBeanFactory getBeanFactory() throws IllegalStateException; }