```java initialize(sources); private void initialize(Object[] sources) { //保存主配置類 if (sources != null && sources.length > 0) { this.sources.addAll(Arrays.asList(sources)); } //判斷當前是否一個web應用 this.webEnvironment = deduceWebEnvironment(); //從類路徑下找到META-INF/spring.factories配置的所有ApplicationContextInitializer；然后保存起來 setInitializers((Collection) getSpringFactoriesInstances( ApplicationContextInitializer.class)); //從類路徑下找到ETA-INF/spring.factories配置的所有ApplicationListener setListeners((Collection) getSpringFactoriesInstances(ApplicationListener.class)); //從多個配置類中找到有main方法的主配置類 this.mainApplicationClass = deduceMainApplicationClass(); } ```