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                1. spring先檢查注解注入的bean,并將它們實例化 2. 然后spring初始化bean的順序是按照xml中配置的順序依次執行構造 3. 如果某個類實現了ApplicationContextAware接口,會在類初始化完成后調用setApplicationContext()方法進行操作 4. 如果某個類實現了InitializingBean接口,會在類初始化完成后,并在setApplicationContext()方法執行完畢后,調用afterPropertiesSet()方法進行操作 **注解使用回顧** 1. 在spring中,用注解來向Spring容器注冊Bean。需要在applicationContext.xml中注冊`<context:component-scan base-package=”pagkage1[,pagkage2,…,pagkageN]”/>`。 2. 如果某個類的頭上帶有特定的注解`@Component/@Repository/@Service/@Controller`,就會將這個對象作為Bean注冊進Spring容器 3. 在使用spring管理的bean時,無需在對調用的對象進行new的過程,只需使用@Autowired將需要的bean注入本類即可
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