### Spring自定義Bean的創建與銷毀 1. 注解方式 在 bean 初始化時會經歷幾個階段，首先可以使用注解 @PostConstruct, @PreDestroy 來在 bean 的創建和銷毀階段進行調用: ``` @Component public class AnnotationBean { private final static Logger LOGGER =LoggerFactory.getLogger(AnnotationBean.class); @PostConstruct public void start(){ LOGGER.info("AnnotationBean start"); } @PreDestroy public void destroy(){ LOGGER.info("AnnotationBean destroy"); } } ``` 2. 實現InitializingBean, DisposableBean接口 ``` @Service public class SpringLifeCycleService implements InitializingBean,DisposableBean{ private final static Logger LOGGER = LoggerFactory.getLogger(SpringLifeCycleService.class); @Override public void afterPropertiesSet() throws Exception { LOGGER.info("SpringLifeCycleService start"); } @Override public void destroy() throws Exception { LOGGER.info("SpringLifeCycleService destroy"); } } ``` 3. JAVA Config方式 ``` @Configuration public class LifeCycleConfig { @Bean(initMethod = "start", destroyMethod = "destroy") public SpringLifeCycle create(){ SpringLifeCycle springLifeCycle = new SpringLifeCycle() ; return springLifeCycle ; } } public class SpringLifeCycle{ private final static Logger LOGGER = LoggerFactory.getLogger(SpringLifeCycle.class); public void start(){ LOGGER.info("SpringLifeCycle start"); } public void destroy(){ LOGGER.info("SpringLifeCycle destroy"); } } ``` 4. XML配置方式 ``` <bean class="com.crossoverjie.spring.SpringLifeCycle" init-method="start" destroy-method="destroy"> </bean> ```