Spring自定义Bean创建与销毁方式的总结

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本文总结了Spring中自定义Bean的创建与销毁的四种方式：1)使用注解`@PostConstruct`, `@PreDestroy`；2)实现InitializingBean, DisposableBean接口；3)借助JAVA Config配置；4)通过XML配置文件进行控制。" 127707933,10944874,深度学习基础：线性拟合与神经网络解析,"['深度学习', '机器学习', '神经网络', '线性模型', '傅里叶分析']

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1.注解方式

在 bean 初始化时会经历几个阶段，首先可以使用注解 @PostConstruct, @PreDestroy 来在 bean 的创建和销毁阶段进行调用:

@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.实现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>