编辑“︁Spring Bean生命周期”︁（章节）

== 代码示例 ==

=== 完整生命周期示例 ===
<syntaxhighlight lang="java">
public class LifecycleDemo implements BeanNameAware, BeanFactoryAware, 
        ApplicationContextAware, InitializingBean, DisposableBean {
    
    private String dependency;

    // 1. 构造器
    public LifecycleDemo() {
        System.out.println("1. 构造器调用");
    }

    // 2. 属性注入
    public void setDependency(String dependency) {
        this.dependency = dependency;
        System.out.println("2. 依赖注入: " + dependency);
    }

    // 3. BeanNameAware
    @Override
    public void setBeanName(String name) {
        System.out.println("3. BeanNameAware: " + name);
    }

    // 4. BeanFactoryAware
    @Override
    public void setBeanFactory(BeanFactory beanFactory) {
        System.out.println("4. BeanFactoryAware");
    }

    // 5. ApplicationContextAware
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) {
        System.out.println("5. ApplicationContextAware");
    }

    // 6. @PostConstruct
    @PostConstruct
    public void postConstruct() {
        System.out.println("6. @PostConstruct");
    }

    // 7. InitializingBean
    @Override
    public void afterPropertiesSet() {
        System.out.println("7. InitializingBean.afterPropertiesSet()");
    }

    // 8. 自定义init
    public void customInit() {
        System.out.println("8. 自定义init-method");
    }

    // 9. @PreDestroy
    @PreDestroy
    public void preDestroy() {
        System.out.println("9. @PreDestroy");
    }

    // 10. DisposableBean
    @Override
    public void destroy() {
        System.out.println("10. DisposableBean.destroy()");
    }

    // 11. 自定义destroy
    public void customDestroy() {
        System.out.println("11. 自定义destroy-method");
    }
}
</syntaxhighlight>

=== 配置示例 ===
<syntaxhighlight lang="xml">
<!-- XML配置方式 -->
<bean id="lifecycleDemo" class="com.example.LifecycleDemo"
      init-method="customInit" destroy-method="customDestroy">
    <property name="dependency" value="示例依赖"/>
</bean>
</syntaxhighlight>

<syntaxhighlight lang="java">
// Java配置方式
@Configuration
public class AppConfig {
    @Bean(initMethod = "customInit", destroyMethod = "customDestroy")
    public LifecycleDemo lifecycleDemo() {
        LifecycleDemo demo = new LifecycleDemo();
        demo.setDependency("示例依赖");
        return demo;
    }
}
</syntaxhighlight>