protected void doLoadBeanDefinitions(InputStream inputStream) throws Exception {
        Document doc = XmlUtil.readXML(inputStream);
        Element root = doc.getDocumentElement();
        NodeList childNodes = root.getChildNodes();
        for (int i = 0; i < childNodes.getLength(); i++) {
            ....
            String initMethod = bean.getAttribute("init-method");
            String destroyMethod = bean.getAttribute("destroy-method");
            Class<?> clazz = Class.forName(calssName);
            String beanName = StrUtil.isNotEmpty(id) ? id : name;
            if (StrUtil.isEmpty(beanName)){
                beanName = StrUtil.lowerFirst(clazz.getSimpleName());
            }
            // 定義bean
            BeanDefinition beanDefinition = new BeanDefinition(clazz);
            // 設(shè)置初始化、摧毀方法
            beanDefinition.setInitMethodName(initMethod);
            beanDefinition.setDestoryMethodName(destroyMethod);
            ....
        }
    }

public interface InitializingBean {
    void afterPropertiesSet() throws Exception;
}
public interface DisposableBean {
    void destroy() throws Exception;
}

@Override
    protected Object createBean(String beanName, BeanDefinition beanDefinition, Object[] args) {
        Object bean = null;
        try {
            bean = createBeanInstance(beanDefinition, beanName, args);
            // 注入屬性
            applyPropertyValues(beanName, bean, beanDefinition);
            // 提供給外部的擴(kuò)展包裝，執(zhí)行 Bean 的初始化方法和 BeanPostProcessor 的前置和后置處理方法
            bean = initializeBean(beanName, bean, beanDefinition);
        } catch (Exception e) {
            throw new RuntimeException("bean create error!", e);
        }
        // 注冊(cè)實(shí)現(xiàn)了 DisposableBean 接口的 Bean 對(duì)象
        registerDisposableBeanIfNecessary(beanName, bean, beanDefinition);
        registerSingleton(beanName, bean);
        return bean;
    }
private Object initializeBean(String beanName, Object bean, BeanDefinition beanDefinition) throws BeansException {
        // 1. 執(zhí)行 BeanPostProcess before 操作
        Object wrappedBean = applyBeanPostProcessorsBeforeInitialization(bean, beanName);
        try {
            // 執(zhí)行bean初始化方法
            invokeInitMethods(beanName,wrappedBean,beanDefinition);
        }catch (Exception e){
            throw new BeansException("Invocation of init method of bean[" + beanName + "] failed", e);
        }
        // 2. 執(zhí)行 BeanPostProcess after 操作
        wrappedBean = applyBeanPostProcessorsAfterInitialization(bean,beanName);
        return wrappedBean;
    }
private void invokeInitMethods(String beanName, Object bean, BeanDefinition beanDefinition) throws Exception {
    // 如果是通過(guò)接口實(shí)現(xiàn)，直接使用接口提供的方法    
    if (bean instanceof InitializingBean) {
            ((InitializingBean) bean).afterPropertiesSet();
        }
    // 通過(guò)xml配置，獲取方法執(zhí)行
        String initMethodName = beanDefinition.getInitMethodName();
        if (StrUtil.isNotEmpty(initMethodName)) {
            Method method = beanDefinition.getBeanClass().getMethod(initMethodName);
            // getMethod 已經(jīng)做了非空判斷
            if (null == method) {
                throw new BeansException("Could not find an init method named '" + initMethodName + "' on bean with name '" + beanName + "'");
            }
            method.invoke(bean);
        }
    }

/**
 * bean 摧毀適配器
 * @author huangle
 * @date 2023/3/7 10:26
 */
public class DisposableBeanAdapter implements DisposableBean {
    /**
     * bean名字
     */
    private final String beanName;
    /**
     * bean
     */
    private final Object bean;
    /**
     * 銷(xiāo)毀方法名稱(chēng)
     */
    private String destroyMethodName;
    public DisposableBeanAdapter(String beanName, Object bean, BeanDefinition beanDefinition) {
        this.beanName = beanName;
        this.bean = bean;
        this.destroyMethodName = beanDefinition.getDestoryMethodName();
    }
    @Override
    public void destroy() throws Exception {
        // 1. 實(shí)現(xiàn) DisposableBean 接口，完成摧毀擴(kuò)展
        if (bean instanceof DisposableBean) {
            ((DisposableBean) bean).destroy();
        }
        // 2. 通過(guò)xml配置 配置 destroy 方法 實(shí)現(xiàn)
        if (StrUtil.isNotEmpty(destroyMethodName) && !(bean instanceof DisposableBean && "destory".equals(destroyMethodName))) {
            Method destroyMethod = bean.getClass().getMethod(destroyMethodName);
            if (null == destroyMethod) {
                throw new BeansException("Couldn't find a destroy method named '" + destroyMethodName + "' on bean with name '" + beanName + "'");
            }
            destroyMethod.invoke(bean);
        }
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<beans>
    <bean id="userDao" class="cn.anoxia.springframework.beans.factory.support.UserDao" init-method="initMethod" destroy-method="destroyMethod"/>
    <bean id="userService" class="cn.anoxia.springframework.beans.factory.support.UserService">
        <property name="name" value="Anoxia"/>
        <property name="nickname" value="迪迦"/>
        <property name="userDao" ref="userDao"/>
    </bean>
<!--    <bean id="myBeanPostProcecssor" class="cn.anoxia.springframework.beans.factory.support.MyBeanPostProcecssor"/>-->
<!--    <bean id="myFactoryPostProcessor" class="cn.anoxia.springframework.beans.factory.support.MyBeanFactoryPostProcessor"/>-->
</beans>
public class UserService implements InitializingBean, DisposableBean{
    @Override
    public void destroy() throws Exception {
        System.out.println("userService執(zhí)行：destroy 方法");
    }
    @Override
    public void afterPropertiesSet() throws Exception {
        System.out.println("userService執(zhí)行：init 方法");
    }
}