【Spring源碼分析】三、Bean的加載

一、切入點

  bf = new XmlBeanFactory(new ClassPathResource("bean.xml"));
  User user = bf.getBean("user", User.class);
  user = bf.getBean("user", User.class);

User.java

public class User implements BeanFactoryAware, BeanNameAware,
        InitializingBean, DisposableBean {

    private Long id;

    private String name;

    private BeanFactory beanFactory;

    private String beanName;

    public User() {
        System.out.println("【構造器】調用User的構造器實例化");
    }

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        System.out.println("【注入屬性】注入屬性name");
        this.name = name;
    }

    @Override
    public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
        this.beanFactory = beanFactory;
    }

    @Override
    public void setBeanName(String name) {
        this.beanName = name;
    }

    @Override
    public void destroy() throws Exception {
        System.out.println("【DiposibleBean接口】調用DiposibleBean.destory()");
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        System.out.println("【InitializingBean接口】調用InitializingBean.afterPropertiesSet()");
    }

    // 通過<bean>的init-method屬性指定的初始化方法
    public void myInit() {
        System.out.println("【init-method】調用<bean>的init-method屬性指定的初始化方法");
    }

    // 通過<bean>的destroy-method屬性指定的初始化方法
    public void myDestory() {
        System.out.println("【destroy-method】調用<bean>的destroy-method屬性指定的初始化方法");
    }
}

bean.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:p="http://www.springframework.org/schema/p"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd">

    <bean id="beanPostProcessor" class="com.gupao.container.MyBeanPostProcessor">
    </bean>

    <bean id="instantiationAwareBeanPostProcessor" class="com.gupao.container.MyInstantiationAwareBeanPostProcessor">
    </bean>

    <bean id="beanFactoryPostProcessor" class="com.gupao.container.MyBeanFactoryPostProcessor">
    </bean>

    <bean id="user" class="com.gupao.domain.User" init-method="myInit"
          destroy-method="myDestory" p:name="張三" lazy-init="false"/>

</beans>

待補充