Spring之InitializingBean接口和DisposableBean接口介绍

public interface InitializingBean {
  /**
   * Invoked by the containing {@code BeanFactory} after it has set all bean properties
   * and satisfied {@link BeanFactoryAware}, {@code ApplicationContextAware} etc.
   * <p>This method allows the bean instance to perform validation of its overall
   * configuration and final initialization when all bean properties have been set.
   * @throws Exception in the event of misconfiguration (such as failure to set an
   * essential property) or if initialization fails for any other reason
   */
  void afterPropertiesSet() throws Exception;
}

public interface DisposableBean {
  /**
   * Invoked by the containing {@code BeanFactory} on destruction of a bean.
   * @throws Exception in case of shutdown errors. Exceptions will get logged
   * but not rethrown to allow other beans to release their resources as well.
   */
  void destroy() throws Exception;
}

/**
 * 实现InitializingBean和DisposableBean接口
 * @author dengp
 *
 */
public class User implements InitializingBean,DisposableBean{
  private int id;
  private String name;
  private String beanName;
  public User(){
    System.out.println("User 被实例化");
  }
  public int getId() {
    return id;
  }
  public void setId(int id) {
    this.id = id;
  }
  public String getName() {
    return name;
  }
  public void setName(String name) {
    System.out.println("设置："+name);
    this.name = name;
  }
  public String getBeanName() {
    return beanName;
  }
  public void setBeanName(String beanName) {
    this.beanName = beanName;
  }
  @Override
  public String toString() {
    return "User [id=" + id + ", name=" + name + ", beanName=" + beanName + "]";
  }
  @Override
  public void destroy() throws Exception {
    // TODO Auto-generated method stub
    System.out.println("destory ....");
  }
  @Override
  public void afterPropertiesSet() throws Exception {
    System.out.println("afterPropertiesSet....");
  }
}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.springframework.org/schema/beans 
 http://www.springframework.org/schema/beans/spring-beans.xsd">
  <bean class="com.dpb.pojo.User" id="user" >
    <property name="name" value="波波烤鸭"></property>
  </bean>
</beans>

@Test
public void test1() {
  ClassPathXmlApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
  User user = ac.getBean(User.class);
  System.out.println(user);
  ac.registerShutdownHook();
}

User 被实例化
设置：波波烤鸭
afterPropertiesSet....
User [id=0, name=波波烤鸭, beanName=null]
destory ....