//表示bean初始化對應的操作
    public void init(){
        System.out.println("init...");
    }
    //表示bean銷毀前對應的操作
    public void destory(){
        System.out.println("destory...");
    }

 <!--init-method：設置bean初始化生命周期回調函數(shù)-->
    <!--destroy-method：設置bean銷毀生命周期回調函數(shù)，僅適用于單例對象-->
    <bean id="bookDao" class="com.itheima.dao.impl.BookDaoImpl" init-method="init" destroy-method="destory"/>

import com.itheima.dao.BookDao;
import org.springframework.context.support.ClassPathXmlApplicationContext;
 
public class AppForLifeCycle {
    public static void main( String[] args ) {
        ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
 
        BookDao bookDao = (BookDao) ctx.getBean("bookDao");
        bookDao.save();
 
        //關閉容器
        ctx.close();
    }
}

//注冊關閉鉤子函數(shù)，在虛擬機退出之前回調此函數(shù)，關閉容器
        ctx.registerShutdownHook();

    <bean id="bookService" class="com.itheima.service.impl.BookServiceImpl">
        <property name="bookDao" ref="bookDao"/>
    </bean>

import com.itheima.dao.BookDao;
import com.itheima.service.BookService;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.InitializingBean;
 
public class BookServiceImpl implements BookService, InitializingBean, DisposableBean {
    private BookDao bookDao;
 
    public void setBookDao(BookDao bookDao) {
        System.out.println("set .....");
        this.bookDao = bookDao;
    }
 
    public void save() {
        System.out.println("book service save ...");
        bookDao.save();
    }
 
    public void destroy() throws Exception {
        System.out.println("service destroy");
    }
 
    public void afterPropertiesSet() throws Exception {
        System.out.println("service init");
    }
}