public class BookDao implements com.zinksl.dao.BookDao {
    public void say() {
        System.out.println("BookDao say hello!");
    }
//    添加初始化方法
    public void  init(){
        System.out.println("这里是初始化方法！");
    }
    public void destroy(){
        System.out.println("这里是销毁前方法");
    }
//    添加销毁方法
}

public class BookService implements com.zinksl.service.BookService, InitializingBean, DisposableBean {
private BookDao bookDao ;
    public void setBookDao(BookDao bookDao) {
        this.bookDao = bookDao;
    }
    public void say() {
        bookDao.say();
        System.out.println("BookService say hello!");
    }
    public void destroy() throws Exception {
        System.out.println("这里是BookService销毁前方法");
    }
    public void afterPropertiesSet() throws Exception {
        System.out.println("这里是BookService初始化方法");
    }
}