Spring的注解开发-作用范围等注解的使用

package com.example.DAO.Impl;
 
import com.example.DAO.UserDAO;
import org.springframework.context.annotation.Lazy;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;
 
import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
 
@Component("userDAO")// 设置bean对象的名称
@Scope("singleton")
@Lazy(value = false)
 
public class UserDAOImpl implements UserDAO {
    public UserDAOImpl() {
        System.out.println("userDAO创建......");
    }
 
    @PostConstruct
    public void init() {
        System.out.println("userDAo初始化方法");
    }
 
    @PreDestroy
    public void destroy() {
        System.out.println("userDAo销毁方法");
    }
}