Spring配置文件中bean标签中init-method和destroy-method和用注解方式配置

Person类:

public class Person {  
    private int i = 0;  
  
    public Person(){  
        System.out.println("实例化一个对象");  
    }  
      
    public void init(){  
        System.out.println("调用初始化方法....");  
    }  
      
    public void destory222(){  
        System.out.println("调用销毁化方法....");  
    }  
}  

applicationContext.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"  
        xsi:schemaLocation="http://www.springframework.org/schema/beans   
                            http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">  
    <!-- 配置初始化方法和销毁方法,但是如果要销毁方法生效scope="singleton" -->                  
    <bean id="person" class="com.xxc.initAndDestory.domain.Person" scope="singleton" lazy-init="false" init-method="init" destroy-method="destory"></bean>  
</beans>  

测试类:

public class Test {  
    public static void main(String[] args) {  
        //如果要调用销毁方法必须用子类来声明,而不是ApplicationContext,因为ApplicationContext没有close()  
        ClassPathXmlApplicationContext ac = new ClassPathXmlApplicationContext("com/xxc/initAndDestory/applicationContext.xml");  
        Person p1 = (Person)ac.getBean("person");  
        Person p2 = (Person)ac.getBean("person");  
        ac.close();  
    }  
}  

 如果用注解方式配置: 

applicationContext.xml:

 

<?xml version="1.0" encoding="UTF-8"?>  
<beans xmlns="http://www.springframework.org/schema/beans"  
       xmlns:context="http://www.springframework.org/schema/context"   
       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-2.5.xsd    
                            http://www.springframework.org/schema/context     
                            http://www.springframework.org/schema/context/spring-context-2.5.xsd">    
                              
    <context:annotation-config/>   
                              
    <!-- scope默认是 prototype:getBean()一次创建一个实例-->  
    <bean id="person" class="com.xxc.initAndDestory.domain.Person"></bean>  
</beans>  

 

Person类:

public class Person {  
    private int i = 0;  
  
    public Person(){  
        System.out.println("实例化一个对象");  
    }  
    @PostConstruct //初始化方法的注解方式  等同与init-method=init  
    public void init(){  
        System.out.println("调用初始化方法....");  
    }  
    @PreDestroy //销毁方法的注解方式  等同于destory-method=destory222  
    public void destory(){  
        System.out.println("调用销毁化方法....");  
    }  
}  

 

posted @ 2018-09-21 16:58  会偷袭的猫  阅读(1518)  评论(0编辑  收藏  举报