Spring中Bean的五步生命周期详解-----Spring框架

野性酷女 2024-03-23 20:54 10阅读 0赞

>     package com.powernode.spring6.bean;
>     
>     import org.slf4j.Logger;
>     import org.slf4j.LoggerFactory;
>     
>     public class User
>     {
>         private static final Logger logger = LoggerFactory.getLogger(User.class);
>         private String name;
>         public User()
>         {
>             logger.info("User的无参数构造方法,1");
>         }
>         //第一步实例化Bean,给Bean属性赋值(通过set方法)
>         //初始化Bean(调用Bean的init方法,需要自己写自己配),使用Bean,销毁Bean(调用destroy方法,需要自己写自己配)
>         public void setName(String name)
>         {
>             this.name = name;
>             logger.info("给属性赋值,2");
>         }
>         public void initBean()
>         {
>             //需要自己写,自己配
>             logger.info("初始化Bean,3");
>         }
>         public void destroyBean()
>         {
>             //需要自己写,自己配
>             logger.info("销毁Bean,5");
>         }
>     }
> 
> package com.powernode.spring6.bean;  
>   
> import org.slf4j.Logger;  
> import org.slf4j.LoggerFactory;  
>   
> public class User  
> \{  
> private static final Logger logger = LoggerFactory.getLogger(User.class);  
> private String name;  
> public User()  
> \{  
> logger.info("User的无参数构造方法,1");  
> \}  
> //第一步实例化Bean,给Bean属性赋值(通过set方法)  
> //初始化Bean(调用Bean的init方法,需要自己写自己配),使用Bean,销毁Bean(调用destroy方法,需要自己写自己配)  
> public void setName(String name)  
> \{  
> this.name = name;  
> logger.info("给属性赋值,2");  
> \}  
> public void initBean()  
> \{  
> //需要自己写,自己配  
> logger.info("初始化Bean,3");  
> \}  
> public void destroyBean()  
> \{  
> //需要自己写,自己配  
> logger.info("销毁Bean,5");  
> \}  
> \}

>     <?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 id="user" class="com.powernode.spring6.bean.User" init-method="initBean" destroy-method="destroyBean">
>             <property name="name" value="Jack"/>
>         </bean>
>     </beans>
> 
> <?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 id="user" class="com.powernode.spring6.bean.User" init-method="initBean" destroy-method="destroyBean">  
> <property name="name" value="Jack"/>  
> </bean>  
> </beans>

>     package com.powernode.spring6.test;
>     
>     import com.powernode.spring6.bean.User;
>     import org.slf4j.Logger;
>     import org.slf4j.LoggerFactory;
>     import org.springframework.context.ApplicationContext;
>     import org.springframework.context.support.ClassPathXmlApplicationContext;
>     
>     public class Test
>     {
>         private static final Logger logger = LoggerFactory.getLogger(Test.class);
>         @org.junit.Test
>         public void TestLifeCycleFive()
>         {
>             ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring.xml");
>             User user = applicationContext.getBean("user",User.class);
>             logger.info("使用Bean,4");
>             ClassPathXmlApplicationContext context = (ClassPathXmlApplicationContext) applicationContext;
>             context.close();
>         }
>     }
> 
> package com.powernode.spring6.test;  
>   
> import com.powernode.spring6.bean.User;  
> import org.slf4j.Logger;  
> import org.slf4j.LoggerFactory;  
> import org.springframework.context.ApplicationContext;  
> import org.springframework.context.support.ClassPathXmlApplicationContext;  
>   
> public class Test  
> \{  
> private static final Logger logger = LoggerFactory.getLogger(Test.class);  
> @org.junit.Test  
> public void TestLifeCycleFive()  
> \{  
> ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring.xml");  
> User user = applicationContext.getBean("user",User.class);  
> logger.info("使用Bean,4");  
> ClassPathXmlApplicationContext context = (ClassPathXmlApplicationContext) applicationContext;  
> context.close();  
> \}  
> \}