Spring通过工厂方法模式与简单工厂模式和默认方式实例化bean对象的3种方式-----Spring框架

超、凢脫俗 2024-03-23 20:49 7阅读 0赞

>     <?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="springBean" class="com.powernode.spring6.bean.SpringBean"/>
>     
>     
>         <bean id="starBean" class="com.powernode.spring6.bean.StarFactory" factory-method="get"/>
>     
>     
>         <bean id="gunFactory" class="com.powernode.spring6.bean.GunFactory"/>
>     
>         <bean id="Gun" factory-bean="gunFactory" factory-method="get"/>
>     </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="springBean" class="com.powernode.spring6.bean.SpringBean"/>  
>   
>   
> <bean id="starBean" class="com.powernode.spring6.bean.StarFactory" factory-method="get"/>  
>   
>   
> <bean id="gunFactory" class="com.powernode.spring6.bean.GunFactory"/>  
>   
> <bean id="Gun" factory-bean="gunFactory" factory-method="get"/>  
> </beans>

>     package com.powernode.spring6.bean;
>     
>     import org.slf4j.Logger;
>     import org.slf4j.LoggerFactory;
>     
>     public class StarFactory
>     {
>         //简单工厂模式,静态工厂方法模式
>         private static final Logger logger = LoggerFactory.getLogger(StarFactory.class);
>         public StarFactory()
>         {
>             logger.info("工厂开工");
>         }
>         {
>             logger.info("明星工厂存在了");
>         }
>         public static Star get()
>         {
>             //这个Star对象最终创建时还是我们new出来的对象
>             logger.info("造星方法");
>             return new Star();
>         }
>     }
> 
> package com.powernode.spring6.bean;  
>   
> import org.slf4j.Logger;  
> import org.slf4j.LoggerFactory;  
>   
> public class StarFactory  
> \{  
> //简单工厂模式,静态工厂方法模式  
> private static final Logger logger = LoggerFactory.getLogger(StarFactory.class);  
> public StarFactory()  
> \{  
> logger.info("工厂开工");  
> \}  
> \{  
> logger.info("明星工厂存在了");  
> \}  
> public static Star get()  
> \{  
> //这个Star对象最终创建时还是我们new出来的对象  
> logger.info("造星方法");  
> return new Star();  
> \}  
> \}

>     package com.powernode.spring6.bean;
>     
>     import org.slf4j.Logger;
>     import org.slf4j.LoggerFactory;
>     
>     public class Gun
>     {
>         private static final Logger logger = LoggerFactory.getLogger(Gun.class);
>         //工厂方法模式当中的具体产品角色
>     
>         public Gun()
>         {
>             logger.info("一把枪");
>         }
>     }
> 
> package com.powernode.spring6.bean;  
>   
> import org.slf4j.Logger;  
> import org.slf4j.LoggerFactory;  
>   
> public class Gun  
> \{  
> private static final Logger logger = LoggerFactory.getLogger(Gun.class);  
> //工厂方法模式当中的具体产品角色  
>   
> public Gun()  
> \{  
> logger.info("一把枪");  
> \}  
> \}

>     package com.powernode.spring6.bean;
>     
>     import org.slf4j.Logger;
>     import org.slf4j.LoggerFactory;
>     
>     public class GunFactory
>     {
>         private static final Logger logger = LoggerFactory.getLogger(GunFactory.class);
>         //工厂方法模式中的具体工厂角色中的方法时:实例对象
>     
>         public GunFactory()
>         {
>             logger.info("枪械工厂开工");
>         }
>     
>         public Gun get()
>         {
>             logger.info("枪械工厂造枪");
>             return new Gun();
>         }
>     }
> 
> package com.powernode.spring6.bean;  
>   
> import org.slf4j.Logger;  
> import org.slf4j.LoggerFactory;  
>   
> public class GunFactory  
> \{  
> private static final Logger logger = LoggerFactory.getLogger(GunFactory.class);  
> //工厂方法模式中的具体工厂角色中的方法时:实例对象  
>   
> public GunFactory()  
> \{  
> logger.info("枪械工厂开工");  
> \}  
>   
> public Gun get()  
> \{  
> logger.info("枪械工厂造枪");  
> return new Gun();  
> \}  
> \}

>     package com.powernode.spring6.bean;
>     
>     import org.slf4j.Logger;
>     import org.slf4j.LoggerFactory;
>     
>     public class SpringBean
>     {
>         private static final Logger logger = LoggerFactory.getLogger(SpringBean.class);
>         public SpringBean()
>         {
>             logger.info("Bean的无参构造器已经启动");
>         }
>     }
> 
> package com.powernode.spring6.bean;  
>   
> import org.slf4j.Logger;  
> import org.slf4j.LoggerFactory;  
>   
> public class SpringBean  
> \{  
> private static final Logger logger = LoggerFactory.getLogger(SpringBean.class);  
> public SpringBean()  
> \{  
> logger.info("Bean的无参构造器已经启动");  
> \}  
> \}

>     package com.powernode.spring6.bean;
>     
>     import org.slf4j.Logger;
>     import org.slf4j.LoggerFactory;
>     
>     public class Star
>     {
>         private final static Logger logger = LoggerFactory.getLogger(Star.class);
>         public Star()
>         {
>             logger.info("Star无参构造方法启动");
>         }
>     }
> 
> package com.powernode.spring6.bean;  
>   
> import org.slf4j.Logger;  
> import org.slf4j.LoggerFactory;  
>   
> public class Star  
> \{  
> private final static Logger logger = LoggerFactory.getLogger(Star.class);  
> public Star()  
> \{  
> logger.info("Star无参构造方法启动");  
> \}  
> \}

>     package com.powernode.spring6.test;
>     
>     import com.powernode.spring6.bean.Gun;
>     import com.powernode.spring6.bean.SpringBean;
>     import com.powernode.spring6.bean.Star;
>     
>     import org.springframework.context.ApplicationContext;
>     import org.springframework.context.support.ClassPathXmlApplicationContext;
>     
>     public class Test
>     {
>         @org.junit.Test
>         public void TestInstantiation()
>         {
>             ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring.xml");
>             SpringBean SpringBean = applicationContext.getBean("springBean", SpringBean.class);
>             System.out.println(SpringBean);
>             Star star = applicationContext.getBean("starBean", Star.class);
>             System.out.println(star);
>         }
>         @org.junit.Test
>         public void TestInstantiation1()
>         {
>             ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring.xml");
>             Gun gun = applicationContext.getBean("Gun", Gun.class);
>             System.out.println(gun);
>         }
>     }
> 
> package com.powernode.spring6.test;  
>   
> import com.powernode.spring6.bean.Gun;  
> import com.powernode.spring6.bean.SpringBean;  
> import com.powernode.spring6.bean.Star;  
>   
> import org.springframework.context.ApplicationContext;  
> import org.springframework.context.support.ClassPathXmlApplicationContext;  
>   
> public class Test  
> \{  
> @org.junit.Test  
> public void TestInstantiation()  
> \{  
> ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring.xml");  
> SpringBean SpringBean = applicationContext.getBean("springBean", SpringBean.class);  
> System.out.println(SpringBean);  
> Star star = applicationContext.getBean("starBean", Star.class);  
> System.out.println(star);  
> \}  
> @org.junit.Test  
> public void TestInstantiation1()  
> \{  
> ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring.xml");  
> Gun gun = applicationContext.getBean("Gun", Gun.class);  
> System.out.println(gun);  
> \}  
> \}