Spring如何将自己new出来的对象交给Spring容器管理-----Spring框架

深碍√TFBOYSˉ_ 2024-03-23 21:23 37阅读 0赞

>     package com.powernode.spring6.test;
>     
>     import com.powernode.spring6.bean.Student;
>     import com.powernode.spring6.bean.User;
>     import org.springframework.beans.factory.support.DefaultListableBeanFactory;
>     import org.springframework.context.ApplicationContext;
>     import org.springframework.context.support.ClassPathXmlApplicationContext;
>     
>     public class Test
>     {
>         //Spring容器只对SingleTon的Bean进行完整生命周期的管理
>         //如果是protoType作用域的Bean,Spring容器只负责初始化完该Bean,一旦客户端获取该Bean后,Spring容器就不再管理该对象的生命周期了
>         @org.junit.Test
>         public void TestBeanInitiation()
>         {
>             ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring.xml");
>             User user = applicationContext.getBean("user",User.class);
>             System.out.println(user);
>             ClassPathXmlApplicationContext classPathXmlApplicationContext = (ClassPathXmlApplicationContext) applicationContext;
>             classPathXmlApplicationContext.close();
>         }
>         @org.junit.Test
>         public void RegisterBean()
>         {
>             //自己new对象
>             Student student = new Student();
>             System.out.println(student);
>             //将自己new出来的对象交给Spring管理
>             DefaultListableBeanFactory factory = new DefaultListableBeanFactory();
>             factory.registerSingleton("student",student);
>             //从Spring容器获取
>             student = factory.getBean("student",Student.class);
>             System.out.println(student);
>             //输出的内存地址是一样的
>         }
>     }
> 
>     package com.powernode.spring6.test;
>     
>     import com.powernode.spring6.bean.Student;
>     import com.powernode.spring6.bean.User;
>     import org.springframework.beans.factory.support.DefaultListableBeanFactory;
>     import org.springframework.context.ApplicationContext;
>     import org.springframework.context.support.ClassPathXmlApplicationContext;
>     
>     public class Test
>     {
>         //Spring容器只对SingleTon的Bean进行完整生命周期的管理
>         //如果是protoType作用域的Bean,Spring容器只负责初始化完该Bean,一旦客户端获取该Bean后,Spring容器就不再管理该对象的生命周期了
>         @org.junit.Test
>         public void TestBeanInitiation()
>         {
>             ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring.xml");
>             User user = applicationContext.getBean("user",User.class);
>             System.out.println(user);
>             ClassPathXmlApplicationContext classPathXmlApplicationContext = (ClassPathXmlApplicationContext) applicationContext;
>             classPathXmlApplicationContext.close();
>         }
>         @org.junit.Test
>         public void RegisterBean()
>         {
>             //自己new对象
>             Student student = new Student();
>             System.out.println(student);
>             //将自己new出来的对象交给Spring管理
>             DefaultListableBeanFactory factory = new DefaultListableBeanFactory();
>             factory.registerSingleton("student",student);
>             //从Spring容器获取
>             student = factory.getBean("student",Student.class);
>             System.out.println(student);
>             //输出的内存地址是一样的
>         }
>     }