详解SpringIOC容器中bean的作用范围和生命周期

<!-- 默认是单例的(singleton)-->
<bean id="human" class="com.entity.Human"></bean>

<bean id="human" class="com.entity.Human" scope="singleton"></bean>

@Test
 public void test(){
  //通过ClassPathXmlApplicationContext对象加载配置文件方式将javabean对象交给spring来管理
  ApplicationContext applicationContext=new ClassPathXmlApplicationContext("bean.xml");
  //获取Spring容器中的bean对象，通过id和类字节码来获取
  Human human = applicationContext.getBean("human", Human.class);
  Human human1 = applicationContext.getBean("human", Human.class);
  System.out.println(human==human1);
 }

  <bean id="human" class="com.entity.Human" scope="prototype"></bean>

 public void init(){
  System.out.println("初始化...");
 }

 public void destroy(){
  System.out.println("销毁了...");
 }

<bean id="person" class="com.entity.Person" scope="singleton" init-method="init" destroy-method="destroy">
   
  </bean>

@Test
 public void test(){
  //通过ClassPathXmlApplicationContext对象加载配置文件方式将javabean对象交给spring来管理
  ClassPathXmlApplicationContext Context=new ClassPathXmlApplicationContext("bean.xml");
//  //获取Spring容器中的bean对象，通过id和类字节码来获取
  Person person = Context.getBean("person", Person.class);
  //销毁容器
  Context.close();
 }

@Test
 public void test(){
  //通过ClassPathXmlApplicationContext对象加载配置文件方式将javabean对象交给spring来管理
  ClassPathXmlApplicationContext Context=new ClassPathXmlApplicationContext("bean.xml");
//  //获取Spring容器中的bean对象，通过id和类字节码来获取
  Person person = Context.getBean("person", Person.class);
  //销毁容器
  Context.close();
 }