What is the difference between the scope of Spring Bean?

bean scope

Scope can be used to specify the scope of the bean

           -singleton The default value. When the IOC container is created, it will create an instance of the bean, and it is a singleton, and the same one is obtained every time

           -prototype Prototype. When the IOC container is created, the bean is no longer instantiated, and the bean is instantiated every time the getBean method is called

           -request instantiates a bean per request

           -session share a bean in a session

 

//创建IOC容器对象
ApplicationContext ioc=new ClassPathXmlApplicationContext("beans.xml");

@Test
void testBook(){
	Book book=(Book)ioc.getBean("book");
}

<bean id="book" class="com.diko.spring.beans.Book" scope="singleton">
	<property name="id" value="8"></property>
</bean>