How many ways we can create IoC container in spring?

What are different ways to achieve Spring IoC?

Spring Framework provides three ways to configure beans to be used in the application.

  • Annotation Based Configuration – By using @Service or @Component annotations. …
  • XML Based Configuration – By creating Spring Configuration XML file to configure the beans.

How would we instantiate a Spring IoC container?

Instantiating Spring IoC Container using BeanFactory

  1. In our StudentLogic class we will Read the Configuration file(SpringConfig.xml) through Resource class.
  2. Bean Factory will take the resource as input to get all the bean instances.
  3. Get the Student Class instance by calling the getBean() method over the bean factory.

How many ways we can create object in Spring?

There are three different ways in which you can define a Spring bean:

  1. annotating your class with the stereotype @Component annotation (or its derivatives)
  2. writing a bean factory method annotated with the @Bean annotation in a custom Java configuration class.
  3. declaring a bean definition in an XML configuration file.

How many ways a Spring bean can be configured?

There are 3 different ways to configure a class as Spring Bean. XML Configuration is the most popular configuration. The bean element tag is used in xml context file to configure a Spring Bean. Using Java Based Configuration, you can configure a Spring bean using @Bean annotation.

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What is IoC Container?

IoC Container (a.k.a. DI Container) is a framework for implementing automatic dependency injection. … The IoC container creates an object of the specified class and also injects all the dependency objects through a constructor, a property or a method at run time and disposes it at the appropriate time.

What are the different types of IoC containers in Spring?

There are basically two types of IOC Containers in Spring:

  • BeanFactory: BeanFactory is like a factory class that contains a collection of beans. It instantiates the bean whenever asked for by clients.
  • ApplicationContext: The ApplicationContext interface is built on top of the BeanFactory interface.

Can we have multiple spring container?

Now, I can say: 1) yes, there are two instance of ApplicationContext ( each instance will include a instance of beanFactory) 2) the instance of the mvc layer is child and keep a reference of the parent instance. 3) beans in parent instance can be used by child, but beans in child cannot be used by parent.

Does Autowire create new instance?

When you autowire a prototype bean, Spring will initialize a new instance of the bean. If you autowire the bean in multiple places, then Spring will create a new instance for every place you autowire the bean.

What is BeanFactory and ApplicationContext in spring?

Overview. The Spring Framework comes with two IOC containers – BeanFactory and ApplicationContext. The BeanFactory is the most basic version of IOC containers, and the ApplicationContext extends the features of BeanFactory.