What is ClassPathXmlApplicationContext?

What is ClassPathXmlApplicationContext?

The ClassPathXmlApplicationContext is a class that implements the org. springframework. context. ApplicationContext interface. In this quick tutorial, we’ll learn how to work with ClassPathXmlApplicationContext.

What is the purpose of the ApplicationContext?

ApplicationContext is a corner stone of a Spring Boot application. It represents the Spring IoC container and is responsible for instantiating, configuring, and assembling the beans. The container gets its instructions on what objects to instantiate, configure, and assemble by reading configuration metadata.

What is difference between BeanFactory and ApplicationContext?

While the BeanFactory provides basic functionality for managing and manipulating beans, often in a programmatic way, the ApplicationContext provides extra functionality like MessageSource, Access to resources, Event propagation to beans, Loading of multiple (hierarchical) contexts etc.

What is XML bean factory?

The most commonly used BeanFactory implementation is the XmlBeanFactory class. This container reads the configuration metadata from an XML file and uses it to create a fully configured system or application.

What is use of @ComponentScan?

The @ComponentScan annotation is used with the @Configuration annotation to tell Spring the packages to scan for annotated components. @ComponentScan also used to specify base packages and base package classes using thebasePackageClasses or basePackages attributes of @ComponentScan.

What Bean scopes does Spring support?

From the spring specs, there are five types of bean scopes supported :

  • singleton(default*) Scopes a single bean definition to a single object instance per Spring IoC container.
  • prototype. Scopes a single bean definition to any number of object instances.
  • request.
  • session.
  • global session.

Why do we need spring boot?

Spring Boot helps developers create applications that just run. Specifically, it lets you create standalone applications that run on their own, without relying on an external web server, by embedding a web server such as Tomcat or Netty into your app during the initialization process.

Which statements are true about ApplicationContext?

Which statements are true about WebApplicationContext? The WebApplicationContext is bound in the ServletContext, and by using static methods on the RequestContextUtils class. We can get WebApplicationContext reference by using ApplicationContext .

What is the difference between ApplicationContext and WebApplicationContext in Spring MVC?

ApplicationContext is used to create standalone applications. WebApplicationContext is used to create web applications.

What is @autowired used for?

The @Autowired annotation provides more fine-grained control over where and how autowiring should be accomplished. The @Autowired annotation can be used to autowire bean on the setter method just like @Required annotation, constructor, a property or methods with arbitrary names and/or multiple arguments.

What does bean factory do?

The BeanFactory is the actual container which instantiates, configures, and manages a number of beans. These beans typically collaborate with one another, and thus have dependencies between themselves.

What is the use of @SpringBootApplication?

Spring Boot @SpringBootApplication annotation is used to mark a configuration class that declares one or more @Bean methods and also triggers auto-configuration and component scanning. It’s same as declaring a class with @Configuration, @EnableAutoConfiguration and @ComponentScan annotations.

What is difference between @component and ComponentScan?

@Component and @ComponentScan are for different purposes. @Component indicates that a class might be a candidate for creating a bean. It’s like putting a hand up. @ComponentScan is searching packages for Components.

How many bean scopes are there?

five scopes
The spring framework provides five scopes for a bean. We can use three of them only in the context of web-aware Spring ApplicationContext and the rest of the two is available for both IoC container and Spring-MVC container.

What is the difference between Spring boot and Spring?

Spring is an open-source lightweight framework widely used to develop enterprise applications. Spring Boot is built on top of the conventional spring framework, widely used to develop REST APIs.

What is difference between spring and Spring Boot?

Is Spring Boot a backend?

Spring Boot is a backend framework that has become a major player in the enterprise Java ecosystem. It lets Java developers start building web applications quickly, without fuss.

What are the common implementations of the ApplicationContext?

ApplicationContext Implementation Classes

  • AnnotationConfigApplicationContext container.
  • AnnotationConfigWebApplicationContext.
  • XmlWebApplicationContext.

What are the responsibilities of XmlBeanFactory included?

This implementation allows you to express the objects that compose your application, and the doubtless rich interdependencies between such objects, in terms of XML. The XmlBeanFactory takes this XML configuration metadata and uses it to create a fully configured system or application.

What is the difference between ApplicationContext and BeanFactory in Spring framework?

The ApplicationContext comes with advanced features, including several that are geared towards enterprise applications, while the BeanFactory comes with only basic features. Therefore, it’s generally recommended to use the ApplicationContext, and we should use BeanFactory only when memory consumption is critical.