Spring ApplicationContext Container Example

By | June 13, 2021

The Spring IOC container

Spring IOC container is mainly responsible for instantiating, configuring, and assembling the Spring beans. The Spring container gets instructions on what are objects to instantiate, configure, and assemble by reading configurational metadata. The configurational metadata is represented in XML config file or Java annotations

Spring framework provides the following two types of containers.

  1. BeanFactory container
  2. ApplicationContext container

In this post, we post let’s have a look into the Spring ApplicationContext container using a demo Project.

Spring ApplicationContext Container:

ApplicationContext provides advanced features to our spring applications that make them enterprise-level applications, like i18n, event publishing, JNDI access, EJB integration, Hibernate, etc.

Implementations of ApplicationContext:

  • ClassPathXmlApplicationContext− It mainly loads bean definitions from XML files located in the project classpath

 ApplicationContext ctx =  new ClassPathXmlApplicationContext(“ApplicationContext.xml”);

  • FileSystemXmlApplicationContext−  It loads bean definitions from XML files in the file system.

ApplicationContext ctx = new FileSystemXmlApplicationContext(“classpath:ApplicationContext.xml”);

  • WebXmlApplicationContext− XmlWebApplicationContext is used to represent Spring Container for web applications. By default, Spring creates an object of XmlWebApplicationContext class to represent the application context/spring container for web applications.

pom.xml

Message.java

applicationContext.xml

Client Programs: 

ClientTest.java

 ClientTest2.java

If you run  ClientTest.java &  ClientTest2.java as Java Application then it will give the below output: 

101 Welcome to Spring Framework!!

That’s all about Spring ApplicationContext Container Example

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