“application-context” in spring means nothing but it is core component of spring container in spring framework. Ideally we can say “application-context” one of the Spring Container in Spring Framework and other container is “bean-factory”. The configuration for “application-context” is loaded by the one of concrete implementation of ApplicationContext interface.
The ApplicationContext is the central interface within a Spring Application for providing configuration information to the application. It is read-only at run time , but can be reloaded if necessary and supported by the application.
Major Responsibilities of “application-context” container
- It provides bean factory methods for accessing application components.
- It provides the ability to load file resources in a generic fashion.
- It provides the ability to publish event to register listeners
- It provide the ability to resolve to support internationalization.
Creating one “application-context“
- AnnotationConfigApplicationContext. Loads a Spring application context from one or moro Java-Based configuration classes.
ApplicationContext context = new AnnotationConfigApplicationContext(JavaConfig.class;
- AnnotationConfigWebApplicationContext. Loads a Spring web application context from one or more Java-Based configuration classes.
ApplicationContext context = new AnnotationConfigWebApplicationContext(JavaWebConfig.class;
- ClassPathXMLApplicationContext. Loads a context definition from one or more XML files located in the classpath
ApplicationContext context = new ClassPathXMLApplicationContext("spingConfig.xml");
- FileSystemXMLApplicationContext. Loads a context definition from one or more XML files located in the filesystem.
ApplicationContext context = new FileSystemXMLApplicationContext("c:/spingConfig.xml");
- XMLWebApplicationContext. Loads a context definition from one or more XML files contained in the web application.
ApplicationContext context = new XMLWebApplicationContext("/WEB-INF/config/spingConfig.xml");
Accessing Application Context in the other classes:
You could also access the “application-context” container into other classes. You can implement ApplicationContextAware as in the following example:
public class AnotherClass implements ApplicationContextAware { private ApplicationContext applicationContext; @Override public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { this.applicationContext = applicationContext; } }
- Spring MVC Web Tutorial
- Spring MVC Interview Questions
- MVC Design Pattern
- Spring MVC DispatcherServlet
- Spring MVC WebApplicationContext and Root Application Context
- Spring MVC @Controller Annotation
- Spring MVC @RequestMapping Annotation
- Spring MVC @RequestParam Annotation
- Spring MVC ContextLoaderListener
- Spring MVC @RequestParam and @PathVariable annotations
- Spring MVC Hello World Example
- Spring MVC Exception Handling Example
- Spring MVC with Hibernate CRUD Example
- Spring MVC Tiles Plugin with Example
- Spring MVC Interceptor with example
- Spring MVC with MongoDB CRUD Example
- Spring MVC Internationalization & Localization with Example