XML Application Context - bhudevi0924/Spring-boot GitHub Wiki

ClassPathXmlApplicationContext: Loads xml configuration files from the classpath.

    import org.springframework.context.support.ClassPathXmlApplicationContext;

    public class Main {
        public static void main(String[] args) {
            // Load the Spring configuration file(s) from the classpath
            ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");

            // Retrieve beans from the Spring container
            Bean_name bean = context.getBean("bean_Id", Bean_name.class);

            // Use the beans
            bean.method_name();

            // Close the context when no longer needed
            context.close();
        }
    }

FileSystemXmlApplicationContext: Loads configuration files from the file system (full path / location of the file).
- Allows configuration files to be loaded from any location in the file system.
- It lacks web specific features of WebXmlApplicationContext.
  
  import org.springframework.context.support.FileSystemXmlApplicationContext;
  
  public class Main { public static void main(String[] args) { // Load the Spring configuration file(s) from the file system FileSystemXmlApplicationContext context = new FileSystemXmlApplicationContext("path/to/applicationContext.xml");
```
      // Retrieve beans from the Spring container
      Bean_name bean = context.getBean("Bean_Id", Bean_name.class);

     // Use the beans
     bean.method_name();

     // Close the context when no longer needed
     context.close();
 }
```
  }
WebXmlApplicationContext: Used within a web application context, loaded by any web server(Tomcat, Jetty etc...) that supports Java server.
- Loads XML configuration files from the WEB-INF directory in the application.
  
  import org.springframework.web.context.support.WebXmlApplicationContext;
  
  public class Main { public static void main(String[] args) { // Load the Spring configuration file(s) from the WEB-INF directory WebXmlApplicationContext context = new WebXmlApplicationContext("path/to/applicationContext.xml");
```
      // Retrieve beans from the Spring container
      bean_name bean = context.getBean("bean_Id", bean_name.class);

      // Use the beans
      bean.someMethod();

      // Close the context when no longer needed
      context.close();
  }
```
  }