listener-Listener +servletcontext+applicationcontext

Resources

What's the difference between ServletContext and ApplicationContext?

ServletContext: is a web container of things, a webapp, more than the scope of the session, from which you can get a lot of information, such as the path directory of the project deployment ,

initialization parameters of the project, you can also setattribute into the same usage as the session, but notice the scope

Role:

applicationcontext: Spring is something that spring is reading from this XML configuration file to the new Bean's

(Apply context Relationship)

Role: (1) Read Bean configuration file, manage bean load, instantiate, maintain dependency between beans, responsible for bean's periodic declaration

(2) Provide complete framework functions such as: A. Internationalization Support B. Resource access: Resource rs = ctx. GetResource ("Classpath:config.properties"),
"File:c:/config.properties" C. Event delivery: By implementing the Applicationcontextaware interface

||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||

Similarities and differences of ServletContext and application

The two are essentially the same, equivalent to creating 2 different names of variables.

ServletContext is the Application object in the servlet.

ServletContext application = null;
application = Pagecontext.getservletcontext ();

Difference:

The difference between the two is that application is used in JSPs, and ServletContext is used in Servlets. Application and Page

The request session is a built-in object in the JSP, and the property data stored in the background with ServletContext can be

The Application object is obtained.

listener-Listener +servletcontext+applicationcontext