jsf JSF Annotations Managed bean scope annotation

Example

Create managed bean

To create a manage bean you need the annotation @ManagedBean

for example:

@ManagedBean
public class Example {}

You need the package:

import javax.faces.bean.ManagedBean;

Managed bean Scope

We use annotations to define the scope in which the bean will be stored.

There are many scope of managed bean: @NoneScoped, @RequestScoped, @ViewScoped, @SessionScoped, @ApplicationScoped, ...

• Application (@ApplicationScoped): Application scope persists across all users’ interactions with a web application.
• Session (@SessionScoped): Session scope persists across multiple HTTP requests in a web application.
• View (@ViewScoped): View scope persists during a user’s interaction with a single page (view) of a web application.
• Request (@RequestScoped): Request scope persists during a single HTTP request in a web application.
• None (@NoneScoped): Indicates a scope is not defined for the application.
• Custom (@CustomScoped): A user-defined, nonstandard scope. Its value must be configured as a java.util.Map. Custom scopes are used infrequently.