Page scope- scope in jsp

Question

There are following scopes in jsp:

page scope

request scope

session scope

and application scope.

I am confused about page scope. Can any

Answer 1

The page scope indicates that, in addition to being bound to a local variable, the bean object should be placed in the javax.servlet.jsp.PageContext object for the duration of the current request.

Acording to Allamaraju (2004):

JSP defines four scopes for the objects that can be used by the JSP authors:

+-------------+------------------------------------------------------+
| Scope       | Description                                          |
+-------------+------------------------------------------------------+
| page        | Objects can be accessed only within the JSP page     |
|             | in which they are referenced.                        |
+-------------+------------------------------------------------------+
| request     | Objects can be accessed within all the pages that    |
|             | serve the current request. These include pages       |
|             | that are forwarded to, and included in, the original |
|             | JSP page to which the request was routed.            |
+-------------+------------------------------------------------------+
| session     | Objects can only be accessed within the JSP pages    |
|             | accessed within the session for which the objects    |
|             | are defined.                                         |
+-------------+------------------------------------------------------+
| application | Application scope objects can be accessed by all     |
|             | JSP pages in a given context.                        |
+-------------+------------------------------------------------------+

Storing the object there means that servlet code can access it by calling getAttribute on the predefined pageContext variable. Since every page and every request has a different PageContext object, this indicates that the bean is not shared and thus a new bean will be created for each request.

See more in JSP Tutorial. Servlet Tutorial. Beginning and Intermediate-Level.

---

References

Allamaraju, S. (2004). Professional Java Servlets 2.3. Berkeley, Calif: Apress.