Question

How do I make transfer of a class object from one page to another in a jsp while doing server process too,

eg let be there a page1.jsp it have a commandObject page1 of a class Page

I then fill some of its value in page1.jsp,

I then want the same object to be transfered to another page say page2.jsp
and on that page I fill the remaining values of page1 object and then persist it to data base.

Answer 1

If you don’t wan’t to (or can’t) use a Singleton bean, how about using the request or session scopes? They are custom-made for this kind of scenario.

3.5.4.2 Request scope

Consider the following bean
definition:

<bean id="loginAction" class="com.foo.LoginAction" scope="request"/>

The Spring container
creates a new instance of the
LoginAction bean by using the
loginAction bean definition for each
and every HTTP request. That is, the
loginAction bean is scoped at the HTTP
request level. You can change the
internal state of the instance that is
created as much as you want, because
other instances created from the same
loginAction bean definition will not
see these changes in state; they are
particular to an individual request.
When the request completes processing,
the bean that is scoped to the request
is discarded.

---

3.5.4.3 Session scope

Consider the following bean
definition:

<bean id="userPreferences" class="com.foo.UserPreferences" scope="session"/> 

The Spring container
creates a new instance of the
UserPreferences bean by using the
userPreferences bean definition for
the lifetime of a single HTTP Session.
In other words, the userPreferences
bean is effectively scoped at the HTTP
Session level. As with request-scoped
beans, you can change the internal
state of the instance that is created
as much as you want, knowing that
other HTTP Session instances that are
also using instances created from the
same userPreferences bean definition
do not see these changes in state,
because they are particular to an
individual HTTP Session. When the HTTP
Session is eventually discarded, the
bean that is scoped to that particular
HTTP Session is also discarded.

Source:

• Request, session, and global session
  scopes