storing a whole page in a session

[ali al]

hello guys

can any one tell me how can i store a whole page in a servlet session?

thanks

[Ben Souther]

To bind a Java object to session, use
request.getSession().setAttribute(String, Object);
The first argument is the name you give to the object.

To retrieve it use:
reqeust.getSession().getAttribute(String);
You'll need to cast the object back down to it's original type.

So, if you want to cache the entire page to session, write all the text to a String or StringBuffer and bind it to the session.

Why do you want to do this?

[ali al]

i need to do some thing like this:

i have a page which has two questions and every question has three choices, the user should choose one choice of every quetion, if the user press a button to submit this page with out answering the quetion an error will come up probting the user to go back, so when he goes back he should see one of he is choices unchanged with out using the back button.

[Ben Souther]

The normal way of dealing with this is to retrieve the values from the form,
validate them and redraw the form if any are invalid.
There is no need to store the entire page.
Besides, you'll want to add a message to the page telling the user what values are invalid.