Hi

If u maintain the data along with the many request ,then we need to maintain the session. if u want to maintain the session,first u can create session given below

HttpSessio session=ServletContext.getSession();

if u want to put the data in session,Then

session.setAttribute("key","value");//here key and values are same

if u want to get the data from session,then

session.getAttribute("key");

Like that u can maintain the session