Write a code snippet that gets an HttpSession object from a

Write a code snippet that gets an HttpSession object from a request object, uses the session object to set an attribute named orderNumber to the value of a variable named orderNumber, retrieves the orderNumber as a string from the session object, and then finally uses the session object to remove the orderNumber attribute.

Solution

// getting session object fron request

HttpSession session = request.getSession();

// setting orderNumber in session with name \'orderNumber\'

session.setAttribute(\"orderNumber\", orderNumber);

//getting orderNumber from session
// getAttribute return Object so need to typecast
String orderNumber = (String)session.getAttribute(\"orderNumber\");

// removing orderNumber
session.removeAttribute(\"orderNumber\");