### Source Code for Session Example

    import java.io.*;
    import java.util.*;
    import javax.servlet.*;
    import javax.servlet.http.*;

    public class SessionExample extends HttpServlet {

        public void doGet(HttpServletRequest request, HttpServletResponse response)
        throws IOException, ServletException
        {
            response.setContentType("text/html");
            PrintWriter out = response.getWriter();

            HttpSession session = request.getSession(true);

            // print session info

            Date created = new Date(session.getCreationTime());
            Date accessed = new Date(session.getLastAccessedTime());
            out.println("ID " + session.getId());
            out.println("Created: " + created);
            out.println("Last Accessed: " + accessed);

            // set session info if needed

            String dataName = request.getParameter("dataName");
            if (dataName != null && dataName.length() > 0) {
                String dataValue = request.getParameter("dataValue");
                session.setAttribute(dataName, dataValue);
            }

            // print session contents

            Enumeration e = session.getAttributeNames();
            while (e.hasMoreElements()) {
                String name = (String)e.nextElement();
                String value = session.getAttribute(name).toString();
                out.println(name + " = " + value);
            }
        }
    }