// SessionDemo.java
//
// from http://jserv.javasoft.com/demo/index.html
import java.io.*; 
import java.util.*; 
import javax.servlet.*; 
import javax.servlet.http.*; 

public class SessionDemo extends HttpServlet { 
  
    public void doGet(HttpServletRequest req, 
                      HttpServletResponse res) 
        throws ServletException, IOException  { 
        PrintWriter out = res.getWriter(); 

        // get session object 

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

        // print session contents 

        String[] valueNames = session.getValueNames(); 
        if (valueNames != null &&  valueNames.length > 0) { 
            for (int i = 0; i < valueNames.length; i++) { 
                String name = valueNames[i]; 
                String value = 
                     session.getValue(name).toString(); 
                out.println(name + " = " + value); 
            } 
        } 
    } 
}