/*
* Cart2.java
*
* Proper session tracking using Servlet Session Tracking API.
*/
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class Cart2 extends HttpServlet {
public void init() throws ServletException
{
}
public void doPost( HttpServletRequest request, HttpServletResponse response )
throws ServletException, IOException
{
doGet( request, response );
}
public void doGet( HttpServletRequest request, HttpServletResponse response )
throws ServletException, IOException
{
HttpSession sess = request.getSession();
if( sess.getAttribute("cart") == null )
sess.setAttribute( "cart", new ArrayList() );
response.setContentType( "text/html" );
PrintWriter out = response.getWriter();
out.print( "" );
out.println( "Shopping Cart" );
out.println( "" );
// add new item
ArrayList cart = (ArrayList) sess.getAttribute( "cart" );
String item = request.getParameter("item");
if( item != null && request.getParameter("add") != null )
cart.add( item );
// show items
for( int i=0 ; i < cart.size() ; ++i )
out.println( cart.get(i) + "
" );
// a form to add more
out.println( "");
out.println( "" );
out.println( "" );
}
} // end of class Cart2