/**
* Simple Shopping Cart V0
*
* Just form, no session tracking
*/
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class Cart0 extends HttpServlet {
Vector cart;
/**
* Create a form
*/
String createForm()
{
String form="";
String method = "method=get";
String action = "action=Cart0";
String e1 = "Item:
";
String e2 = "";
String e3 = "
";
form += "";
return form;
}
/**
* Create a list of items already bought
*/
String createList()
{
String list = "";
for( int i=0 ; i < cart.size() ; ++i )
if( cart.elementAt(i) != null )
list += (String) cart.elementAt(i) + "
";
return list;
}
/** init() */
public void init() throws ServletException
{
cart = new Vector();
}
/** doGet() */
public void doGet( HttpServletRequest request, HttpServletResponse response )
throws ServletException, IOException
{
if( request.getParameter("buy") != null )
cart.add( request.getParameter("item") );
// doc type, html, title, body
response.setContentType("text/html");
String doc = "\n";
doc += "Simple Shopping Cart\n";
if( request.getParameter("done") != null ) doc += createList();
else doc += createForm();
// closing body and html. set content type to be html and write out
doc += "";
PrintWriter out = response.getWriter();
out.println( doc );
}
}