//shopping.html
shopping stor ------------------------------------------------------------------
//carts.jsp
<%@page contentType="text/html;charset=ISO8859_1" %>
<%
cart.processRequest();
%>
you have chosen these items:
<%
String []items=cart.getItems();
for(int i=0;i {
%>
- <%=items[i] %>
<%
}
%>
<%@include file="shopping.htm" %>
---------------------------------------------------------------------//DummyCart.java
package test;
import javax.servlet.http.*;
import java.util.Vector;
import java.util.Enumeration;
public class DummyCart
{
Vector v = new Vector();
String submit=null;
String item= null;
private void addItem(String name)
{
v.addElement(name);
}
private void removeItem(String name)
{
v.removeElement(name);
}
public void setItem(String s)
{
item=s;
}
public void setSubmit(String s)
{
submit=s;
}
public String[] getItems()
{
String []s=new String[v.size()];
v.copyInto(s);
return s;
}
public void processRequest()
{
if(submit==null)
addItem(item);
if(submit.equals("add"))
addItem(item);
else if (submit.equals("remove"))
removeItem(item);
reset();
}
private void reset()
{
submit=null;
item=null;
}
}
----------------------------------------------------------------------
上面是一个简单的例子，功能都能实现，对网页效果要求更漂亮些的可做一些修改。
