Tracking user actions with session
Result
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| <%@ page import="java.util.*" %>
<html>
<body>
<!-- Step 1: Create HTML form -->
<form action="todo-demo.jsp">
Add new item: <input type="text" name="theItem"/>
<input type="submit" value="Submit"/>
</form>
<!-- Step 2: Add new item to "To Do" list -->
<%
List<String> items = (List<String>) session.getAttribute("myToDoList");
if(items == null){
items = new ArrayList<String>();
session.setAttribute("myToDoList", items);
}
String theItem = request.getParameter("theItem");
if(theItem != null){
items.add(theItem);
}
%>
<!-- Step 3: Display all "To Do" item from the session -->
<hr>
<b>To list items:</b> <br/>
<ol>
<%
for(String temp: items){
out.println("<li>" + temp + "</li>");
}
%>
</ol>
</body>
</html>
|