Created
August 24, 2017 15:12
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JSP course - session demo
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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 --> | |
| <% | |
| // get the TO DO items from the session | |
| List<String> items = (List<String>) session.getAttribute("myToDoList"); | |
| // if the TO DO items doesn't exist, then create a new one | |
| if (items == null) { | |
| items = new ArrayList<String>(); | |
| session.setAttribute("myToDoList", items); | |
| } | |
| // see if there is form data to add | |
| String theItem = request.getParameter("theItem"); | |
| if (theItem != null) { | |
| items.add(theItem); | |
| } | |
| %> | |
| <!-- Step 3: Display all "To Do" item from session --> | |
| <hr> | |
| <b>To List Items:</b> <br/> | |
| <ol> | |
| <% | |
| for (String temp : items) { | |
| out.println("<li>" + temp + "</li>"); | |
| } | |
| %> | |
| </ol> | |
| </body> | |
| </html> | |
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