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Using a method to retrieve a cookie

Derek Harper
Greenhorn

Joined: Aug 02, 2006
Posts: 25
Hi guys,

I'm doing some experimenting with cookies. Below is code from a "Murach's Java Servlets & JSP" exercise to create a cookie that stores the first name of a user and adds it to the browser:





Yes, I know it's pretty "ugly" and i've spent hours trying to figure this out :-). Where am I going wrong? Please help. Thanks in advance.

[ September 17, 2008: Message edited by: Derek Harper ]
[ September 17, 2008: Message edited by: Derek Harper ]
Steve Luke
Bartender

Joined: Jan 28, 2003
Posts: 4167
    
  21

So I am going to do this in steps.

The first step is for academic purposes, I don't support actually doing this.

1) In JSPs, methods need to be declared in JSP Declarations, they are surround with <%! %> not <% %>. So your getKookieValue method should look like this:


This doesn't actually call the method, it just declares it, so use an Expression (<%= %>) to call the method and display the results:


Like I said, I don't support using that, as it requires a lot of Java Code inside the JSP. This makes the JSP hard to manage and error-prone. The next option is the better one:

2) Use a controller servlet that gets called before this page (or every page). Use the Servlet to get the cookie value and store it in the request. Then use the JSP to retrieve the value from the request and display it:


[ August 08, 2008: Message edited by: Steve Luke ]

Steve
Derek Harper
Greenhorn

Joined: Aug 02, 2006
Posts: 25
Thanks for your reply Steve. I'll make sure to take into consideration what you recommended. I'm sorta "new" at this so I want to make sure I fully understand what's happening first.

Thanks again!
Bear Bibeault
Author and ninkuma
Marshal

Joined: Jan 10, 2002
Posts: 60785
    
  65

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