Web - What is easiest way to implement User Security and User Profiles

Hi, I am new to these forums and kind of new to Java. Sorry if this is in the wrong forum!
Bit of background to my experience with java
I have been playing about with java for a number of years and have created a few basic programs such as a screen shot tool that allows you to capture to default locations and look at previews first etc. I am now venturing into web related stuff. I work in IT doing systems testing and have done bits of basic development on various things.
What I've done so far
I am using Netbeans IDE 6.7 and MySQL 5.0
I am trying to learn more complex java and have decided to try build a basic web / database system that basically implements adding / amending / deleting data from a MySQL database through web pages. I am now trying to implement basic user access and profiles. I have so far got the following:
- MySQL table with user info - username / password
- JSP page with usual login stuff
- Servlet that validates the username and password - if correct forwards to main menu page.
Its as simple as that - there is nothing stopping you just typing in the URL of the main menu page and going from there.
What I want
I am wanting to eventually get the following:
- User authentication so that you have to logon before you can access anything else
- User profiles that determine what each user can or can't do, restricting the pages / services / options available (i.e. normal user can't delete etc)
- Would it need some sort of session manager to allow multiple users etc?
I appreciate this is a fairly open question but what is the easiest way to start implementing this? Not after specific code as I would prefer to try figger things out myself, but a point in the right direction would be great. It doesn't have to be extremely secure as this is just for me at the minute.
I have spent all day looking at things like session data / url rewriting / security settings in web.xml / bespoke servlets and am now in java overload!

Hi everyone,
I've now actually gone back to the tutorial that I linked to above and implemented that using form login and j_security_check.
Agree with Saish, and although I don't know enough about the other options to give a good reason, using realms and j_security_check just seems to be a bit cluncky and messy. I would also prefer something a bit more generic, that doesn't rely on setting users in glassfish, hence why I started with my own user table.
Anyway, I will leave it as is for now and maybe come back and try one of the other options.
The only problem I can see now is that to add users i will need to go through all the steps of adding users in glassfish and web.xml... Is there a way to do this through a servlet or something so I can have a jsp page to add users that also creats all the other bits for it to work?
Thanks everyone for your help

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