How to build a small database application?

Hi experts,
I am quite new to java, and now, my company has a demand to build a clients tracing system, clients can input their profiles, but every client can only retrieve or modify his/her own records.
Database will be mysql.
My questions:
1. how to control the security? it means how to control it by login-out?
2. Do I need application server, i.e. Tomcat?
3. What technology can I use to code? Servlet or JSP? I think it is not so complex that I have to use Servlet, right?
Thanks.
Lonely.Wolf

My questions:
1. how to control the security? it means how to control it by login-out?It depends.
2. Do I need application server, i.e. Tomcat?Will this be a Web-based application, allowing clients to access the database over the Internet? Will you be using servlets/JSPs? If so, Tomcat is a fine servlet/JSP engine, but there are others. You'll probably want some kind of application server. Which one depends on your design and budget.
3. What technology can I use to code? Servlet or JSP?Yes.
I think it is not so complex that I have to use Servlet, right?Whether or not you use servlets has nothing to do with complexity. Use servlets to respond to HTTP requests.
Hard to design anything based on what you've posted. But a JSP view, servlet controller, and DAO persistence layer will get this system up and running.
Do you know servlets, JSPs, and JDBC well enough to do this?

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