Hi i'm a java developer planning to develope a software for my new medical shop. Which framework shall I use.

Sir, I'm a Java developer setting up a medical shop @ my location , Since i'm a J2EE developer i'm planning to write a s/w to maintain my medical shop's daily transaction and stock maintenance and weekly/monthly/yearly reports,also it should be web base.( is Web based application good for my requirements ? )

Need advice and which "JAVA" framework to use to develope my s/w also which DB to use. preferably using all open source tools available in the market.