What I read your client  did not know his behind from
his elbow. Developer who know Business Development
usually came from COBOL, Visual Basic, PowerBuilder,
or one of those Database Houses. Java Developer came
from C++ or scientific community per se. During the
dot com heyday Java getting popular because it can
bridge organization operations with Web entity unit
usually belong to Marketing Dept.

Hence, you can find Java Developer with Web
development more common than with Business
development. Yet, you can find them but the
experience will be from 5 years counting down.

I feel u r client  wants to build a webbased business
application using J2EE technologies...The ppl who have
very good experience with J2EE platform will be fit
for u r requirement.