Use NetBeans or Eclipse. Both of them make it really easy to create a new web service from an existing WSDL.
Eclipse tutorial:
http://www.eclipse.org/webtools/community/tutorials/TopDownAxis2WebService/td_tutorial.html
NetBeans tutorial:
http://weblogs.java.net/blog/2008/03/05/developing-webservices-wsdl-using-netbeans