Java Web Services – bottom-top-down approach

There are two approaches to developing web services: bottom-up and top-down. In the bottom-up approach, annotated Java classes are created first, and the WSDL is generated from these classes using wsgen tool.

Bottom-up approach.

In the top-down approach, the WSDL is created first, and the Java artifacts are generated using wsimport tool.

Top-down approach.