Assuming that you have JAXB installed Go to the following directory C:\Program Files\jaxb\bin open command window here
> xjc -wsdl http://localhost/mywsdl/MyDWsdl.wsdl C:\Users\myname\Desktop
C:\Users\myname\Desktop is the ouput folder you can change that to your preference
http://localhost/mywsdl/MyDWsdl.wsdl is the link to the WSDL