yes, you can use any programming language as long as it is intended for web development. most of the employers used the Apache serves to server php pages because it is free but its difficult to configure for web applications and deployment. visual basic and java technology such as jscript and vbs are served by the IIS servers and PWS for local intranet.
Dreamweaver is a multi and integrated environment for various platforms that uses different server software. what you need to is to specify that kind of server will you use during your development in dreamweaver

yes, you can use tomcat + JSP/Servlet and a database like MySQL to create the blog site..

any particular reason for using java technology ?

Dreamweaver generates HTML code which can have embedded java scriplets which makes it a JSP..