I would like to ask how can I deploy a war file to Microsoft IIS 7? Thanks in advance.
You can't. You need a Java EE Web Container such as Tomcat or JBoss in order to do so. IIS can just act as a front facing proxy for the stuff hosted through the WAR file.
What you probably need is a way to connect IIS and Tomcat together so that requests for any dynamic resources such as JSPs and Servlets can be delegated to Tomcat.
The following link explains how to do so in detail.
http://tomcat.apache.org/connectors-doc/webserver_howto/iis.html