Eclipse has different versions for different project types, download address: http://www.eclipse.org/downloads/index-developer.php
When you use the Android version of the Web development, the windows->preferences option (server) is missing and the solution is as follows:
Method One:
Find Help->installnew software-> "Kepler" Repository (Http://download.eclipse.org/releases/kepler)->web,xml, Java EE and OSGi Enterprise Development->jst Server adaptersextensions (check this item)
Then complete the installation all the way next
As shown in figure
Preferences could not find the server Option >
When the installation is complete, the server option is available, as shown in
Preferences could not find the server Option >
You can follow the online routine to configure Tomcat.
Method Two:
Download the JJ2EE version to http://www.eclipse.org/downloads/index-developer.php.