maven-tomcat-plugin

http://mojo.codehaus.org/tomcat-maven-plugin/deployment.html

The plugin provides various methods of deployment to Tomcat:

• Deploying a WAR file
• Deploying an exploded WAR directory, with an optional context.xml file
• Deploying an in-place WAR directory, with an optional context.xml file
• Deploying a context.xml file
• Running a WAR project