This post tells the needed command  to run tomcat7-maven-plugin On Different Port then 8080.

Usually the built project (war) via MVN with tomcat7 plugin used to be run with command

: mvn tomcat7:run  , On this it takes default port as 8080

But in a situation where it require to change the port other than 8080 then add the following option :  -Dmaven.tomcat.port=8181

So overall command line : mvn  tomcat7:run -Dmaven.tomcat.port=8181 ( if running from command line)

This is how its configured on Idea Intellij:

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