Maven, Eclipse and Tomcat

When building a Maven project in Eclipse, this error may occur if the build goal is not set:
      No goals have been specified for this build.

To build it and start it with Tomcat:

1. Right click on the project;
2. Select Run As -> Maven build
3. In the dialog, on the right side, find the Goals input. Input the goal: -Dmaven.tomcat.port=8080 tomcat:run
4. Click the Run button.