This is my usual method:
In server.xml in tomcat, add after </Host> tag
<Host name="域名1" appBase="webapps"
unpackWARs="true" autoDeploy="true">
<Context path="" docBase="Project 1 storage directory"></Context>
</Host>
<Host name="域名2" appBase="webapps"
unpackWARs="true" autoDeploy="true">
<Context path="" docBase="Project 2 storage directory"></Context>
</Host>
And so on, multiple domain names can be configured. Remember to restart tomcat after configuration.