1. First download the extracted tomcat locally.
2. First understand that the eclipse for WEB developers has multiple places to configure the server
Window-perferences-server-runtime envirment: Configuring Runtime envirment
Window-perferences-tomcat: This option is available with the Tomcat plugin installed (and the 3 kitten pattern is displayed on the shortcut bar), where Tomcat is automatically added to the runtime envirment with a tomcat configuration
Window-show View-servers: This is the shortcut window for the Management Server, where you can create a new server and choose Runtime Envirment.
3. After configuring the server, you can deploy the project, right-click Add and Remove. However, the deployed project will not be published to our own installed server, will be published to the eclipse itself with the server, need to change the settings, double-click the server just configured, configured as follows.
If the server locations is grayed out, you need to remove the deployed project first.
4. After you publish the project, you will see the project you published under Tomcat's WebApps.
Reference: Web projects in Eclipse are automatically deployed to Tomcat
Eclipse Configuration Tomcat