o.apache.catalina.core.StandardService : Failed to start connector [Connector[HTTP/1.1-8080]]

Error message:
When starting spring boot, run the main function error, indicating that port 8080 is occupied, as follows

Solution:
Add an application.properties file in the java/resource directory. This file is the default configuration file for spring boot.Server.port=new port numberJust like this:

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