Spring Boot provides sensible defaults for many configuration properties. But we sometimes need to customize these with our case-specific values. And a common use case is changing the default port for the embedded server.

To change the default port we can use the application.properties file :

server.port=8081

Or we can use the application.yml file :

server: port : 8081

Here we changed the default Tomcat port 8080 to 8081. We can use a Java configuration to change the default port .

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