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Spring Boot lets you to run the same application more than once on a different port number.
Note : Default port number 8080.
Custom Port
In the application.properties file, we can set custom port number for the property server.port
server.port = 8081
In the application.yml file, you can find as follows
server:
port: 8081
Random Port
In the application.properties file, we can set random port number for the property server.port
server.port = 0
In the application.yml file, you can find as follows
server:
port: 0
Note − If the server.port number is 0 while starting the Spring Boot application, Tomcat uses the random port number.
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