How Can I Configure the Port for My Spring Boot Application?

Configuring Port for a Spring Boot Application

When deploying a Spring Boot application, it's often necessary to specify a specific port for it to listen on, rather than relying on the default port (8080). This can be achieved through a few simple configuration methods.

Configure using System Property

One option is to use a system property when starting the application, using the -Dserver.port argument. For example:

java -Dserver.port=8090 -jar my-app.jar

Configure using Application Properties or YAML

Alternatively, you can create an application.properties or application.yml file and set the server.port property within it. Place the file in the /src/main/resources/ directory.

application.properties:

server.port=8090

application.yml:

server:
  port: 8090

Use a Random Port

If you want the application to listen on a random port, assign the value 0 to server.port:

server.port=0

server:
  port: 0

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