How Can I Configure the Server Port in My Spring Boot Application?

Configuring Port Configuration in Spring Boot Applications

When developing Spring Boot applications, it's often necessary to configure the TCP/IP port on which the application listens. By default, Spring Boot uses port 8080. To change this, you can leverage several configuration options.

Setting Server Port Property

A straightforward method is to set the server.port property as a system property using the -D command line option for the Java virtual machine (JVM):

-Dserver.port=8090

Using application.properties

Alternatively, you can create an application.properties file within the /src/main/resources/ directory and add the following line:

server.port=8090

Using application.yml

In a similar vein, you can use a application.yml file in /src/main/resources/ and specify the port:

server:
  port: 8090

Enabling Random Ports

If you need to bind to a random port, you can use the following value:

server.port=0

By leveraging these configuration options, you can customize the port number your Spring Boot application listens on, ensuring it aligns with your desired network configuration.

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