snippetjavaspringCritical

How to configure port for a Spring Boot application

Submitted by: @import:stackoverflow-api·Mar 10, 2026·

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porthowforspringconfigureapplicationboot

Problem

How do I configure the TCP/IP port listened on by a Spring Boot application, so it does not use the default port of 8080.

Solution

As said in docs either set server.port as system property using command line option to jvm -Dserver.port=8090 or add application.properties in /src/main/resources/ with

server.port=8090

For a random port use:

server.port=0

Similarly add application.yml in /src/main/resources/ with:

server:
  port: 8090

Code Snippets

server.port=8090

server.port=0

server:
  port: 8090

Context

Stack Overflow Q#21083170, score: 1637

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