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How to add Spring Boot Internationalization with Default Locale for Storing Message Strings such as Validation Messages in a message.properties file   This article will show you how to use a properties file to define static text in your application such as for validation message. All the code is appended at the bottom of the article.  You can also view all the code here: Link to Github Gist here Add Default locale and Message Source beans to your Application class   Add these classes to set your default locale and configure the location of your message properties file   Add locale and MessageSource beans to your Application Class Add a Service and Interface to retrieve message text   This service will pull the default locale from the session and then get the message text from your properties file using the messageSource. Add a service to get the msgs in your props file In your controller, use the Message s...

Change Port on a Spring Boot Application when using intelliJ  Two ways to change the port that the embedded Tomcat is using in a Spring Boot Application. The first way is to modify the application properties in the resources folder: Update application props in Spring Boot Application There are a couple issues with this approach.  You might only want this port change in your local environment and if you check it in by accident you might break things. Alternatively, you can use a command line parameter. Go to Run -> Edit Configurations -> VM options Then enter in the following argument: -Dserver.port=8090 Then click apply and OK and attempt to run the application again. Update port using VM option