spring-016: application.properties-common-configuration-categories

The application.properties file in Spring Boot serves as a central hub for configuring various aspects of your application. By specifying key-value pairs, you can fine-tune behaviors ranging from server settings to data source configurations. Here's a concise overview:

Common Configuration Categories

1. Server Configuration

   • Port: Define the HTTP port your application listens on.
     • server.port=8080
   • Context Path: Set the base URI for your application.
     • server.servlet.context-path=/myapp

2. Logging Configuration

   • Log Level: Adjust the verbosity of logs for specific packages.
     • logging.level.org.springframework=DEBUG
   • Log File: Specify the file to write logs to.
     • logging.file.name=app.log

3. Data Source Configuration

   • Database URL: Set the JDBC URL for your database.
     • spring.datasource.url=jdbc:mysql://localhost:3306/mydb
   • Credentials: Provide database username and password.
     • spring.datasource.username=root
     • spring.datasource.password=secret

4. Spring MVC Configuration

   • View Prefix/Suffix: Define the location and file extension for view templates.
     • spring.mvc.view.prefix=/WEB-INF/views/
     • spring.mvc.view.suffix=.jsp

5. Internationalization (i18n)

   • Locale: Set the default locale for your application.
     • spring.mvc.locale=en_US
   • Message Source: Specify the basename for message properties.
     • spring.messages.basename=messages

6. Security Configuration

   • Enable Security: Toggle Spring Security for your application.
     • spring.security.enabled=true
   • User Credentials: Define default user details.
     • spring.security.user.name=admin
     • spring.security.user.password=admin

7. Actuator Endpoints

   • Enable All Endpoints: Expose all actuator endpoints.
     • management.endpoints.web.exposure.include=*
   • Health Endpoint: Customize health check settings.
     • management.endpoint.health.show-details=always

8. Custom Application Properties

   • Define your own properties for use within the application.
     • app.feature.enabled=true
     • app.service.timeout=5000

Comprehensive Resource

For an exhaustive list of available properties and their descriptions, refer to the official Spring Boot documentation:

Common Application Properties: (docs.spring.io)