1. Introduction to @EnableConfigurationProperties
Spring Boot provides a convenient way to bind external configuration properties to Spring beans using the @EnableConfigurationProperties annotation. It enables the automatic binding of properties defined in your application’s configuration files (such as application.properties or application.yml) to fields of Spring beans.
2. Creating Configuration Properties
First, you need to create a POJO (Plain Old Java Object) to represent your configuration properties. These properties will be mapped from the configuration files.
In this example, we have created a MyAppProperties class annotated with @ConfigurationProperties. The prefix attribute specifies the prefix for the properties that should be bound to this class. For example, properties with keys starting with myapp will be bound to this class.
3. Using @EnableConfigurationProperties
Next, you need to enable the configuration properties binding by using the @EnableConfigurationProperties annotation in one of your configuration classes.
By including @EnableConfigurationProperties with the MyAppProperties class specified, Spring Boot will automatically bind the properties defined in your application’s configuration to the fields of MyAppProperties.
4. Example
Let’s create an example to demonstrate the usage of @EnableConfigurationProperties.
In this example, we have a MyApp class annotated with @SpringBootApplication. We also use @EnableConfigurationProperties to enable configuration properties binding for the MyAppProperties class.
5. Conclusion
In this tutorial, you learned how to use @EnableConfigurationProperties in Spring Boot to bind external configuration properties to Spring beans. This simplifies the process of injecting configuration properties into your Spring beans and allows for more flexible configuration management in your Spring Boot applications. By following the examples provided, you can easily integrate and use @EnableConfigurationProperties in your own Spring Boot projects.
