Using properties file in spring

Using Value annotation you can read an environment variable or a system variable. Here is a class where Value annotation is used on the fields to inject property values by using the key of the properties. Spring Boot provides a better alternative ConfigurationProperties annotation to read configuration values from properties file.

Next is the class annotated with ConfigurationProperties annotation which is an annotation for externalized configuration and binds some external Properties from a. JSR javax. Add the spring-boot-starter-validation to get a compliant JSR implementation on your classpath. The override ordering depends on the order these classes are registered with the application context.

In case your properties file is optional and you don't want exception to be thrown if it doesn't exist you can use ignoreResourceNotFound attribute and set it as true. Default is false. If you want to load test. If you have any doubt or any suggestions to make please drop a comment.

Posted by Anshudeep. Skip to content. Change Language. Related Articles. Table of Contents. Improve Article. Save Article. Like Article. Last Updated : 15 Dec, This YAML file also should be kept inside the classpath. The sample application. Instead of keeping the properties file under classpath, we can keep the properties in different location or path. While running the JAR file, we can specify the properties file path.

The Value annotation is used to read the environment or application property value in Java code. Look at the following example that shows the syntax to read the spring.

Spring Boot supports different properties based on the Spring active profile. For example, we can keep two separate files for development and production to run the Spring Boot application.

Let us understand how to have Spring active profile in application.