In this tutorial, you will learn to use @ConfigurationProperties to map properties files to POJO classes in Spring Boot application. Let's get started to build a simple example with Java and Maven
What you'll need
- JDK 8+ or OpenJDK 8+
- Maven 3+
Stack
- Java
- Spring Boot
Init project structure and dependencies
Project structure
├── src
│ └── main
│ ├── java
│ │ └── com
│ │ └── hellokoding
│ │ └── util
│ │ ├── Application.java
│ │ ├── NestedProperties.java
│ │ └── SimpleProperties.java
│ └── resources
│ └── application.properties
└── pom.xml
Project dependencies
Define Properties file and handler
Properties file
Mapping Properties file into POJO classes
Config and Run
Application Bootstrap
Run with Maven
Type the below command at the project root directory
mvn clean spring-boot:run