application.properties structure in Spring Boot - Mini Project: Build & Apply

Understanding application.properties Structure in Spring Boot

📖 Scenario: You are setting up a simple Spring Boot application. You need to configure basic settings like server port and application name using the application.properties file.

🎯 Goal: Learn how to create and structure an application.properties file with key-value pairs to configure a Spring Boot application.

📋 What You'll Learn

Create an application.properties file with specific properties

Add a property for server.port with value 8081

Add a property for spring.application.name with value MyApp

Add a property for logging.level.root with value INFO

💡 Why This Matters

🌍 Real World

Spring Boot applications use application.properties to configure settings without changing code. This helps manage environments like development and production easily.

💼 Career

Knowing how to configure application.properties is essential for backend developers working with Spring Boot to customize app behavior and troubleshoot issues.

1

Create the application.properties file

Create a file named application.properties and add the property server.port=8081 to set the server port.

Spring Boot

# Your code here
server.port=8081

Need a hint?

The application.properties file uses key=value pairs. Start by setting server.port=8081.

2

Add application name property

Add the property spring.application.name=MyApp below the existing server.port property in application.properties.

Spring Boot

server.port=8081
# Your code here
spring.application.name=MyApp

Need a hint?

Add a new line with spring.application.name=MyApp to name your application.

3

Add logging level property

Add the property logging.level.root=INFO below the existing properties in application.properties to set the default logging level.

Spring Boot

server.port=8081
spring.application.name=MyApp
# Your code here
logging.level.root=INFO

Need a hint?

Set the logging level by adding logging.level.root=INFO on a new line.

4

Complete the application.properties structure

Ensure the application.properties file contains exactly these three properties in order: server.port=8081, spring.application.name=MyApp, and logging.level.root=INFO.

Spring Boot

server.port=8081
spring.application.name=MyApp
logging.level.root=INFO
# Verify all properties are present

Need a hint?

Check that all three properties are present and correctly written in the file.